UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number			811-06637
The UBS Funds
(Exact name of registrant as specified in charter)
1285 Avenue of the Americas, New York, NY					10019-6028
(Address of principal executive offices)					(Zip code)
Mark F. Kemper, Esq. UBS Global Asset Management 1285 Avenue of the Americas, 12th Floor New York, NY 10019-6028
(Name and address of agent for service)
Copy to: Bruce Leto, Esq. Stradley Ronon Stevens & Young, LLP 2600 One Commerce Square Philadelphia, PA 19103-7098
Registrant’s telephone number, including area code:				212-713 3000
Date of fiscal year end:	June 30
Date of reporting period:		December 31, 2009

Item 1.  Reports to Stockholders.

The UBS Funds—Fixed Income

Semiannual Report

December 31, 2009

Table of contents
President's letter	1
Market commentary	2
Fixed Income
UBS Absolute Return Bond Fund	4
UBS Global Bond Fund	18
UBS High Yield Fund	30
UBS U.S. Bond Fund	44
Explanation of expense disclosure	55
Statement of assets and liabilities	58
Statement of operations	62
Statement of changes in net assets	64
Financial highlights	66
Notes to financial statements	74
General information	94

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President's letter

February 17, 2010

Dear shareholder,

The market developments of the past several months highlight the importance of remaining steadfast to established investment processes and valuation disciplines.

When I last wrote to you on these pages six months ago, the S&P 500 Index was in the early stages of attempting to climb back from one of the steepest declines in its history, investor confidence was at an all-time low and the investing landscape appeared to be undergoing unprecedented changes.

Today, we can observe that both the S&P 500 Index and the MSCI World Free Index (net)—proxies of stock performance in the US and global markets, respectively—have generated solid double-digit returns. What's more, confidence appears to be returning to the markets—albeit tentatively—as investors begin to venture back into riskier assets. That said, however, the markets continue to face the very challenging task of assessing the risks of deflation versus inflation.

Despite the many changes and challenges faced by investors throughout the recent bear market, what remained the same is our unwavering commitment to provide you with investment solutions designed to help you reach your long-term goals. We firmly believe that key to delivering on this commitment in any market environment is adherence to the disciplines and processes that, in our view, have proven their investment value over time.

Today, I am pleased to report that we are being rewarded for maintaining this conviction, as a number of the UBS Funds have generated solid performance versus their respective benchmarks over the review period. Still, as satisfying as it is for me to report this news to you, I find myself already looking to the future. No one can rely on past performance when it comes to delivering future results. We are keenly aware that we need to remain nimble—constantly growing and evolving to meet the challenges that will be presented by this brave new market landscape. In the past, I have written of some of the measures we have already taken to this end, including restructuring our fixed income investment team, and broadening the reach of some of our investment capabilities to ensure they are well-positioned to navigate the marketplace.

More recently, we have continued to build out what I believe is an impressive organization of investment professionals who have the experience and insight required to take our shareholders through the next decade and beyond. This includes bringing on board Andreas Koester, who became Head of Asset Allocation for our Global Investment Solutions team in September 2009. In this role, Andreas has helped implement process refinements and a team restructuring that we believe will better position our multi-asset portfolios in the years to come.

We don't take lightly the responsibility you assigned to us when you chose us as your asset manager. I thank you, as always, for your continued support.

Kai R. Sotorp
President
UBS Funds
Head—Americas
UBS Global Asset Management (Americas) Inc.

1

The markets in review

Strengthening Economic Conditions

While economic growth in the US remained strained when the reporting period began, the recession—considered to be the longest since the Great Depression—appears to have ended. Signs of a turnaround first emerged in the second quarter of 2009, when gross domestic product ("GDP") fell at a more modest pace than in prior quarters. Subsequently, third quarter GDP grew 2.2%, in large part due to the government's efforts to stimulate the economy. Some of the measures instituted by the government included an $8,000 tax credit for first-time home buyers, as well as the "Cash for Clunkers" car rebate program. As the period drew to a close, economic growth continued to accelerate, as evidenced by the 5.7% advance estimate for fourth quarter GDP.

Economic growth also improved overseas. During the reporting period, data was released indicating that the recessions in Germany and France concluded during the second quarter of 2009, while economic growth in the UK and Japan also resumed. In many instances, growth rates in emerging markets countries held up relatively better than their developed country counterparts. As a case in point, although growth moderated in China, it avoided falling into a recession.

The global equity markets continued to rally

The global equity markets, which started to rebound in March 2009, continued to move higher over the six-months ended December 31, 2009. The S&P 500 Index¹ posted positive returns during five of the last six months of 2009, and gained 22.59% over the reporting period as a whole. The market's continued ascent was due to a variety of factors, including further improvements in the credit markets, signs that the economy was recovering, better-than-expected corporate profits and robust investor risk appetites.

The international equity markets also generated strong results during the reporting period. International developed stocks, as measured by the MSCI EAFE Index (net),² returned 22.07% during the six months ended December 31, 2009. Emerging markets equities generated even better results, with the MSCI Emerging Markets Index³ gaining 31.42% over the same period. Rising commodity prices and an improving economic backdrop were two of the factors supporting emerging market equity prices.

¹  The S&P 500 Index is an unmanaged, weighted index composed of 500 widely held common stocks varying in composition, and is not available for direct investment. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

²  The MSCI EAFE Index (net) is an index of stocks from 21 countries designed to measure the investment returns of developed economies outside of North America. Dividends are reinvested after the deduction of withholding tax, using tax rates applicable to Luxembourg holding companies, as Luxembourg applies the highest rates. The Index is constructed and managed with a view to being fully investable from the perspective of international institutional investors. Investors should note that indices do not reflect the deduction of fees and expenses.

³  The MSCI Emerging Markets Index is a market capitalization-weighted index composed of companies representative of the market structure of 22 emerging market countries in Europe, Latin America, and the Pacific Basin. The Index is constructed and managed with a view to being fully investable from the perspective of international institutional investors. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

2

The markets in review

Risk-taking is rewarded in the fixed income markets

The US bond market generated positive results during the reporting period. In sharp contrast to late 2008 and early 2009, when investors were drawn to the relative safety of short-term Treasuries, risk aversion continued to abate over the six months covered by this report. This change in investor sentiment was due to a number of factors, including economic conditions that transitioned from being "less negative" to showing signs of meaningful improvement. Against this backdrop, the US spread sectors (non-Treasuries) generated strong results during the reporting period.

Overall, during the six months ended December 31, 2009, the overall US bond market, as measured by the Barclays Capital US Aggregate Index,⁴ returned 3.95%. Looking at the riskier fixed income asset classes, high yield bonds and emerging markets debt generated very strong results over the six-month reporting period. During that time, the Merrill Lynch US High Yield Cash Pay Constrained Index⁵ gained 21.10%, while the J.P.Morgan Emerging Markets Bond Index Global (EMBI Global)⁶ rose 11.89%.

⁴  The Barclays Capital US Aggregate Index (formerly known as the Lehman Brothers US Aggregate Index) is an unmanaged index of the USD-denominated, investment-grade, fixed-rate, taxable bond market of SEC-registered securities. The index includes bonds from the treasury, government-related, corporate, mortgage-backed, asset-backed and commercial mortgage-backed sectors. US agency hybrid adjustable rate mortgage (ARM) securities were added to the Index on April 1, 2007. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

⁵  The Merrill Lynch US High Yield Cash Pay Constrained Index is the index of publicly placed non-convertible, coupon-bearing US dollar denominated below investment grade corporate debt with a term to maturity of at least one year. The index is market weighted, so that larger bond issuers have a greater effect on the index's return. However, the representation of any single bond issue is restricted to a maximum of 2% of the total index. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

⁶  The J.P. Morgan Emerging Markets Bond Index Global (EMBI Global) is an unmanaged index which tracks total returns for US-dollar-denominated debt instruments issued by emerging market sovereign and quasi-sovereign entities: Brady bonds, loans and Eurobonds. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

3

UBS Absolute Return Bond Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS Absolute Return Bond Fund (the "Fund") returned 3.14% (Class A shares returned 0.60% after the deduction of the maximum sales charge), while Class Y shares returned 3.23%. For purposes of comparison, the Merrill Lynch US Treasury 1-3 Year Index returned 0.81%, and the US LIBOR 3-Month Index (the "Index") returned 0.19%. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 6; please note that the Fund's returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect fees and expenses.)

The Fund generated solid results during the reporting period. In particular, spread management, sector selection and currency management enhanced the Fund's results. This was somewhat offset by security selection and duration positioning.

Portfolio performance summary¹

What worked

•  Spread management was rewarded. Spread management—the allocation of assets among non-government sectors of the fixed income market—was a significant positive contributor to the Fund's performance during the six-month period.

•  Sector selection benefited performance during the period.

  – Continuing the trend that began earlier in the year, corporate bond spreads² continued to narrow during the reporting period as investor risk aversion abated. This was a positive for performance as corporate bonds substantially outperformed government securities during the reporting period. In particular, the Fund's holdings in the financial and, to a lesser extent, the industrials sector boosted its returns.

  – The Fund's holdings in the securitized markets added value during the six–month period. In particular, the Fund's holdings in residential mortgage-backed securities, collateralized debt obligations and asset-backed securities performed well as investor risk appetites remained robust and global economic conditions improved.

•  Active currency management was beneficial. Throughout the six month period, we implemented a number of tactical currency trades to take advantage of what we viewed as opportunities in the foreign exchange markets. As a whole, this contributed to the Fund's performance.

What didn't work

•  Security selection was a modest detractor from the Fund's performance. Holding some rather conservative names was slightly negative for results in a market in which risk-taking was heavily rewarded.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

²  The spread is the difference between the yield paid on US Treasury bonds and higher risk securities.

4

UBS Absolute Return Bond Fund

•  The Fund's duration positioning was negative for performance. The Fund's duration (which is a measure of a portfolio's sensitivity to changes in interest rates) was actively managed during the reporting period. When the six-month period began, the Fund had an overall long duration. While we adjusted duration and ended the period with a short duration, our positioning as a whole detracted from performance.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

5

UBS Absolute Return Bond Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			Inception1
Before deducting maximum sales charge
Class A2		3.14	%		6.90	%		(4.05	)%
Class C3		2.95	%		6.51	%		(4.38	)%
Class Y4		3.23	%		7.09	%		(3.88	)%
After deducting maximum sales charge
Class A2		0.60	%		4.22	%		(4.58	)%
Class C3		2.45	%		6.01	%		(4.38	)%
Merrill Lynch US Treasury 1-3 Year Index5		0.81	%		0.78	%		4.26	%
US LIBOR 3- Month Index6		0.19	%		0.76	%		3.72	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.13% and 1.01%; Class C—1.43% and 1.36%; Class Y—0.84% and 0.84%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses.

The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred through investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.00% for Class A shares, 1.35% for Class C shares and 0.85% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense l imit that is in place for the Fund.

¹  Inception date of all shares of UBS Absolute Return Bond Fund is April 27, 2005. Inception date of the indices, for the purpose of this illustration, is April 30, 2005.

²  Maximum sales charge for Class A shares is 2.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class C shares is 0.5% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁴  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁵  The Merrill Lynch US Treasury 1-3 Year Index is an unmanaged index tracking short-term US Treasury securities with maturities between 1 and 3 years. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

⁶  The US LIBOR 3-Month Index is based on LIBOR, the London Interbank Offered Rate, a short-term interest rate that banks charge one another generally representative of the most competitive and current cash rate available. The US LIBOR 3-Month Index tracks the interest rate earned on a three month inter-bank deposit in US dollars. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

6

UBS Absolute Return Bond Fund

Top ten fixed income holdings (unaudited)

As of December 31, 2009

	Percentage of net assets
Federal Home Loan Mortgage Corp., 5.000%, due 02/16/17		6.1	%
Hypothekenbank in Essen AG, 5.250%, due 01/17/11		3.9
Federal Home Loan Mortgage Corp., 4.750%, due 03/05/12		3.4
US Treasury Note, 1.375%, due 03/15/12		3.2
Compagnie de Financement Foncier, 3.625%, due 01/16/12		3.2
Federal National Mortgage Association, 5.000%, due 10/15/11		3.1
Federal Home Loan Bank, 5.250%, due 06/18/14		3.0
Federal National Mortgage Association, 4.125%, due 04/15/14		2.9
Kreditanstalt fuer Wiederaufbau, 3.375%, due 01/16/12		2.7
Federal National Mortgage Association Pools, #933765, 4.500%, due 04/01/38		2.6
Total		34.1	%

Country exposure, top five (unaudited)

As of December 31, 2009

	Percentage of net assets
United States		44.3	%
Germany		10.5
France		8.2
United Kingdom		6.3
Netherlands		3.4
Total		72.7	%

7

UBS Absolute Return Bond Fund

Industry diversification (unaudited)

As a percentage of net assets as of December 31, 2009

Bonds
Corporate bonds
Aerospace & defense	0.37	%
Building materials	0.26
Capital markets	0.94
Commercial banks	5.35
Communications equipment	0.21
Computers & peripherals	0.29
Diversified financial services	9.21
Diversified telecommunication services	2.47
Electric utilities	1.61
Food & staples retailing	2.00
Health care providers & services	0.44
Industrial conglomerates	0.28
Media	0.30
Metals & mining	1.22
Oil, gas & consumable fuels	1.64
Personal products	0.57
Pharmaceuticals	0.24
Road & rail	0.43
Sovereign	1.12
Thrifts & mortgage finance	7.32
Tobacco	2.55
Wireless telecommunication services	0.96
Total corporate bonds	39.78	%
Asset-backed securities	0.84	%
Collateralized debt obligations	1.04
Commercial mortgage-backed securities	0.42
Mortgage & agency debt securities	24.89
US government obligation	3.25
Non US-government obligations	16.64
Sovereign/supranational bonds	4.41
Total bonds	91.27	%
Short-term investment	3.71
Total investments	94.98	%
Cash and other assets, less liabilities	5.02
Net assets	100.00	%

8

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Bonds: 91.27%
Corporate bonds: 39.78%
Australia: 0.84%
BHP Billiton Finance Ltd., 4.750%, due 04/04/12	EUR	300,000	$	452,579
Rio Tinto Finance USA Ltd., 8.950%, due 05/01/14	$	400,000		479,320
Westpac Banking Corp., 4.200%, due 02/27/15		350,000		355,765
Total Australia corporate bonds				1,287,664
Denmark: 0.24%
Dong Energy A/S, 4.875%, due 05/07/14	EUR	250,000		377,574
France: 6.64%
BNP Paribas, 0.467%, due 11/23/151	$	3,750,000		3,659,940
Casino Guichard Perrachon SA, 5.500%, due 01/30/15	EUR	550,000		840,995
Compagnie de Financement Foncier, 3.625%, due 01/16/12		3,350,000		4,954,206
Credit Agricole SA, 0.454%, due 03/13/161	$	800,000		786,042
Total France corporate bonds				10,241,183
Germany: 4.24%
Hypo Real Estate Bank AG, 0.841%, due 02/09/101	EUR	250,000		356,986
Hypothekenbank in Essen AG, 5.250%, due 01/17/112		4,000,000		5,964,245
IKB Deutsche Industriebank AG, 0.787%, due 03/19/101		150,000		212,283
Total Germany corporate bonds				6,533,514
Italy: 1.17%
Telecom Italia SpA, 4.750%, due 05/19/14	EUR	1,200,000		1,798,781
Luxembourg: 0.53%
ArcelorMittal, Series A, 9.000%, due 02/15/15	$	350,000		413,384
GAZ Capital SA, 6.580%, due 10/31/13	GBP	250,000		401,781
Total Luxembourg corporate bonds				815,165
Netherlands: 3.09%
CRH Finance BV, 7.375%, due 05/28/14	EUR	250,000		406,182

	Face Amount		Value
LeasePlan Corp. NV, 0.889%, due 02/16/101	EUR	300,000	$	427,378
MDC BV, 5.750%, due 05/06/143	$	1,650,000		1,724,250
PACCAR Financial Europe BV, 5.125%, due 05/19/11	EUR	350,000		509,680
Rabobank Nederland NV, 4.000%, due 09/10/15	GBP	230,000		375,113
RWE Finance BV, 4.625%, due 08/17/10		800,000		1,315,119
Total Netherlands corporate bonds				4,757,722
Qatar: 0.28%
Qtel International Finance Ltd., 6.500%, due 06/10/143	$	400,000		432,560
South Korea: 0.34%
Hyundai Capital Services, Inc., 6.000%, due 05/05/153		500,000		522,082
Spain: 0.50%
Telefonica Emisiones SAU, 5.431%, due 02/03/14	EUR	500,000		771,329
Sweden: 0.24%
Vattenfall Treasury AB. 4.250%, due 05/19/14	EUR	250,000		374,406
Switzerland: 0.88%
Credit Suisse/London, 6.125%, due 05/16/14	EUR	850,000		1,350,320
United Kingdom: 6.27%
Anglo American Capital PLC, 9.375%, due 04/08/143	$	450,000		539,972
HBOS PLC, 1.018%, due 09/01/161	EUR	550,000		618,960
HSBC Holdings PLC, 4.500%, due 04/30/14		250,000		377,051
Imperial Tobacco Finance PLC, 8.375%, due 02/17/16		1,200,000		2,081,415
Reed Elsevier Investments PLC, 5.625%, due 10/20/16	GBP	450,000		733,563
Royal Bank of Scotland Group PLC, 5.250%, due 05/15/13	EUR	1,000,000		1,478,466
Smiths Group PLC, 6.050%, due 05/15/143	$	400,000		425,190
Tesco PLC, 5.875%, due 09/12/16	EUR	1,400,000		2,240,465
Vodafone Group PLC, 5.750%, due 03/15/16	$	650,000		699,140

9

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
WPP PLC, 6.625%, due 05/12/16	EUR	300,000	$	465,348
Total United Kingdom corporate bonds				9,659,570
United States: 14.52%
Altria Group, Inc., 9.250%, due 08/06/19	$	300,000		365,588
American Honda Finance Corp., 3.875%, due 09/16/14	EUR	200,000		292,080
Anadarko Petroleum Corp., 5.750%, due 06/15/14	$	1,000,000		1,083,658
AT&T, Inc., 4.850%, due 02/15/14		750,000		797,471
Avon Products, Inc., 5.625%, due 03/01/14		810,000		882,817
BAE Systems Holdings, Inc., 4.950%, due 06/01/143		550,000		572,684
Bank of America Corp., 4.900%, due 05/01/13		1,400,000		1,451,396
Cisco Systems, Inc., 4.950%, due 02/15/19		310,000		317,753
Citigroup, Inc., 5.625%, due 08/27/12		1,640,000		1,686,853
CSX Corp., 5.750%, due 03/15/13		610,000		659,902
General Electric Capital Corp., Series A, 0.373%, due 12/20/131		240,000		227,380
Series A, 3.750%, due 11/14/14		610,000		608,935
Series A, 6.750%, due 03/15/32		2,900,000		2,956,739
Goldman Sachs Group, Inc., 3.625%, due 08/01/12		1,400,000		1,442,427
Hewlett-Packard Co., 6.125%, due 03/01/14		400,000		446,955
JPMorgan Chase & Co., 4.750%, due 05/01/13		1,300,000		1,372,179
Nisource Finance Corp., 7.875%, due 11/15/10		750,000		786,270
ONEOK Partners LP, 8.625%, due 03/01/19		550,000		663,736
Pfizer, Inc., 3.625%, due 06/03/13	EUR	250,000		368,974
Roche Holdings, Inc., 4.625%, due 03/04/13		450,000		681,562
SLM Corp., 0.964%, due 11/15/111		250,000		306,421
UST, Inc., 6.625%, due 07/15/12	$	1,375,000		1,487,610
Verizon Wireless Capital LLC, 7.625%, due 12/19/11	EUR	500,000		788,424

	Face Amount		Value
Wells Fargo & Co., 5.250%, due 10/23/12	$	2,000,000	$	2,135,148
Total United States corporate bonds				22,382,962
Total corporate bonds (cost $57,969,709)				61,304,832
Asset-backed securities: 0.84%
United States: 0.84%
Bank of America Credit Card Trust, Series 2008-A1, Class A1, 0.813%, due 04/15/131		300,000		299,319
Series 2008-A5, Class A5, 1.433%, due 12/16/131		300,000		301,382
Chase Issuance Trust, Series 2007-A16, Class A16, 0.554%, due 06/16/141		300,000		297,816
Series 2009-A3, Class A3, 2.400%, due 06/17/13		390,000		395,879
Total asset-backed securities (cost $1,257,208)				1,294,396
Collateralized debt obligations: 1.04%
Cayman Islands: 0.39%
Avenue CLO Fund Ltd., Series 2006-3A, Class B2L, 4.284%, due 07/20/181,3,4,5		220,000		33,000
Denali Capital CLO VII Ltd., Series 2007-1A, Class B2L, 4.533%, due 01/22/221,3,4,5		290,000		126,498
FM Leveraged Capital Fund, Series 2006-2A, Class E, 4.023%, due 11/15/201,4		400,000		100,000
Galena CDO Ltd., Series II-AIRL, Class A1U, 1.302%, due 04/07/171,3,4,5		1,000,000		188,990
Gresham Street CDO Funding, Series 2003-1X, Class D, 3.524%, due 11/07/331,4		100,000		2,000
Herald Ltd., 3.754%, due 09/16/451,2,4		300,000		0
Kingsland Ltd., Series 2007-5A, Class E, 4.534%, due 07/14/211,3,4,5		250,000		67,500
Trimaran CLO Ltd., Series 2007-1A, Class B2L, 3.654%, due 06/15/111,3,4,5		200,000		92,000
Total Cayman Islands collateralized debt obligations				609,988

10

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Ireland: 0.01%
Valleriite CDO, Series 2007-1A, Class D1EU, 4.248%, due 12/20/171,3,4,5	EUR	350,000	$	16,206
Luxembourg: 0.00%7
Ashwell Rated SA, due 12/22/773,4,5,6	GBP	220,000		3,553
Netherlands: 0.29%
Ares Euro CLO BV, Series 2007-1A, Class E, 4.491%, due 05/15/241,3,4,5	EUR	470,000		116,427
Grosvenor Place CLO BV, Series II-A, Class SUB, 7.500%, due 03/28/233,4,5		530,000		75,978
Harbourmaster CLO Ltd., Series 7A, Class C, 12.000%, due 09/22/223,4,5		300,000		34,405
Highlander Euro CDO, Series 2006-2CA, Class E, due 12/14/223,4,5,6		250,000		114,684
Queen Street CLO, Series 2007-1A, Class F, 6.980%, due 08/15/243,4,5		350,000		100,349
Total Netherlands collateralized debt obligations				441,843
United States: 0.35%
Ajax One Ltd.,
Series 2A, Class C, 2.735%, due 09/08/321,3,4,5	$	500,000		150,000
Axius Europe CLO SA, Series 2007-1A, Class D, 3.991%, due 11/15/231,3,4,5	EUR	350,000		160,558
MC Funding Ltd., Series 2006-1A, Class E, 4.003%, due 12/20/201,3,4,5	$	640,000		224,000
Total United States collateralized debt obligations				534,558
Total collateralized debt obligations (cost $7,652,483)				1,606,148
Commercial mortgage-backed securities: 0.42%
United States: 0.42%
Banc of America Commercial Mortgage, Inc., Series 2006-6, Class A2, 5.309%, due 10/10/45		390,000		391,703

	Face Amount		Value
GS Mortgage Securities Corp. II, Series 2007-GG10, Class A4, 5.805%, due 08/10/451	$	300,000	$	257,594
Total commercial mortgage-backed securities (cost $589,052)				649,297
Mortgage & agency debt securities: 24.89%
United States: 24.89%
Federal Home Loan Bank, 5.250%, due 06/18/14		4,100,000		4,554,735
Federal Home Loan Mortgage Corp.,† 4.750%, due 03/05/12		4,950,000		5,309,504
5.000%, due 02/16/17		8,600,000		9,347,598
Federal Home Loan Mortgage Corp. Gold Pools,† #G04668, 5.000%, due 03/01/38		1,093,201		1,122,296
#G08307, 5.000%, due 11/01/38		1,564,452		1,606,001
Federal National Mortgage Association,† 4.125%, due 04/15/14		4,200,000		4,466,864
5.000%, due 10/15/11		4,470,000		4,777,326
Federal National Mortgage Association Pools,† #992260, 4.000%, due 01/01/39		3,325,576		3,213,684
#933765, 4.500%, due 04/01/38		3,961,882		3,958,976
Total mortgage & agency debt securities (cost $37,336,686)				38,356,984
US government obligation: 3.25%
US Treasury Note, 1.375%, due 03/15/12 (cost $5,014,625)		5,000,000		5,011,330
Non US-government obligations: 16.64%
Belgium: 0.84%
Government of Belgium, 4.000%, due 03/28/14	EUR	850,000		1,291,958
Canada: 1.28%
Quebec Province, 6.125%, due 01/22/11	$	1,880,000		1,979,734

11

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
France: 1.53%
Government of France, 1.800%, due 07/25/40	EUR	1,627,025	$	2,355,816
Germany: 6.25%
Bundesschatzanweisungen, 4.750%, due 06/11/10		1,600,000		2,335,264
Kreditanstalt fuer Wiederaufbau, 3.375%, due 01/16/12	EUR	2,800,000		4,147,713
5.550%, due 06/07/21	GBP	1,800,000		3,149,543
				9,632,520
Greece: 1.39%
Hellenic Republic Government Bond, 4.300%, due 03/20/12	EUR	1,500,000		2,147,659
Italy: 2.12%
Republic of Italy, 4.500%, due 01/21/15	$	1,565,000		1,637,253
4.750%, due 01/25/16		1,565,000		1,626,786
				3,264,039
Japan: 1.96%
Government of Japan, 2.500%, due 09/20/37	JPY	134,000,000		1,516,389
Japan Bank for International Cooperation, 5.250%, due 03/23/16	$	1,400,000		1,511,657
				3,028,046

	Face Amount		Value
Spain: 1.27%
Instituto de Credito Oficial, 5.375%, due 07/02/12	$	1,800,000	$	1,949,378
Total non US-government obligations (cost $24,967,463)				25,649,150
Sovereign/supranational bonds: 4.41%
European Investment Bank, 5.625%, due 10/15/10	EUR	1,200,000		1,783,399
6.250%, due 04/15/14	GBP	1,270,000		2,312,102
Inter-American Development Bank, 3.250%, due 11/15/11	$	2,600,000		2,698,670
Total sovereign/ supranational bonds (cost $6,353,295)				6,794,171
Total bonds (cost $141,140,521)				140,666,308
	Shares
Short-term investment: 3.71%
Investment company: 3.71%
UBS Cash Management Prime Relationship Fund, 0.120%8,9 (cost $5,709,497)		5,709,497		5,709,497
Total investments: 94.98%(cost $146,850,018)				146,375,805
Cash and other assets, less liabilities: 5.02%				7,742,420
Net assets: 100.00%			$	154,118,225

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $146,850,018; and net unrealized depreciation consisted of:

Gross unrealized appreciation	$	6,979,550
Gross unrealized depreciation		(7,453,763	)
Net unrealized depreciation of investments	$	(474,213	)

†  On September 7, 2008, the Federal Housing Finance Agency placed the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation into conservatorship, and the US Treasury guaranteed the debt issued by those organizations.

¹  Floating rate security—The interest rates shown are the current rates as of December 31, 2009.

12

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

²  Security exempt from registration under Regulation S of the Securities Act of 1933. Regulation S applies to securities offerings that are made outside of the United States and do not involve direct selling efforts in the United States. At December 31, 2009, the value of these securities amounted to $5,964,245 or 3.87% of net assets.

³  Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities are considered liquid, unless noted otherwise, and may be resold in transactions exempt from registration, normally to qualified institutional buyers. At December 31, 2009, the value of these securities amounted to $5,720,886 or 3.71% of net assets.

⁴  Security is illiquid. At December 31, 2009, the value of these securities amounted to $1,606,148 or 1.04% of net assets.

⁵  These securities, which represent 0.98% of net assets as of December 31, 2009, are considered restricted. (See restricted securities table below for more information.)

Restricted securities	Acquisition dates	Acquisition cost		Acquisition cost as a percentage of net assets			12/31/09 Market value		12/31/09 Market value as a percentage of net assets
Ajax One Ltd., Series 2A, Class C, 2.735%, due 09/08/32	11/08/05	$	487,550		0.32	%	$	150,000		0.10	%
Ares Euro CLO BV, Series 2007-1A, Class E, 4.491%, due 05/15/24	03/16/07		625,664		0.41			116,427		0.08
Ashwell Rated SA, due 12/22/77	01/29/07		262,586		0.17			3,553		0.00	a
Avenue CLO Fund Ltd., Series 2006-3A, Class B2L, 4.284%, due 07/20/18	04/24/06		216,595		0.14			33,000		0.02
Axius Europe CLO SA, Series 2007-1A, Class D, 3.991%, due 11/15/23	09/28/07		468,023		0.30			160,558		0.10
Denali Capital CLO VII Ltd., Series 2007-1A, Class B2L, 4.533%, due 01/22/22	04/27/07		285,865		0.18			126,498		0.08
Galena CDO Ltd., Series II-AIRL, Class A1U, 1.302%, due 04/07/17	03/08/07		1,000,000		0.65			188,990		0.12
Grosvenor Place CLO BV, Series II-A, Class SUB, 7.500%, due 03/28/23	12/15/06		686,465		0.45			75,978		0.05
Harbourmaster CLO Ltd., Series 7A, Class C, 12.000%, due 09/22/22	10/31/06		367,812		0.24			34,405		0.02
Highlander Euro CDO, Series 2006-2CA, Class E, due 12/14/22	11/28/06		237,841		0.15			114,684		0.08
Kingsland Ltd., Series 2007-5A, Class E, 4.534%, due 07/14/21	05/02/07		243,231		0.16			67,500		0.04
MC Funding Ltd., Series 2006-1A, Class E, 4.003%, due 12/20/20	12/08/06		640,000		0.41			224,000		0.15
Queen Street CLO, Series 2007-1A, Class F, 6.980%, due 08/15/24	05/18/07		463,444		0.30			100,349		0.07
Trimaran CLO Ltd., Series 2007-1A, Class B2L, 3.654%, due 06/15/11	03/09/07		198,806		0.13			92,000		0.06

13

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

Restricted securities	Acquisition dates		Acquisition cost		Acquisition cost as a percentage of net assets			12/31/09 Market value		12/31/09 Market value as a percentage of net assets
Valleriite CDO, Series 2007-1A, Class D1EU, 4.248%, due 12/20/17		06/12/07	$	465,868		0.30	%	$	16,206		0.01	%
			$	6,649,750		4.31	%	$	1,504,148		0.98	%

^a  Amount represents less than 0.005%.

⁶  This security is the equity tranche of a collateralized debt obligation. The Fund receives periodic payments, which may vary, from the issuer of this security.

⁷  Amount represents less than 0.005%.

⁸  Investment in affiliated investment company.

⁹  The rate shown reflects the yield at December 31, 2009.

CDO  Collateralized debt obligations

CLO  Collateralized loan obligations

GS  Goldman Sachs

Forward foreign currency contracts

UBS Absolute Return Bond Fund had the following open forward foreign currency contracts as of December 31, 2009:

	Contracts to deliver		In exchange for		Maturity dates	Unrealized appreciation/ (depreciation)
Euro		47,020,000	USD	70,172,715	01/14/10	$	2,767,194
Great Britain Pound		5,225,000	USD	8,676,551	01/14/10		237,445
Japanese Yen		412,319,680	USD	4,640,000	01/14/10		212,667
Swiss Franc		15,065,000	USD	14,929,840	01/14/10		365,701
United States Dollar		7,239,697	EUR	4,945,000	01/14/10		(150,792	)
United States Dollar		3,350,653	JPY	297,600,000	01/14/10		(155,137	)
United States Dollar		13,186,244	NOK	73,870,000	01/14/10		(432,684	)
United States Dollar		7,840,755	SEK	53,850,000	01/14/10		(313,834	)
United States Dollar		5,267,537	SEK	37,920,000	01/14/10		32,757
Net unrealized appreciation on forward foreign currency contracts						$	2,563,317

Currency type abbreviations:

EUR  Euro

GBP  Great Britain Pound

JPY  Japanese Yen

NOK  Norwegian Krone

SEK  Swedish Krona

USD  United States Dollar

14

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

Futures contracts

UBS Absolute Return Bond Fund had the following open futures contracts as of December 31, 2009:

	Expiration dates	Cost/ (proceeds)			Value			Unrealized appreciation/ (depreciation)
US Treasury futures buy contracts:
US Long Bond, 27 contracts (USD)	March 2010	$	3,264,089		$	3,115,125		$	(148,964	)
US Treasury futures sell contracts:
2 Year US Treasury Notes, 227 contracts (USD)	March 2010		(49,372,141	)		(49,092,297	)		279,844
5 Year US Treasury Notes, 387 contracts (USD)	March 2010		(45,142,319	)		(44,266,148	)		876,171
10 Year US Treasury Notes, 183 contracts (USD)	March 2010		(21,742,398	)		(21,127,922	)		614,476
Interest rate futures buy contracts:
Euro Buxl, 18 contracts (EUR)	March 2010		2,547,398			2,495,753			(51,645	)
Interest rate futures sell contracts:
Euro-Bobl, 165 contracts (EUR)	March 2010		(27,575,105	)		(27,357,725	)		217,380
Euro-Bund, 40 contracts (EUR)	March 2010		(7,060,078	)		(6,949,277	)		110,801
Euro-Schatz, 105 contracts (EUR)	March 2010		(16,263,504	)		(16,250,436	)		13,068
Long Gilt, 32 contracts (GBP)	March 2010		(6,065,172	)		(5,915,508	)		149,664
Net unrealized appreciation on futures contracts								$	2,060,795

Currency type abbreviations:

EUR  Euro

GBP  Great Britain Pound

USD  United States Dollar

Swap agreements

UBS Absolute Return Bond Fund had outstanding credit default swap agreements with the following terms as of December 31, 2009:

Credit default swaps on credit indices—buy protection¹

Counterparty	Notional amount		Termination date		Payments made by the Fund			Payments received by the Fund		Upfront payments (made) received		Value			Unrealized depreciation
Goldman Sachs International	EUR	3,100,000		12/20/13		2.2000	%2		—3	$	—	$	(181,175	)	$	(181,175	)

¹  If the Fund is a buyer of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the Fund will either (i) receive from the seller of protection an amount equal to the notional amount of the swap and take delivery of the referenced obligation or underlying securities comprising the referenced index or (ii) receive a net settlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation or underlying securities comprising the referenced index.

²  Payments made are based on the notional amount.

³  Payment from the counterparty will be received upon the occurrence of a succession event with respect to the iTraxx Europe HiVol Series 10 Index.

15

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

Credit default swaps on corporate and sovereign issues—buy protection¹

Counterparty	Notional amount		Termination date		Payments made by the Fund			Payments received by the Fund		Upfront payments (made) received		Value			Unrealized appreciation
JP Morgan Chase	USD	1,550,000		12/20/14		1.000	%2		—3	$	55,787	$	(48,071	)	$	7,716

¹  If the Fund is a buyer of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the Fund will either (i) receive from the seller of protection an amount equal to the notional amount of the swap and deliver the referenced obligation or (ii) receive a net settlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation.

²  Payments made are based on the notional amount.

³  Payment from the counterparty will be received upon the occurrence of bankruptcy and/or restructuring event with respect to the McKesson HBOC, Inc. 7.650% bond, due 03/01/27.

Credit default swaps on corporate and sovereign issues—sell protection¹

Counterparty	Notional amount		Termination dates	Payments made by the Fund		Payments received by the Fund			Upfront payments (made) received			Value			Unrealized appreciation/ (depreciation)			Credit spread2
Goldman Sachs International	USD	3,000,000	06/20/18		—3		0.5140	%4	$	—		$	(139,783	)	$	(139,783	)		0.8300	%
Goldman Sachs International	USD	2,300,000	12/20/18		—5		1.14254			—			(47,715	)		(47,715	)		0.9800
Goldman Sachs International	USD	3,000,000	09/20/19		—6		1.00004			(19,160	)		23,737			4,577			0.5400
JP Morgan Chase	USD	1,550,000	12/20/14		—7		1.00004			(53,442	)		48,736			(4,706	)		0.2000
									$	(72,602	)	$	(115,025	)	$	(187,627	)

¹  If the Fund is a seller of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the Fund will either (i) pay to the buyer of protection an amount equal to the notional amount of the swap and take delivery of the referenced obligation or (ii) pay a net settlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation.

²  Credit spreads, where available, represented in absolute terms, utilized in determining the market value as of period end serve as an indicator of the current status of the payment/performance risk and represent the likelihood or risk of default for the credit derivative. The credit spread of a particular referenced entity reflects the cost of buying/selling protection and may include upfront payments required to be made to enter into the agreement. Wider credit spreads represent a deterioration of the referenced entity's credit soundness and a greater likelihood of risk of default or other credit event occurring as defined under the terms of the agreement. A credit spread identified as "Defaulted" indicates a credit event has occurred for the referenced entity.

³  Payment to the counterparty will be made upon the occurrence of bankruptcy and/or restructuring event with respect to the Republic of Spain 5.500% bond, due 12/20/17.

⁴  Payments received are based on the notional amount.

⁵  Payment to the counterparty will be made upon the occurrence of bankruptcy and/or restructuring event with respect to the Republic of Poland 5.250% bond, due 01/15/14.

⁶  Payment to the counterparty will be made upon the occurrence of bankruptcy and/or restructuring event with respect to the Republic of Austria 5.250% bond, due 01/14/11.

⁷  Payment to the counterparty will be made upon the occurrence of bankruptcy and/or restructuring event with respect to the Johnson & Johnson 3.800% bond, due 05/15/13.

Currency type abbreviations:

EUR  Euro

USD  United States Dollar

16

UBS Absolute Return Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)
Concluded

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Corporate bonds	$	—	$	61,304,832	$	—	$	61,304,832
Asset-backed securities		—		1,294,396		—		1,294,396
Collateralized debt obligations		—		—		1,606,148		1,606,148
Commercial mortgage-backed securities		—		649,297		—		649,297
Mortgage & agency debt securities		—		38,356,984		—		38,356,984
US government obligation		—		5,011,330		—		5,011,330
Non US-government obligations		—		25,649,150		—		25,649,150
Sovereign/supranational bonds		—		6,794,171		—		6,794,171
Short-term investment		—		5,709,497		—		5,709,497
Other financial instruments1		2,060,795		2,202,231		—		4,263,026
Total	$	2,060,795	$	146,971,888	$	1,606,148	$	150,638,831

¹  Other financial instruments may include open futures contracts, swap agreements, options and forward foreign currency contracts.

Level 3 Rollforward Disclosure

The following is a rollforward of the Fund's investments that were valued using unobservable inputs for the period:

Measurements using unobservable inputs (Level 3)
	Collateralized debt obligations			Total
Assets
Beginning balance	$	542,156		$	542,156
Total gains or losses (realized/unrealized) included in earnings		1,086,321			1,086,321
Purchases, sales, issuances, and settlements (net)		(22,329	)		(22,329	)
Transfers in and/or out of Level 3		—			—
Ending balance	$	1,606,148		$	1,606,148
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to investments still held at 12/31/09.	$	1,073,605		$	1,073,605

See accompanying notes to financial statements.
17

UBS Global Bond Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS Global Bond Fund (the "Fund") returned 7.76% (Class A shares returned 2.85% after the deduction of the maximum sales charge), while Class Y shares returned 7.93%. The Fund's benchmark, the Barclays Capital Global Aggregate Bond Index (the "Index"), returned 5.33% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 20; please note that the Fund's returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect fees and expenses.)

The Fund's outperformance was due to a variety of factors, including our spread management, country allocations, sector positioning, duration and currency management.

Portfolio performance summary¹

What worked

•  Spread management was rewarded. Spread management—the allocation of assets among non-government sectors of the fixed income market—was a significant positive contributor to the Fund's performance during the six-month period.

•  A number of country allocation decisions aided our results.

  – Early in the reporting period, we had overweight exposures to several peripheral European sovereign bond markets, including Italy. This added value as their spreads² narrowed more than their core European market counterparts.

  – An overweight to Japanese inflation-linked securities was rewarded as the country emerged from its recession during the period.

•  The Fund's duration positioning was, overall positive for performance. The Fund's duration (which is a measure of a portfolio's sensitivity to changes in interest rates) was actively managed during the reporting period. When the six-month period began, the Fund had an overall short duration. During the third quarter of 2009, we adjusted the Fund's duration to be even shorter than that of the benchmark. This was rewarded, as interest rates moved sharply higher in December.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

²  The spread is the difference between the yield paid on US Treasury bonds and higher risk securities.

18

UBS Global Bond Fund

•  Sector positioning was an overall positive for performance.

  – Continuing the trend that began earlier in the year, corporate bond spreads further narrowed during the reporting period as investor risk aversion abated. Having an overweight to investment grade corporate bonds was a positive for performance as corporate bonds substantially outperformed government securities. In particular, the Fund's holdings in the financial sector boosted its returns.

  – The Fund's securitized exposure benefited performance, including our asset-backed securities (ABS) and collateralized debt obligations (CDOs). In each case, their spreads narrowed from their elevated levels seen earlier in the year.

•  Active currency management was beneficial. During the six month period our overweights to the USdollar and Swedish krona contributed to results, as did our underweights to the Japanese yen and the euro.

What didn't work

•  Toward the end of the review period, the Fund's active curve positioning detracted from performance. The Fund was positioned to benefit from flattening yield curves; however, yield curves generally steepened over the period.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

19

UBS Global Bond Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		7.76	%		6.47	%		(0.06	)%	N/A				4.47	%
Class B3		7.34	%		5.67	%		(0.83	)%	N/A				4.28	%6
Class C4		7.66	%		5.97	%		(0.55	)%	N/A				3.40	%
Class Y5		7.93	%		6.78	%		0.19	%		4.23	%		4.71	%
After deducting maximum sales charge
Class A2		2.85	%		1.63	%		(0.99	)%	N/A				3.89	%
Class B3		2.34	%		0.67	%		(1.13	)%	N/A				4.28	%6
Class C4		6.91	%		5.22	%		(0.55	)%	N/A				3.40	%
Barclays Capital Global Aggregate Index7		5.33	%		6.93	%		4.56	%		6.49	%		6.32	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.68% and 1.15%; Class B—2.55% and 1.90%; Class C—2.17% and 1.65%; Class Y—1.44% and 0.90%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses.

The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred through investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.15% for Class A shares, 1.90% for Class B shares, 1.65% for Class C shares and 0.90% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to excee d any applicable expense limit that is in place for the Fund.

¹  Inception date of UBS Global Bond Fund Class A shares is November 5, 2001. Inception dates of Class B and Class C shares are November 26, 2001 and July 2, 2002, respectively. Inception date of Class Y shares and the index is July 31, 1993.

²  Maximum sales charge for Class A shares is 4.50%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 0.75% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Portfolio offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The Barclays Capital Global Aggregate Index (formerly known as the Lehman Brothers Global Aggregate Index) is a broad-based, market capitalization weighted index which measures the broad global markets for US and non US corporate, government, governmental agency, supranational, mortgage-backed and asset-backed fixed income securities. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

20

UBS Global Bond Fund

Top ten fixed income holdings (unaudited)

As of December 31, 2009

	Percentage of net assets
Government of Japan CPI Linked Bond, 1.200%, due 06/10/17		5.8	%
Bundesrepublik Deutschland, 5.375%, due 01/04/10		5.6
Buoni Poliennali Del Tesoro, 5.000%, due 08/01/39		4.5
Bundesrepublik Deutschland, 5.250%, due 07/04/10		4.2
Instituto de Credito Oficial, 5.375%, due 07/02/12		3.1
Government of Japan, 1.900%, due 06/20/25		3.1
Government of Japan, 1.300%, due 03/20/15		3.1
Government of Japan, 0.800%, due 03/20/13		2.8
Bundesschatzanweisungen, 4.750%, due 06/11/10		2.8
Government of Japan, 1.800%, due 06/20/17		2.7
Total		37.7	%

Country exposure, top five (unaudited)

As of December 31, 2009

	Percentage of net assets
United States		31.4	%
Germany		22.1
Japan		17.5
Italy		7.4
Spain		6.8
Total		85.2	%

21

UBS Global Bond Fund

Industry diversification (unaudited)

As a percentage of net assets as of December 31, 2009

Bonds
Corporate bonds
Commercial banks	10.73	%
Diversified financial services	5.03
Diversified telecommunication services	2.25
Electric utilities	0.33
Financial	0.26
Food & staples retailing	2.40
Food products	0.88
Media	1.81
Metals & mining	0.50
Oil, gas & consumable fuels	3.13
Personal products	0.99
Thrifts & mortgage finance	3.98
Tobacco	2.34
Total corporate bonds	34.63	%
Asset-backed securities	0.18
Collateralized debt obligations	1.84
Commercial mortgage-backed securities	1.72
Mortgage & agency debt securities	9.84
US government obligations	2.62
Non-US government obligations	47.55
Sovereign/supranational bond	2.18
Total bonds	100.56	%
Total investments	100.56
Liabilities, in excess of cash and other assets	(0.56	)
Net assets	100.00	%

22

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Bonds: 100.56%
Corporate bonds: 34.63%
Australia: 0.79%
Rio Tinto Finance USA Ltd., 8.950%, due 05/01/14	$	100,000	$	119,830
Westpac Banking Corp., 4.200%, due 02/27/15		70,000		71,153
Total Australia corporate bonds				190,983
France: 1.47%
Compagnie de Financement Foncier, 4.000%, due 07/21/11	EUR	150,000		222,648
France Telecom SA, 8.500%, due 03/01/31	$	100,000		133,081
Total France corporate bonds				355,729
Germany: 6.30%
Bayerische Landesbank, 3.750%, due 05/23/11	EUR	240,000		354,616
Dexia Kommunalbank Deutschland AG, 3.500%, due 04/15/11		250,000		367,087
Hypothekenbank in Essen AG, 4.000%, due 11/21/11		240,000		357,105
Kreditanstalt fuer Wiederaufbau, 5.500%, due 12/07/15	GBP	250,000		444,877
Total Germany corporate bonds				1,523,685
Italy: 1.25%
Telecom Italia SpA, 1.510%, due 06/07/161	EUR	100,000		133,159
5.625%, due 12/29/15	GBP	50,000		82,218
8.250%, due 03/21/16	EUR	50,000		87,015
Total Italy corporate bonds				302,392
Jersey (Channel Islands): 0.69%
Travelers Insurance Company Institutional Funding Ltd., 5.750%, due 12/06/11	GBP	100,000		167,464
Luxembourg: 0.33%
Enel Finance International SA, 5.625%, due 08/14/24	GBP	50,000		79,034
Netherlands: 0.34%
Rabobank Nederland NV, 4.000%, due 09/10/15	GBP	50,000		81,547

	Face Amount		Value
Norway: 1.01%
StatoilHydro ASA, 5.250%, due 04/15/19	$	230,000	$	243,788
Qatar: 0.45%
Qtel International Finance Ltd., 6.500%, due 06/10/142	$	100,000		108,140
South Korea: 0.43%
Hyundai Capital Services, Inc., 6.000%, due 05/05/152	$	100,000		104,417
Spain: 1.27%
Caja de Ahorros y Monte de Piedad de Madrid, 4.125%, due 03/24/36	EUR	250,000		307,604
United Kingdom: 3.64%
Barclays Bank PLC, 7.500%, due 12/15/101,3	EUR	75,000		103,216
Imperial Tobacco Finance PLC, 8.375%, due 02/17/16		150,000		260,177
Nationwide Building Society, 0.930%, due 12/22/161		200,000		236,901
WPP PLC, 6.625%, due 05/12/16		180,000		279,208
Total United Kingdom corporate bonds				879,502
United States: 16.66%
Altria Group, Inc., 9.250%, due 08/06/19	$	250,000		304,657
American Honda Finance Corp., 3.875%, due 09/16/14	EUR	50,000		73,020
Anadarko Petroleum Corp., 5.750%, due 06/15/14	$	100,000		108,366
Avon Products, Inc., 5.625%, due 03/01/14		220,000		239,777
Bank of America Corp., 7.375%, due 05/15/14		200,000		226,943
Bear Stearns Cos. LLC, 5.700%, due 11/15/14		300,000		330,100
BNP Paribas Capital Trust III, 6.625%, due 10/23/111,3	EUR	175,000		234,565
Citigroup, Inc., 4.750%, due 05/31/171,4		50,000		62,128
5.625%, due 08/27/12	$	150,000		154,285

23

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Comcast Cable Communications LLC, 6.750%, due 01/30/11	$	150,000	$	158,305
General Electric Capital Corp., Series A, 6.750%, due 03/15/32		110,000		112,152
HSBC Finance Corp., 6.750%, due 05/15/11		350,000		369,907
Kinder Morgan Energy Partners LP, 5.800%, due 03/15/35		175,000		162,136
Kraft Foods, Inc., 5.625%, due 11/01/11		200,000		212,413
Kroger Co., 8.050%, due 02/01/10		350,000		351,914
Morgan Stanley, 5.450%, due 01/09/17		250,000		252,679
ONEOK Partners LP, 8.625%, due 03/01/19		200,000		241,359
SanPaolo IMI Capital, 8.126%, due 11/10/101,3	EUR	100,000		141,205
SLM Corp., 0.964%, due 11/15/111		50,000		61,284
Wal-Mart Stores, Inc., 4.875%, due 01/19/39	GBP	150,000		228,245
Total United States corporate bonds				4,025,440
Total corporate bonds (cost $7,950,147)				8,369,725
Asset-backed securities: 0.18%
United Kingdom: 0.12%
Whinstone Capital Management Ltd., Series 1A,Class B2, 1.633%, due 10/25/441	EUR	77,108		27,635
United States: 0.06%
Merrill Lynch Mortgage Investors, Inc., Series 2006-SL1, Class A, 0.411%, due 09/25/361	$	44,942		14,832
Total asset-backed securities (cost $136,140)				42,467
Collateralized debt obligations: 1.84%
Cayman Islands: 0.18%
Black Diamond CLO Ltd., Series 2005-2X, Class IN, due 01/07/185,6	$	100,000		21,000

	Face Amount		Value
Gulf Stream - Sextant CLO Ltd., Series 2007-1A, Class SUB, due 06/17/212,5,6,7	$	100,000	$	22,000
Total Cayman Islands collateralized debt obligations				43,000
Ireland: 0.27%
Valleriite CDO, Series 2007-1A, Class A1EU, 1.598%, due 12/29/171,2,6,7	EUR	160,000		65,943
Netherlands: 0.92%
Queen Street CLO, Series 2006-1A, Class C1, 1.624%, due 04/15/231,2,6,7	EUR	250,000		193,924
Series 2007-1A, Class F, 6.980%, due 08/15/242,6,7		100,000		28,671
Total Netherlands collateralized debt obligations				222,595
United States: 0.47%
Hewett's Island CDO Ltd., Series 2007-6A, Class D, 2.507%, due 06/09/191,2,6,7	$	250,000		112,500
Total collateralized debt obligations (cost $1,116,675)				444,038
Commercial mortgage-backed securities: 1.72%
United States: 1.72%
Bear Stearns Commercial Mortgage Securities Trust, Series 2000-WF2, Class A2, 7.320%, due 10/15/321		63,041		64,278
GS Mortgage Securities Corp. II, Series 2007-GG10, Class A4, 5.805%, due 08/10/451		25,000		21,466
JPMorgan Chase Commercial Alternative Mortgage Product, Series 2006-CB17, Class A4, 5.429%, due 12/12/43		350,000		330,626
Total commercial mortgage-backed securities (cost $421,916)				416,370
Mortgage & agency debt securities: 9.84%
United States: 9.84%
Federal Home Loan Mortgage Corp. Gold Pools,† #G04461, 5.000%, due 07/01/38		235,465		241,719

24

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Federal National Mortgage Association Pools,† #AA5244, 4.000%, due 05/01/39	$	74,157	$	71,662
#909356, 5.000%, due 02/01/37		252,242		259,192
#914467, 5.000%, due 04/01/37		210,930		216,708
#915829, 5.500%, due 03/01/37		236,243		247,563
#928197, 5.500%, due 03/01/37		212,630		222,818
#968197, 5.500%, due 01/01/38		221,813		232,442
#AC1466, 5.500%, due 08/01/39		222,520		233,147
#900568, 6.000%, due 09/01/36		127,404		135,327
#940642, 6.000%, due 08/01/37		211,137		223,971
#889579, 6.000%, due 05/01/38		211,970		224,854
Government National Mortgage Association Pools, #781276, 6.500%, due 04/15/31		62,686		67,806
Total mortgage & agency debt securities (cost $2,274,066)				2,377,209
US government obligations: 2.62%
US Treasury Bonds, 4.250%, due 05/15/39		440,000		412,775
US Treasury Notes, 1.375%, due 02/15/12		220,000		220,636
				633,411
Total US government obligations (cost $658,956)				633,411
Non-US government obligations: 47.55%
Germany: 15.84%
Bundesobligation, 4.000%, due 10/11/13	EUR	155,000		237,268
Bundesrepublik Deutschland, 5.000%, due 07/04/11		350,000		530,693
5.250%, due 07/04/10		700,000		1,026,806
5.375%, due 01/04/10		950,000		1,362,533
Bundesschatzanweisungen, 4.750%, due 06/11/10		460,000		671,388
				3,828,688

	Face Amount		Value
Greece: 1.78%
Hellenic Republic Government Bond, 4.300%, due 03/20/12	EUR	300,000	$	429,532
Italy: 6.13%
Buoni Poliennali Del Tesoro, 5.000%, due 08/01/39	EUR	725,000		1,077,041
Republic of Italy, 4.750%, due 01/25/16	$	390,000		405,397
				1,482,438
Japan: 17.49%
Government of Japan, 0.800%, due 03/20/13	JPY	62,950,000		687,538
1.300%, due 03/20/15		66,050,000		737,010
1.800%, due 06/20/17		57,000,000		653,044
1.900%, due 06/20/25		68,800,000		745,761
Government of Japan CPI Linked Bond, 1.200%, due 06/10/17		135,876,000		1,403,913
				4,227,266
Spain: 5.56%
Government of Spain, 4.200%, due 07/30/13	EUR	225,000		341,250
6.000%, due 01/31/29		145,000		243,503
Instituto de Credito Oficial, 5.375%, due 07/02/12	$	700,000		758,092
				1,342,845
United Kingdom: 0.75%
UK Gilts, 5.000%, due 03/07/12	GBP	105,000		181,997
Total non US-government obligations (cost $10,940,087)				11,492,766
Sovereign/supranational bond: 2.18%
European Investment Bank, 6.250%, due 04/15/14 (cost $588,222)	GBP	290,000		527,960
Total bonds (cost $24,086,209)				24,303,946
Total investments: 100.56% (cost $24,086,209)				24,303,946
Liabilities, in excess of cash and other assets: (0.56%)				(134,504	)
Net assets: 100.00%			$	24,169,442

25

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $24,086,209; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	1,304,794
Gross unrealized depreciation		(1,087,057	)
Net unrealized appreciation of investments	$	217,737

†  On September 7, 2008, the Federal Housing Finance Agency placed the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation into conservatorship, and the US Treasury guaranteed the debt issued by those organizations.

¹  Floating rate security—The interest rates shown are the current rates as of December 31, 2009.

²  Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities are considered liquid, unless noted otherwise, and may be resold in transactions exempt from registration, normally to qualified institutional buyers. At December 31, 2009, the value of these securities amounted to $631,872 or 2.61% of net assets.

³  Perpetual bond security. The maturity date reflects the next call date.

⁴  Step bond—Coupon rate increases in increments to maturity. Rate disclosed is as of December 31, 2009. Maturity date disclosed is the ultimate maturity date.

⁵  This security is the equity tranche of a collateralized debt obligation. The Fund receives periodic payments, which may vary, from the issuer of this security.

⁶  Security is illiquid. At December 31, 2009, the value of these securities amounted to $444,038 or 1.84% of net assets.

⁷  These securities, which represent 1.75% of net assets as of December 31, 2009, are considered restricted. (See restricted securities table below for more information.)

Restricted securities	Acquisition dates	Acquisition cost		Acquisition cost as a percentage of net assets			12/31/09 Market value		12/31/09 Market value as a percentage of net assets
Gulf Stream - Sextant CLO Ltd., Series 2007-1A, Class SUB, due 06/17/21	05/17/07	$	100,000		0.41	%	$	22,000		0.09	%
Hewett's Island CDO Ltd.,	05/09/07		243,459		1.01			110,678		0.46
Series 2007-6A, Class D,	06/25/09		2,221		0.01			999		0.00	a
2.507%, due 06/09/19	09/25/09		1,828		0.01			823		0.00	a
Queen Street CLO, Series 2006-1A, Class C1, 1.624%, due 04/15/23	12/21/06		245,895		1.02			193,924		0.80
Series 2007-1A, Class F, 6.980%, due 08/15/24	05/18/07		98,000		0.40			28,671		0.12
Valleriite CDO, Series 2007-1A, Class AIEU, 1.598%, due 12/29/17	06/12/07		160,000		0.66			65,943		0.27
		$	851,403		3.52	%	$	423,038		1.75	%

^a  Amount represents less than 0.005%.

CDO  Collateralized debt obligations

CLO  Collateralized loan obligations

CPI  Consumer price index

GS  Goldman Sachs

Currency type abbreviations:

EUR  Euro

GBP  Great Britain Pound

JPY  Japanese Yen

26

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

Forward foreign currency contracts

UBS Global Bond Fund had the following open forward foreign currency contracts as of December 31, 2009:

	Contracts to deliver		In exchange for		Maturity dates	Unrealized appreciation/ (depreciation)
Euro		505,000	USD	722,150	01/05/10	$	(1,793	)
Euro		1,865,000	USD	2,811,599	03/03/10		138,197
Great Britain Pound		670,000	USD	1,113,090	03/03/10		31,221
Japanese Yen		24,400,000	USD	263,892	01/05/10		1,907
Japanese Yen		45,000,000	USD	513,107	03/03/10		29,803
Swedish Krona		1,080,000	USD	151,850	03/03/10		854
United States Dollar		611,833	AUD	665,000	03/03/10		(17,915	)
United States Dollar		778,362	CAD	815,000	03/03/10		908
United States Dollar		275,157	DKK	1,360,000	03/03/10		(13,336	)
United States Dollar		428,283	EUR	300,000	03/03/10		1,755
United States Dollar		472,937	EUR	320,000	03/03/10		(14,230	)
United States Dollar		251,071	GBP	155,000	03/03/10		(788	)
United States Dollar		95,636	GBP	60,000	03/03/10		1,247
United States Dollar		269,885	JPY	24,200,000	03/03/10		(9,974	)
United States Dollar		292,211	KRW	338,000,000	03/03/10		(2,449	)
United States Dollar		1,049,168	SEK	7,190,000	03/03/10		(43,921	)
Net unrealized appreciation on forward foreign currency contracts						$	101,486

Currency type abbreviations:

AUD  Australian Dollar

CAD  Canadian Dollar

DKK  Danish Krone

EUR  Euro

GBP  Great Britain Pound

JPY  Japanese Yen

KRW  Korean Won

SEK  Swedish Krona

USD  United States Dollar

Futures contracts

UBS Global Bond Fund had the following open futures contracts as of December 31, 2009:

	Expiration dates	Cost/ (proceeds)			Value			Unrealized appreciation/ (depreciation)
US Treasury futures buy contracts:
US Long Bond, 7 contracts (USD)	March 2010	$	846,245		$	807,625		$	(38,620	)
US Treasury futures sell contracts:
5 Year US Treasury Notes, 16 contracts (USD)	March 2010		(1,866,349	)		(1,830,125	)		36,224
Net unrealized depreciation on futures contracts								$	(2,396	)

Currency type abbreviations:

USD  United States Dollar

27

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

UBS Global Bond Fund had outstanding credit default swap agreements with the following terms as of December 31, 2009:

Credit default swaps on corporate and sovereign issues—buy protection¹

Counterparty	Notional amount		Termination date	Payments made by the Fund			Payments received by the Fund		Upfront payments (made) received		Value			Unrealized depreciation
Deutsche Bank AG	EUR	250,000	12/20/13		1.6000	%2		—3	$	—	$	(14,118	)	$	(14,118	)
Deutsche Bank AG	EUR	250,000	12/20/13		0.95002			—4		—		(6,023	)		(6,023	)
Goldman Sachs International	EUR	250,000	12/20/13		1.05002			—5		—		(8,731	)		(8,731	)
									$	—	$	(28,872	)	$	(28,872	)

¹  If the Fund is a buyer of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the Fund will either (i) receive from the seller of protection an amount equal to the notional amount of the swap and deliver the referenced obligation or (ii) receive a net settlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation.

²  Payments made are based on the notional amount.

³  Payment from the counterparty will be received upon the occurrence of bankruptcy and/or restructuring event with respect to the Deutsche Telecom 8.125% bond, due 05/29/12.

⁴  Payment from the counterparty will be received upon the occurrence of bankruptcy and/or restructuring event with respect to the Akzo Nobel NV 4.250% bond, due 06/14/11.

⁵  Payment from the counterparty will be received upon the occurrence of bankruptcy and/or restructuring event with respect to the Henkel AG & Co KGaA 4.250% bond, due 06/10/13.

Credit default swaps on corporate and sovereign issues—sell protection¹

Counterparty	Notional amount		Termination dates	Payments made by the Fund		Payments received by the Fund			Upfront payments made (received)		Value			Unrealized appreciation/ (depreciation)			Credit spread2
Goldman Sachs International	EUR	280,000	12/20/18		—4		1.2600	%3	$	—	$	3,109		$	3,109			0.7800	%
JPMorgan Chase Bank	USD	700,000	12/20/18		—5		0.47003			—		(36,682	)		(36,682	)		0.8300
									$	—	$	(33,573	)	$	(33,573	)

¹  If the Fund is a seller of protection and a credit event occurs, as defined under the terms of that particular swap agreement, the Fund will either (i) pay to the buyer of protection an amount equal to the notional amount of the swap and take delivery of the referenced obligation or (ii) pay a net settlement amount in the form of cash or securities equal to the notional amount of the swap less the recovery value of the referenced obligation.

²  Credit spreads, where available, represented in absolute terms, utilized in determining the market value as of period end serve as an indicator of the current status of the payment/performance risk and represent the likelihood or risk of default for the credit derivative. The credit spread of a particular referenced entity reflects the cost of buying/selling protection and may include upfront payments required to be made to enter into the agreement. Wider credit spreads represent a deterioration of the referenced entity's credit soundness and a greater likelihood of risk of default or other credit event occurring as defined under the terms of the agreement. A credit spread identified as "Defaulted" indicates a credit event has occurred for the referenced entity.

³  Payments received are based on the notional amount.

⁴  Payment to the counterparty will be made upon the occurrence of bankruptcy and/or restructuring event with respect to the Republic of Italy 6.875% bond, due 09/27/23.

⁵  Payment to the counterparty will be made upon the occurrence of bankruptcy and/or restructuring event with respect to the Republic of Spain 5.500% bond, due 12/20/17.

28

UBS Global Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)
Concluded

Currency type abbreviations:

EUR  Euro

USD  United States Dollar

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)			Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Corporate bonds	$	—		$	8,369,725	$	—	$	8,369,725
Asset-backed securities		—			42,467		—		42,467
Collateralized debt obligations		—			—		444,038		444,038
Commercial mortgage-backed securities		—			416,370		—		416,370
Mortgage & agency debt securities		—			2,377,209		—		2,377,209
US government obligations		—			633,411		—		633,411
Non-US government obligations		—			11,492,766		—		11,492,766
Sovereign/supranational bond		—			527,960		—		527,960
Other financial instruments1		(2,396	)		39,041		—		36,645
Total	$	(2,396	)	$	23,898,949	$	444,038	$	24,340,591

¹  Other financial instruments may include open futures contracts, swap agreements, options and forward foreign currency contracts.

Level 3 Rollforward Disclosure

The following is a rollforward of the Fund's investments that were valued using unobservable inputs for the period:

Measurements using unobservable inputs (Level 3)
	Collateralized debt obligations		Total
Assets
Beginning balance	$	105,822	$	105,822
Total gains or losses (realized/unrealized) included in earnings		338,216		338,216
Purchases, sales, issuances, and settlements (net)		—		—
Transfers in and/or out of Level 3		—		—
Ending balance	$	444,038	$	444,038
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to investments still held at 12/31/09.	$	338,175	$	338,175

See accompanying notes to financial statements.
29

UBS High Yield Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS High Yield Fund (the "Fund") returned 20.89% (Class A shares gained 15.52% after the deduction of the maximum sales charge), while Class Y shares returned 20.88%. The Fund's benchmark, the Merrill Lynch US High Yield Cash Pay Constrained Index (the "Index"), returned 21.10% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 32; please note that the Fund's returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect fees and expenses.)

The Fund generated a strong absolute return during the reporting period, and performed largely in line with its benchmark.

Portfolio performance summary¹

What worked

•  Positioning in a number of sectors positively contributed to performance during the reporting period.

  – Financials was among the best performing sectors in the benchmark during the reporting period. Strong security selection in this area benefited Fund performance, as did moving from a neutral position in the sector, to an overweight one versus the benchmark.

  – Increasing the Fund's exposure from a neutral to overweight position in the technology sector was also rewarded. In particular, we emphasized software companies. This positively contributed to performance as they generated strong results during the period.

  – An overweight in broadcasting was a positive for performance, as was security selection in gaming.

  – An underweight to the cable sector added value as the sector lagged the benchmark during the reporting period.

What didn't work

•  Our exposures in certain sectors detracted from relative results.

  – While our overweight in broadcasting was additive to performance, this positive outcome was offset by security selection in the sector. While we emphasized higher quality names, they lagged their lower quality counterparts during the period.

  – As mentioned, our security selection in gaming benefited the Fund's results. However, this positive was mitigated by our overweight position to the sector, when the sector as a whole underperformed the benchmark.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

30

UBS High Yield Fund

•  An underweight to distressed securities was a negative for relative performance.

  – We maintained an underweight to distressed securities given our concerns that their default rates may remain elevated. Overall, this positioning detracted from relative performance as investors' appetite for riskier assets remained robust. During the six-month reporting period, the distressed sector gained roughly 29%. In contrast, less risky B-rated bonds gained approximately 20% over the same period.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

31

UBS High Yield Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		20.89	%		44.55	%		4.17	%		5.16	%		5.10	%
Class B3		20.43	%		43.14	%		3.37	%		N/A			6.44	%6
Class C4		20.59	%		43.50	%		3.62	%		N/A			6.51	%
Class Y5		20.88	%		44.50	%		4.42	%		5.44	%		5.66	%
After deducting maximum sales charge
Class A2		15.52	%		38.18	%		3.22	%		4.68	%		4.67	%
Class B3		15.43	%		38.14	%		3.09	%		N/A			6.44	%6
Class C4		19.84	%		42.75	%		3.62	%		N/A			6.51	%
Merrill Lynch US High Yield Cash Pay Constrained Index7		21.10	%		56.78	%		6.24	%		6.89	%		6.24	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.33% and 1.20%; Class B—2.15% and 1.95%; Class C—1.86% and 1.70%; Class Y—1.06% and 0.95%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred through investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.20% for Class A shares, 1.95% for Class B shares, 1.70% for Class C shares and 0.95% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund.

¹  Inception date of UBS High Yield Fund Class A shares is December 31, 1998. Inception date of Class B and Class C shares is November 7, 2001. Inception date of Class Y shares and the index is September 30, 1997.

²  Maximum sales charge for Class A shares is 4.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 0.75% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Portfolio offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The Merrill Lynch US High Yield Cash Pay Constrained Index is an index of publicly placed non-convertible, coupon-bearing US dollar denominated below investment grade corporate debt with a term to maturity of at least one year. The index is market weighted, so that larger bond issuers have a greater effect on the index's return. However, the representation of any single bond issue is restricted to a maximum of 2% of the total index. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

32

UBS High Yield Fund

Top ten fixed income holdings (unaudited)

As of December 31, 2009

	Percentage of net assets
First Data Corp., 9.875%, due 09/24/15		1.5	%
Ford Motor Credit Co. LLC, 9.875%, due 08/10/11		1.4
FireKeepers Development Authority, 13.875%, due 05/01/15		1.3
Mirant Americas Generation LLC, 9.125%, due 05/01/31		1.1
Tube City IMS Corp., 9.750%, due 02/01/15		1.1
Teck Resources Ltd., 10.250%, due 05/15/16		1.1
Chesapeake Energy Corp., 7.250%, due 12/15/18		1.1
HCA, Inc., 9.125%, due 11/15/14		1.1
SunGard Data Systems, Inc., 10.250%, due 08/15/15		1.0
Intelsat Jackson Holdings Ltd., 11.250%, due 06/15/16		0.9
Total		11.6	%

33

UBS High Yield Fund

Industry diversification (unaudited)

As a percentage of net assets as of December 31, 2009

Bonds
Corporate bonds
Aerospace/defense	1.10	%
Airlines	0.37
Apparel/textiles	0.48
Auto loans	1.52
Auto parts & equipment	0.86
Automakers	1.20
Banking	4.57
Beverage	0.56
Brokerage	0.58
Building & construction	1.83
Building materials	1.78
Chemicals	1.33
Consumer/commercial lease financing	2.86
Consumer—products	1.07
Diversified capital goods	1.78
Electric—generation	4.60
Electric—integrated	0.90
Electronics	1.43
Energy—exploration & production	4.69
Environmental	0.28
Food—wholesale	1.36
Food & drug retailers	1.92
Forestry/paper	2.33
Gaming	6.70
Gas distribution	4.22
Health services	5.33
Hotels	0.35
Investments & misc financial services	0.24
Leisure	0.39
Life/health insurance	0.17
Machinery	0.51
Media—broadcast	2.26
Media—services	2.02
Media—cable	1.57
Metals/mining excluding steel	3.24
Multi-line insurance	2.11
Non-food & drug retailers	3.23
Oil field equipment & services	1.56	%
Oil refining & marketing	0.09
Packaging	1.97
Pharmaceuticals	1.48
Printing & publishing	2.30
Property & casualty insurance	0.83
Real estate development & management	0.42
Real estate investment trust (REIT)	0.52
Restaurants	0.14
Software/services	3.18
Steel producers/products	2.05
Support—services	2.75
Technology	0.19
Telecom—integrated/services	3.31
Telecom—wireless	3.47
Theaters & entertainment	0.32
Transportation excluding air/rail	1.20
Total corporate bonds	97.52	%
Asset-backed securities	0.15
Commercial mortgage-backed security	0.05
Total bonds	97.72	%
Common stocks
Hotels, restaurants & leisure	0.00
Media—cable	0.05
Printing & publishing	0.00
Total common stocks	0.05	%
Preferred stock
Media—broadcast	0.001
Warrants	0.001
Short-term investment	0.02
Total investments	97.79	%
Cash and other assets, less liabilities	2.21
Net assets	100.00	%

¹  Amount represents less than 0.005%.

34

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Bonds: 97.72%
Corporate bonds: 97.52%
Bermuda: 1.49%
Intelsat Bermuda Ltd., 11.250%, due 02/04/171	$	300,000	$	300,750
Intelsat Jackson Holdings Ltd., 11.250%, due 06/15/16		777,000		841,103
Ship Finance International Ltd., 8.500%, due 12/15/13		190,000		179,312
Total Bermuda corporate bonds				1,321,165
Canada: 3.10%
Bombardier, Inc., 6.750%, due 05/01/121		230,000		237,475
Cascades, Inc., 7.750%, due 12/15/171		75,000		75,750
Nova Chemicals Corp., 8.625%, due 11/01/191		150,000		152,625
Novelis, Inc., 7.250%, due 02/15/15		200,000		190,500
OPTI Canada, Inc., 8.250%, due 12/15/14		175,000		144,156
9.000%, due 12/15/121		150,000		153,375
Reliance Intermediate Holdings LP, 9.500%, due 12/15/191		200,000		208,250
Teck Resources Ltd., 10.250%, due 05/15/16		825,000		961,125
10.750%, due 05/15/19		525,000		627,375
Total Canada corporate bonds				2,750,631
Cayman Islands: 0.21%
XL Capital Ltd., Series E, 6.500%, due 04/15/172,3		250,000		188,750
France: 0.13%
Cie Generale de Geophysique-Veritas, 7.750%, due 05/15/17		115,000		114,138
Germany: 0.09%
UPC Germany GmbH, 8.125%, due 12/01/171		75,000		75,844
Ireland: 0.13%
Elan Corp. PLC, 8.750%, due 10/15/161		125,000		119,375

	Face Amount		Value
Liberia: 0.39%
Royal Caribbean Cruises Ltd., 6.875%, due 12/01/13	$	230,000	$	225,975
7.500%, due 10/15/27		150,000		123,562
Total Liberia corporate bonds				349,537
Luxembourg: 1.23%
Evraz Group SA, 9.500%, due 04/24/181		200,000		199,000
Expro Finance Luxembourg SCA, 8.500%, due 12/15/161		205,000		203,463
Steel Capital SA, 9.750%, due 07/29/131		125,000		125,937
Wind Acquisition Finance SA, 11.750%, due 07/15/171		270,000		294,975
12.000%, due 12/01/151		250,000		267,500
Total Luxembourg corporate bonds				1,090,875
Netherlands: 0.35%
ING Groep NV, 5.775%, due 12/08/152,3		240,000		177,286
NXP BV, 7.875%, due 10/15/14		150,000		136,125
Total Netherlands corporate bonds				313,411
United Kingdom: 1.71%
Global Aviation Holdings Ltd., 14.000%, due 08/15/131		175,000		173,906
Global Crossing UK Finance PLC, 10.750%, due 12/15/14		200,000		205,000
Hanson Ltd., 6.125%, due 08/15/16		200,000		191,000
HBOS Capital Funding LP, 6.071%, due 06/30/141,2,3		185,000		120,250
Ineos Group Holdings PLC, 8.500%, due 02/15/161		230,000		154,675
Royal Bank of Scotland Group PLC, Series U, 7.640%, due 09/29/172,3		850,000		459,000
Vedanta Resources PLC, 9.500%, due 07/18/181		100,000		101,500
Virgin Media Finance PLC, Series 1, 9.500%, due 08/15/16		100,000		107,375
Total United Kingdom corporate bonds				1,512,706

35

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
United States: 88.69%
AAC Group Holding Corp., 10.250%, due 10/01/121	$	665,000	$	666,663
ACCO Brands Corp., 10.625%, due 03/15/151		75,000		82,500
Advanced Micro Devices, Inc., 8.125%, due 12/15/171		135,000		134,494
AES Corp., 7.750%, due 03/01/14		50,000		50,750
8.000%, due 06/01/20		250,000		254,375
Affinion Group, Inc., 10.125%, due 10/15/13		500,000		513,750
AK Steel Corp., 7.750%, due 06/15/12		225,000		227,250
Allison Transmission, Inc., 11.000%, due 11/01/151		140,000		147,000
AMC Entertainment, Inc., 8.750%, due 06/01/19		275,000		280,500
American Axle & Manufacturing Holdings, Inc., 9.250%, due 01/15/171		135,000		137,025
American General Finance Corp., Series H, 4.000%, due 03/15/11		225,000		203,425
4.875%, due 05/15/10		150,000		147,925
Series H, 5.375%, due 10/01/12		75,000		60,308
5.625%, due 08/17/11		325,000		283,491
5.850%, due 06/01/13		520,000		410,902
6.900%, due 12/15/17		725,000		503,407
American International Group, Inc., 6.250%, due 03/15/37		705,000		387,750
8.175%, due 05/15/582		675,000		445,500
Ameristar Casinos, Inc., 9.250%, due 06/01/141		225,000		233,438
Apria Healthcare Group, Inc., 11.250%, due 11/01/141		575,000		631,063
12.375%, due 11/01/141		50,000		55,000
Aquilex Holdings LLC, 11.125%, due 12/15/161		70,000		69,825
ARAMARK Corp., 8.500%, due 02/01/15		560,000		576,800
Arch Coal, Inc., 8.750%, due 08/01/161		100,000		105,750
ArvinMeritor, Inc., 8.125%, due 09/15/15		125,000		119,375
Ashland, Inc., 9.125%, due 06/01/171		165,000		181,088
Atlas Pipeline Partners LP, 8.125%, due 12/15/15		550,000		486,750

	Face Amount		Value
Axcan Intermediate Holdings, Inc., 9.250%, due 03/01/15	$	360,000	$	388,350
12.750%, due 03/01/16		720,000		804,600
BAC Capital Trust XI, 6.625%, due 05/23/36		150,000		134,036
Baker & Taylor, Inc., 11.500%, due 07/01/131		400,000		215,500
Baldor Electric Co., 8.625%, due 02/15/17		110,000		112,475
BankAmerica Capital II, 8.000%, due 12/15/26		355,000		347,900
Beazer Homes USA, Inc., 6.875%, due 07/15/15		15,000		11,325
8.125%, due 06/15/16		150,000		113,250
8.375%, due 04/15/12		100,000		94,000
Belden, Inc., 9.250%, due 06/15/191		100,000		105,625
Berry Plastics Escrow LLC, 8.250%, due 11/15/151		125,000		125,625
8.875%, due 09/15/141		100,000		97,250
Biomet, Inc., 10.375%, due 10/15/174		525,000		569,625
11.625%, due 10/15/17		611,000		675,155
Bio-Rad Laboratories, Inc., 8.000%, due 09/15/161		140,000		147,700
Blockbuster, Inc., 11.750%, due 10/01/141		100,000		95,000
Boise Cascade LLC, 7.125%, due 10/15/14		100,000		90,125
Boise Paper Holdings LLC, 9.000%, due 11/01/171		70,000		72,537
Bon-Ton Department Stores, Inc., 10.250%, due 03/15/14		100,000		92,250
Brunswick Corp., 11.250%, due 11/01/161		80,000		90,000
Building Materials Corp of America, 7.750%, due 08/01/14		175,000		173,250
Bumble Bee Foods LLC, 7.750%, due 12/15/151		125,000		125,312
C10 Capital SPV Ltd., 6.722%, due 12/31/161,2,3		235,000		165,637
Cablevision Systems Corp., 8.625%, due 09/15/171		425,000		442,531
Calpine Construction Finance Co. LP, 8.000%, due 06/01/161		200,000		206,000
Carriage Services, Inc., 7.875%, due 01/15/15		250,000		236,875
Case New Holland, Inc., 7.750%, due 09/01/131		175,000		178,937

36

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Cellu Tissue Holdings, Inc., 11.500%, due 06/01/14	$	420,000	$	466,200
Cemex Finance LLC, 9.500%, due 12/14/161		100,000		104,750
Cengage Learning Acquisitions, Inc., 10.500%, due 01/15/151		125,000		119,531
Chesapeake Energy Corp., 7.250%, due 12/15/18		950,000		957,125
Cincinnati Bell, Inc., 8.250%, due 10/15/17		200,000		203,000
CIT Group Funding Co. of Delaware LLC, 10.250%, due 05/01/14		190,000		193,325
10.250%, due 05/01/16		225,000		226,125
CIT Group, Inc., 7.000%, due 05/01/17		525,000		455,437
Citigroup Capital XXI, 8.300%, due 12/21/572		600,000		577,500
Clean Harbors, Inc., 7.625%, due 08/15/16		245,000		248,369
Clear Channel Communications, Inc., 7.250%, due 10/15/27		135,000		66,487
10.750%, due 08/01/16		200,000		157,000
Clear Channel Worldwide Holdings, Inc., 9.250%, due 12/15/171		130,000		133,650
Clearwire Communications LLC, 12.000%, due 12/01/151		425,000		431,375
CMP Susquehanna Corp., 16.612%, due 05/15/145,6		50,000		23,000
Coleman Cable, Inc., 9.875%, due 10/01/12		525,000		526,312
Community Health Systems, Inc., 8.875%, due 07/15/15		400,000		414,000
Comstock Resources, Inc., 8.375%, due 10/15/17		100,000		102,250
Constellation Brands, Inc., Series B, 8.125%, due 01/15/12		230,000		230,862
8.375%, due 12/15/14		250,000		266,250
CPM Holdings, Inc., 10.625%, due 09/01/141		150,000		158,250
Cricket Communications, Inc., 10.000%, due 07/15/15		450,000		456,187
CSC Holdings LLC, 8.625%, due 02/15/191		100,000		107,625
DAE Aviation Holdings, Inc., 11.250%, due 08/01/151		372,000		314,340
Delta Air Lines, Inc., 12.250%, due 03/15/151		325,000		325,000

	Face Amount		Value
Deluxe Corp., 5.000%, due 12/15/12	$	390,000	$	375,862
Denbury Resources, Inc., 9.750%, due 03/01/16		300,000		320,250
Developers Diversified Realty Corp., REIT, 5.375%, due 10/15/12		125,000		117,482
5.500%, due 05/01/15		220,000		193,803
DISH DBS Corp., 6.625%, due 10/01/14		575,000		580,031
Dollar General Corp., 11.875%, due 07/15/174		241,000		278,355
Domtar Corp., 7.875%, due 10/15/11		20,000		20,900
Drummond Co., Inc., 9.000%, due 10/15/141		40,000		41,950
DuPont Fabros Technology LP, 8.500%, due 12/15/171		150,000		152,437
Dycom Investments, Inc., 8.125%, due 10/15/15		175,000		161,000
Dynegy Holdings, Inc., 7.750%, due 06/01/19		815,000		707,012
E*Trade Financial Corp., 7.375%, due 09/15/13		150,000		139,687
12.500%, due 11/30/174		324,000		368,145
Edgen Murray Corp., 12.250%, due 01/15/151		125,000		122,812
Edison Mission Energy, 7.000%, due 05/15/17		930,000		734,700
El Paso Corp., 7.800%, due 08/01/31		640,000		602,517
12.000%, due 12/12/13		330,000		386,925
Encore Acquisition Co., 9.500%, due 05/01/16		175,000		184,625
Energy Future Holdings Corp., 10.875%, due 11/01/17		650,000		531,375
Exopack Holding, Inc., 11.250%, due 02/01/14		495,000		503,044
Ferrell Gas Partners-LP, 6.750%, due 05/01/14		711,000		700,335
8.750%, due 06/15/12		600,000		607,500
9.125%, due 10/01/171		310,000		327,825
FireKeepers Development Authority, 13.875%, due 05/01/151		1,015,000		1,152,025
First Data Corp., 9.875%, due 09/24/15		1,470,000		1,368,275
Ford Motor Credit Co. LLC, 8.000%, due 12/15/16		140,000		140,186
8.700%, due 10/01/14		250,000		261,373
9.875%, due 08/10/11		1,150,000		1,204,075
12.000%, due 05/15/15		375,000		434,860

37

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Forest Oil Corp., 8.500%, due 02/15/141	$	140,000	$	146,300
Freedom Group, Inc., 10.250%, due 08/01/151		265,000		281,231
Freeport-McMoRan Copper & Gold, Inc., 8.375%, due 04/01/17		435,000		476,325
Freescale Semiconductor, Inc., 10.125%, due 12/15/16		325,000		261,625
Frontier Communications Corp., 9.000%, due 08/15/31		805,000		790,912
Genworth Financial, Inc., 6.150%, due 11/15/662		90,000		63,675
Geokinetics Holdings, Inc., 9.750%, due 12/15/141		200,000		196,500
Georgia Gulf Corp., 9.000%, due 01/15/171		35,000		35,350
Georgia-Pacific LLC, 8.250%, due 05/01/161		375,000		397,500
8.875%, due 05/15/31		145,000		153,700
Glen Meadow Pass-Through Trust, 6.505%, due 02/12/671,2		200,000		147,000
GMAC, Inc., 6.750%, due 12/01/14		200,000		189,969
7.250%, due 03/02/11		625,000		623,800
7.250%, due 03/02/111		598,000		592,020
8.000%, due 11/01/31		300,000		269,917
8.000%, due 11/01/311		360,000		324,000
Goodyear Tire & Rubber Co., 10.500%, due 05/15/16		335,000		370,175
Graham Packaging Co. LP, 9.875%, due 10/15/14		775,000		790,500
Graphic Packaging International, Inc., 9.500%, due 08/15/13		185,000		191,013
Great Atlantic & Pacific Tea Co., 11.375%, due 08/01/151		300,000		315,750
Gulfmark Offshore, Inc., 7.750%, due 07/15/14		725,000		721,375
GXS Worldwide, Inc., 9.750%, due 06/15/151		175,000		171,938
Harland Clarke Holdings Corp., 9.500%, due 05/15/15		900,000		835,875
Harrah's Operating Co., Inc., 10.000%, due 12/15/181		600,000		481,500
Harrah's Operating Escrow LLC, 11.250%, due 06/01/171		680,000		711,450
Hartford Financial Services Group, Inc., 8.125%, due 06/15/382		310,000		297,600
HCA, Inc., 9.125%, due 11/15/14		900,000		949,500
9.625%, due 11/15/164		4		4

	Face Amount		Value
Headwaters, Inc., 11.375%, due 11/01/141	$	60,000	$	62,550
Helix Energy Solutions Group, Inc., 9.500%, due 01/15/161		425,000		435,625
Hertz Corp., 10.500%, due 01/01/16		275,000		293,563
Hexion US Finance Corp., 9.750%, due 11/15/14		140,000		137,200
Host Hotels & Resorts LP, 9.000%, due 05/15/171		285,000		308,156
Huntsman International LLC, 5.500%, due 06/30/161		150,000		133,125
ILFC E-Capital Trust I, 5.900%, due 12/21/651,2		100,000		52,000
Inergy LP, 8.250%, due 03/01/16		325,000		329,875
8.750%, due 03/01/15		290,000		297,975
ING Capital Funding Trust III, 8.439%, due 12/31/102,3		190,000		163,400
Ingles Markets, Inc., 8.875%, due 05/15/17		430,000		447,200
Interface, Inc., Series B, 11.375%, due 11/01/13		185,000		206,738
Iron Mountain, Inc., 8.375%, due 08/15/21		425,000		438,813
iStar Financial, Inc., 6.000%, due 12/15/10		130,000		107,900
Jabil Circuit, Inc., 8.250%, due 03/15/18		150,000		160,500
Jacobs Entertainment, Inc., 9.750%, due 06/15/14		525,000		489,563
JC Penney Corp., Inc., 7.125%, due 11/15/23		150,000		148,688
K Hovnanian Enterprises, Inc., 10.625%, due 10/15/161		155,000		161,975
KB Home, 5.750%, due 02/01/14		75,000		70,500
5.875%, due 01/15/15		150,000		138,750
6.250%, due 06/15/15		150,000		139,875
Key Energy Services, Inc., 8.375%, due 12/01/14		365,000		365,913
Land O'Lakes Capital Trust I, 7.450%, due 03/15/281		215,000		189,200
Landry's Restaurants, Inc., 11.625%, due 12/01/151		120,000		127,200
Lennar Corp., Series B, 5.125%, due 10/01/10		150,000		150,750
Levi Strauss & Co., 9.750%, due 01/15/15		300,000		315,000

38

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Liberty Mutual Group, Inc., 7.800%, due 03/15/371	$	100,000	$	82,500
10.750%, due 06/15/581,2		445,000		471,700
Limited Brands, Inc., 7.600%, due 07/15/37		100,000		89,000
8.500%, due 06/15/191		155,000		168,563
LIN Television Corp., Series B, 6.500%, due 05/15/13		800,000		760,000
Lincoln National Corp., 7.000%, due 05/17/662		190,000		157,700
Linn Energy LLC, 11.750%, due 05/15/171		160,000		179,600
Macy's Retail Holdings, Inc., 6.375%, due 03/15/37		225,000		190,125
Massey Energy Co., 6.875%, due 12/15/13		250,000		249,687
McJunkin Red Man Corp., 9.500%, due 12/15/161		375,000		366,563
Mediacom LLC, 9.125%, due 08/15/191		75,000		76,500
Meritage Homes Corp., 6.250%, due 03/15/15		100,000		92,000
7.000%, due 05/01/14		40,000		38,200
MetLife Capital Trust X, 9.250%, due 04/08/381,2		155,000		175,150
MetroPCS Wireless, Inc., 9.250%, due 11/01/14		570,000		577,125
MGM Mirage, Inc., 7.625%, due 01/15/17		190,000		147,725
11.125%, due 11/15/171		410,000		454,075
13.000%, due 11/15/13		100,000		114,750
Michaels Stores, Inc., 11.375%, due 11/01/16		140,000		147,350
Mirant Americas Generation LLC, 9.125%, due 05/01/31		1,100,000		990,000
Mirant North America LLC, 7.375%, due 12/31/13		275,000		271,906
Mobile Mini, Inc., 9.750%, due 08/01/14		160,000		166,400
Momentive Performance Materials, Inc., 9.750%, due 12/01/14		70,000		67,375
10.125%, due 12/01/144		20,237		19,023
12.500%, due 06/15/141		80,000		88,000
Murray Energy Corp., 10.250%, due 10/15/151		125,000		124,375
Nalco Co., 8.875%, due 11/15/13		215,000		221,450
Navios Maritime Holdings, Inc., 8.875%, due 11/01/171		160,000		166,200

	Face Amount		Value
Navistar International Corp., 8.250%, due 11/01/21	$	125,000	$	128,125
NB Capital Trust II, 7.830%, due 12/15/26		300,000		279,000
Neiman Marcus Group, Inc., 9.000%, due 10/15/154		66,456		64,961
10.375%, due 10/15/15		115,000		112,700
NewPage Corp., 11.375%, due 12/31/141		240,000		242,400
Nexstar Broadcasting, Inc., 7.000%, due 01/15/141,4		625		470
Nextel Communications, Inc., Series E, 6.875%, due 10/31/13		375,000		363,750
Series D, 7.375%, due 08/01/15		390,000		379,275
Nielsen Finance LLC, 11.625%, due 02/01/14		140,000		157,325
0.000%, due 08/01/168		450,000		410,625
North American Energy Alliance LLC, 10.875%, due 06/01/161		200,000		212,500
NRG Energy, Inc., 7.375%, due 02/01/16		100,000		100,125
7.375%, due 01/15/17		375,000		375,937
8.500%, due 06/15/19		100,000		102,500
Owens-Brockway Glass Container, Inc., 7.375%, due 05/15/16		120,000		123,900
Peninsula Gaming LLC, 8.375%, due 08/15/151		100,000		99,750
10.750%, due 08/15/171		125,000		125,625
PetroHawk Energy Corp., 7.875%, due 06/01/15		200,000		202,000
10.500%, due 08/01/14		370,000		404,225
Pinnacle Entertainment, Inc., 8.625%, due 08/01/171		100,000		102,000
Pinnacle Foods Finance LLC, 10.625%, due 04/01/17		230,000		239,200
Plains Exploration & Production Co., 7.625%, due 06/01/18		127,000		129,858
10.000%, due 03/01/16		305,000		333,975
PLY Gem Industries, Inc., 11.750%, due 06/15/13		350,000		350,000
Pokagon Gaming Authority, 10.375%, due 06/15/141		653,000		679,120
Prospect Medical Holdings, Inc., 12.750%, due 07/15/14		150,000		157,500
Quicksilver Resources, Inc., 9.125%, due 08/15/19		190,000		198,550
11.750%, due 01/01/16		140,000		158,900

39

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Quiksilver, Inc., 6.875%, due 04/15/15	$	125,000	$	102,500
QVC, Inc., 7.500%, due 10/01/191		200,000		204,000
RBS Global, Inc., 9.500%, due 08/01/14		150,000		150,375
Realogy Corp., 10.500%, due 04/15/14		315,000		272,475
12.375%, due 04/15/15		125,000		97,188
Residential Capital LLC, 9.625%, due 05/15/15		250,000		212,500
Reynolds Group Issuer, Inc., 7.750%, due 10/15/161		100,000		102,250
Rite Aid Corp., 9.500%, due 06/15/17		370,000		321,900
10.375%, due 07/15/16		300,000		318,000
River Rock Entertainment Authority, 9.750%, due 11/01/11		30,000		28,275
Ryerson, Inc., 12.000%, due 11/01/15		165,000		172,425
Salem Communications Corp., 9.625%, due 12/15/161		125,000		130,938
Sally Holdings LLC, 10.500%, due 11/15/16		125,000		134,375
SandRidge Energy, Inc., 8.750%, due 01/15/201		210,000		210,000
9.875%, due 05/15/161		190,000		199,975
Sanmina-SCI Corp., 8.125%, due 03/01/16		485,000		483,788
Scientific Games International, Inc., 9.250%, due 06/15/191		145,000		152,250
Sealy Mattress Co., 10.875%, due 04/15/161		100,000		111,250
Sheridan Group, Inc., 10.250%, due 08/15/11		700,000		653,625
Shingle Springs Tribal Gaming Authority, 9.375%, due 06/15/15		365,000		277,400
Sinclair Broadcast Group, Inc., 8.000%, due 03/15/12		270,000		263,925
Sinclair Television Group, Inc., 9.250%, due 11/01/171		75,000		78,000
Smithfield Foods, Inc., 7.000%, due 08/01/11		100,000		99,750
10.000%, due 07/15/141		190,000		206,150
Spirit Aerosystems, Inc., 7.500%, due 10/01/171		115,000		113,275
Sprint Capital Corp., 8.750%, due 03/15/32		335,000		315,737
SPX Corp., 7.625%, due 12/15/14		400,000		412,000

	Face Amount		Value
Standard Pacific Corp., 9.250%, due 04/15/12	$	140,000	$	135,100
Standard Pacific Escrow LLC, 10.750%, due 09/15/161		115,000		117,300
SunGard Data Systems, Inc., 10.250%, due 08/15/15		865,000		921,225
SUPERVALU, Inc., 8.000%, due 05/01/16		300,000		304,500
Susser Holdings LLC, 10.625%, due 12/15/13		180,000		187,650
Swift Energy Co., 8.875%, due 01/15/20		125,000		128,125
Tenneco, Inc., Series B, 10.250%, due 07/15/13		85,000		87,869
Terremark Worldwide, Inc., 12.000%, due 06/15/171		170,000		187,850
Tesoro Corp., 9.750%, due 06/01/19		75,000		77,625
Texas Competitive Electric Holdings Co. LLC, Series A, 10.250%, due 11/01/15		410,000		332,100
Texas Industries, Inc., 7.250%, due 07/15/13		165,000		162,113
Toll Brothers Finance Corp., 8.910%, due 10/15/17		225,000		255,454
Toys R Us Property Co. LLC, 8.500%, due 12/01/171		150,000		152,625
TransDigm, Inc., 7.750%, due 07/15/141		75,000		76,125
Trimas Corp., 9.750%, due 12/15/171		30,000		29,438
Triumph Group, Inc., 8.000%, due 11/15/171		55,000		55,481
TRW Automotive, Inc., 7.000%, due 03/15/141		155,000		151,900
Tube City IMS Corp., 9.750%, due 02/01/15		1,000,000		966,250
Tunica-Biloxi Gaming Authority, 9.000%, due 11/15/151		600,000		540,750
Tyson Foods, Inc., 10.500%, due 03/01/14		175,000		199,938
Umbrella Acquisition, Inc., 9.750%, due 03/15/151,4		421,000		368,901
Unisys Corp., 12.750%, due 10/15/141		300,000		346,500
United Rentals North America, Inc., 7.750%, due 11/15/13		475,000		446,500
Universal Hospital Services, Inc., 8.500%, due 06/01/154		130,000		128,050

40

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
US Concrete, Inc., 8.375%, due 04/01/14	$	270,000	$	162,338
US Oncology, Inc., 9.125%, due 08/15/17		200,000		210,000
Vanguard Health Holding Co. II LLC, 9.000%, due 10/01/14		530,000		549,213
Verso Paper Holdings LLC, Series B, 9.125%, due 08/01/14		370,000		353,350
Vertis, Inc., 13.500%, due 04/01/144		190,529		63,113
Viasystems, Inc., 12.000%, due 01/15/151		85,000		91,056
Viskase Cos., Inc., 9.875%, due 01/15/181		150,000		151,125
West Corp., 11.000%, due 10/15/16		300,000		313,500
Windstream Corp., 8.625%, due 08/01/16		425,000		432,438
WMG Acquisition Corp., 9.500%, due 06/15/161		460,000		492,775
Yankee Acquisition Corp., Series B, 8.500%, due 02/15/15		290,000		287,825
9.750%, due 02/15/17		245,000		241,325
Yonkers Racing Corp., 11.375%, due 07/15/161		150,000		157,500
Zions Bancorp., 5.500%, due 11/16/15		200,000		141,397
Total United States corporate bonds				78,666,816
Total corporate bonds (cost $78,270,131)				86,503,248
Asset-backed securities: 0.15%
United States: 0.15%
Citibank Credit Card Issuance Trust, Series 2006-C4, Class C4, 0.455%, due 01/09/122		100,000		99,975
Countrywide Asset-Backed Certificates, Series 2006-20, Class 2A1, 0.281%, due 04/25/472		36,521		35,420
Total asset-backed securities (cost $133,879)				135,395

	Face Amount		Value
Commercial mortgage-backed security: 0.05%
United States: 0.05%
GS Mortgage Securities Corp. II, Series 2007-GG10, Class C, 5.805%, due 08/10/452 (cost $45,000)	$	250,000	$	40,234
Total bonds (cost $78,449,010)				86,678,877
	Shares
Common stocks: 0.05%
United States: 0.05%
Hotels, restaurants & leisure: 0.00%
American Restaurant Group, Inc.*5,6		972		0
Media-cable: 0.05%
Knology, Inc.*		3,926		42,990
Printing & publishing: 0.00%
Vertis Holdings, Inc.*5,6		8,952		0
Total common stocks (cost $0)				42,990
Preferred stock: 0.00%9
United States: 0.00%9
Media—broadcast: 0.00%9
CMP Susquehanna Radio Holdings Corp., Series A*2,3,5,6,7 (cost $135)		11,661		117
	Number of Warrants
Warrants: 0.00%9
CNB Capital Trust I, strike @ $0.01, expires 03/26/19*5,6		13,325		133
Pliant Corp., strike @ $0.01, expires 06/01/10*5,6		1		0
Sabreliner Corp., strike @ $0.01, expires 06/08/18*5,6		8,400		0
Total warrants (cost $153,135)				133

41

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Short-term investment: 0.02%
Investment company: 0.02%
UBS Cash Management Prime Relationship Fund, 0.120%10,11 (cost $17,940)		17,940	$	17,940
Total investments: 97.79% (cost $78,620,220)				86,740,057
Cash and other assets, less liabilities: 2.21%				1,958,829
Net assets: 100.00%			$	88,698,886

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $78,620,220; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	9,974,764
Gross unrealized depreciation		(1,854,927	)
Net unrealized appreciation of investments	$	8,119,837

*  Non-income producing security.

¹  Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities are considered liquid, unless noted otherwise, and may be resold in transactions exempt from registration, normally to qualified institutional buyers. At December 31, 2009, the value of these securities amounted to $24,480,595 or 27.60% of net assets.

²  Floating rate security—The interest rates shown are the current rates as of December 31, 2009.

³  Perpetual bond security. The maturity date reflects the next call date.

⁴  PIK—Payment-in kind security. Income may be paid in cash or additional notes, at the discretion of the issuer.

⁵  Security is illiquid. At December 31, 2009, the value of these securities amounted to $23,250 or 0.03% of net assets.

⁶  Security is being fair valued by a valuation committee under the direction of the Board of Trustees. At December 31, 2009, the value of these securities amounted to $23,250 or 0.03% of net assets.

⁷  This security, which represents less than 0.01% of net assets as of December 31, 2009, is considered restricted. (See restricted security table below for more information.)

Restricted security

Acquisition date

Acquisition cost

Acquisition cost as a percentage of net assets

12/31/09 Market value

12/31/09 Market value as a percentage of net assets

CMP Susquehanna Radio Holdings Corp.,

Series A,

03/30/09

$

135

0.00

%a

$

117

0.00

%a

^a  Amount represents less than 0.005%.

⁸  Step bond—Coupon rate increases in increments to maturity. Rate disclosed is as of December 31, 2009. Maturity date disclosed is the ultimate maturity date.

⁹  Amount represents less than 0.005%.

¹⁰  Investment in affiliated investment company.

¹¹  The rate shown reflects the yield at December 31, 2009.

42

UBS High Yield Fund

Portfolio of investments

December 31, 2009 (unaudited)
Concluded

GMAC  General Motors Acceptance Corp.

GS  Goldman Sachs

REIT  Real estate investment trust

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks	$	42,990	$	—	$	—	$	42,990
Corporate bonds		—		86,480,248		23,000		86,503,248
Asset-backed securities		—		135,395		—		135,395
Commercial mortgage-backed security		—		40,234		—		40,234
Warrants		—		—		133		133
Preferred stock		—		—		117		117
Short-term investment		—		17,940		—		17,940
Total	$	42,990	$	86,673,817	$	23,250	$	86,740,057

Level 3 Rollforward Disclosure

The following is a rollforward of the Fund's investments that were valued using unobservable inputs for the period:

Measurements using unobservable inputs (Level 3)
	Corporate bonds			Warrants		Preferred stock		Total
Assets
Beginning balance	$	23,892		$	133	$	117	$	24,142
Total gains or losses (realized/unrealized) included in earnings		—			—		—		—
Purchases, sales, issuances, and settlements (net)		—			—		—		—
Transfers in and/or out of Level 3		(892	)		—		—		(892	)
Ending balance	$	23,000		$	133	$	117	$	23,250
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to investments still held at 12/31/09	$	40,067		$	—	$	—	$	40,067

See accompanying notes to financial statements.
43

UBS U.S. Bond Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS U.S. Bond Fund (the "Fund") gained 7.10% (Class A shares returned 2.34% after the deduction of the maximum sales charge), while Class Y shares returned 7.24%. The Fund's benchmark, the Barclays Capital US Aggregate Index (the "Index"), returned 3.95% over the same time period.¹ (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 46; please note that the Fund's returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect fees and expenses.)

Sector positioning and security allocation helped the Fund to significantly outperform its benchmark during the reporting period.

Portfolio performance summary²

What worked

•  The Fund's sector positioning was rewarded during the reporting period.

  – The Fund's overweight exposure to the spread sectors (non-Treasury sectors) was rewarded as they handily outperformed Treasuries. In particular, the Fund's positions in corporate bonds, and asset-backed and commercial mortgage-backed securities enhanced results as their spreads narrowed from their elevated levels earlier in the year. (Spread measures the difference between the yields paid on a security versus those paid on US Treasuries.)

  – A small out-of-index exposure to emerging markets debt was a positive for performance as the sector outperformed the Index.

  – An underweight to Treasuries contributed to performance given their weak results versus the spread sectors. During the reporting period, the Fund generally had a 15% to 18% exposure to Treasuries, versus roughly a 25% weighting in the Index.

  – The Fund's exposure to Treasury inflation protected securities generated positive results for performance.

  – A small allocation to European sovereign credits was a positive contributor to performance over the period.

•  Security selection was, overall, a positive for performance.

  – The Fund's selection of commercial mortgage-backed securities (CMBS) generated good performance. Within the sector, the Fund emphasized AAA-rated securities at the top of the capital structure (that is, senior debt).³

  – The Fund's asset-backed securities (ABS) were positive contributors, as BBB-rated credit card receivables performed well during the reporting period.⁴

  – Within the corporate bond sector, the Fund's financial and utility holdings generated strong results.

¹  The Index was formerly known as the Lehman Brothers US Aggregate Index.

²  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

³  Bonds which are rated AAA are judged to be of the best quality.

⁴  Bonds rated BBB are regarded as having an adequate capacity to pay principal and interest.

44

UBS U.S. Bond Fund

What didn't work

•  Yield curve positioning mostly detracted from performance.

•  A small allocation to non-agency residential mortgage-backed securities detracted from performance.

•  The portfolio was underweight to industrials, which negatively impacted performance.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

45

UBS U.S. Bond Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		7.10	%		10.62	%		0.42	%		3.67	%		3.98	%
Class B3		6.69	%		9.91	%		(0.32	)%		N/A			1.42	%6
Class C4		6.72	%		10.10	%		(0.11	)%		N/A			1.44	%
Class Y5		7.24	%		10.91	%		0.67	%		3.92	%		4.53	%
After deducting maximum sales charge
Class A2		2.34	%		5.62	%		(0.50	)%		3.20	%		3.60	%
Class B3		1.69	%		4.91	%		(0.64	)%		N/A			1.42	%6
Class C4		5.97	%		9.35	%		(0.11	)%		N/A			1.44	%
Barclays Capital US Aggregate Index7		3.95	%		5.93	%		4.97	%		6.33	%		6.24	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.31% and 0.68%; Class B—2.14% and 1.43%; Class C—1.80% and 1.18%; Class Y—1.00% and 0.43%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The net expenses listed above reflect the management fee waiver/expense reimbursement put in place for the fiscal year ending June 30, 2010. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred through investment in other investment companies), through the fiscal year ending June 30, 2010, do not exceed 0.64% for Class A shares, 1.39% for Class B shares, 1.14% for Class C shares and 0.39% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund. Pursuant to the previous fee waiver and expense reimbursement agreement, the actual "Net expenses" (including Acquired fund fees and expenses) for the fiscal year ending June 30, 2009 were 0.89% for the Class A shares, 1.64% for the Class B shares, 1.39% for the Class C shares and 0.64% for the Class Y shares.

¹  Inception date of UBS U.S. Bond Fund Class A shares is June 30, 1997. Inception dates of Class B and Class C shares are November 6, 2001 and November 8, 2001, respectively. Inception date of Class Y shares and the index is August 31,1995.

²  Maximum sales charge for Class A shares is 4.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 0.75% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Portfolio offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The Barclays Capital US Aggregate Index (formerly known as the Lehman Brothers US Aggregate Index) is an unmanaged index of the USD-denominated, investment-grade, fixed rate, taxable bond market of SEC-regulated securities. The index includes bonds from the treasury, government-related, corporate, mortgage-backed, asset-backed and commercial-backed sectors. US agency hybrid adjustable rate mortgage (ARM) securities were added to the index on April 1, 2007. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

46

UBS U.S. Bond Fund

Industry diversification (unaudited)¹

As a percentage of net assets as of December 31, 2009

Bonds
Corporate bonds
Aerospace & defense	0.26	%
Beverages	0.20
Capital markets	1.18
Chemicals	0.14
Commercial banks	1.54
Commercial services & supplies	0.50
Communications equipment	0.12
Consumer finance	0.12
Diversified financial services	2.62
Diversified telecommunication services	0.36
Electric utilities	1.37
Electronic equipment, instruments & components	0.27
Food & staples retailing	0.74
Food products	0.14
Gas distribution	0.26
Health care providers & services	0.33
Insurance	1.63
Media	1.03
Metals & mining	0.44
Multi-utilities	0.17
Non-food & drug retailers	0.31
Oil, gas & consumable fuels	1.85
Pharmaceuticals	0.14
Real estate investment trust (REIT)	0.07
Road & rail	0.07
Software	0.11
Tobacco	0.21
Wireless telecommunication services	0.10
Total corporate bonds	16.28	%
Asset-backed securities	8.44
Commercial mortgage-backed securities	11.51
Mortgage & agency debt securities	41.92
Municipal bonds	0.50
US government obligations	15.31
Total bonds	93.96	%
Investment companies
UBS Corporate Bond Relationship Fund	7.47
UBS Opportunistic Emerging Markets Debt Relationship Fund	2.42
Total investment companies	9.89	%
Short-term investment	0.20
Investment of cash collateral from securities loaned	0.96
Total investments	105.01	%
Liabilities, in excess of cash and other assets	(5.01	)
Net assets	100.00	%

Top ten fixed income holdings (unaudited)²

As of December 31, 2009

	Percentage of net assets
US Treasury Notes, 1.000%, due 10/31/11		4.4	%
Federal National Mortgage Association Pools, #948631, 6.000%, due 08/01/37		3.5
US Treasury Bonds, 8.750%, due 08/15/20		3.3
US Treasury Notes, 2.125%, due 11/30/14		3.3
Federal Home Loan Mortgage Corp. Gold Pools, #G08307, 5.000%, due 11/01/38		3.2
Federal Home Loan Mortgage Corporation Gold Pools, 4.500%, TBA		2.7
Federal National Mortgage Association, 1.875%, due 04/20/12		2.6
Federal Home Loan Mortgage Corp. Gold Pools, #G05249, 5.000%, due 01/01/39		2.4
Federal National Mortgage Association, 2.625%, due 11/20/14		2.3
Federal Home Loan Mortgage Corp. Gold Pools, #G04121, 5.500%, due 04/01/38		2.3
Total		30.0	%

¹  Figures represent the industry breakdown of direct investments of the UBS U.S. Bond Fund. Figures would be different if a breakdown of the underlying investment companies' industry diversification was included.

²  Figures represent the direct investments of the UBS U.S. Bond Fund. Figures could be different if a breakdown of the underlying investment companies was included.

47

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Bonds: 93.96%
Corporate bonds: 16.28%
Canada: 0.45%
Anadarko Finance Co., Series B, 7.500%, due 05/01/31	$	20,000	$	22,437
Canadian Natural Resources Ltd., 5.850%, due 02/01/35		65,000		63,650
Cenovus Energy, Inc., 4.500%, due 09/15/141		135,000		139,353
Total Canada corporate bonds				225,440
France: 0.26%
Credit Agricole SA, 6.637%, due 05/31/171,2,3		100,000		81,000
France Telecom SA, 4.375%, due 07/08/14		50,000		52,248
Total France corporate bonds				133,248
Ireland: 0.16%
Iberdrola Finance Ireland Ltd., 3.800%, due 09/11/141		80,000		80,362
Luxembourg: 0.20%
Enel Finance International SA, 3.875%, due 10/07/141		100,000		101,218
Netherlands: 0.12%
Siemens Financieringsmaatschappij NV, 6.125%, due 08/17/261		55,000		58,270
Sweden: 0.32%
Svenska Handelsbanken AB, 2.875%, due 09/14/121		160,000		160,987
United Kingdom: 0.89%
Anglo American Capital PLC, 9.375%, due 04/08/191		100,000		127,021
Barclays Bank PLC, 6.750%, due 05/22/19		100,000		111,543
Royal Bank of Scotland Group PLC, 6.400%, due 10/21/19		160,000		159,486
Vodafone Group PLC, 5.450%, due 06/10/19		50,000		51,776
Total United Kingdom corporate bonds				449,826
United States: 13.88%
Allied Waste North America, Inc., 6.875%, due 06/01/17		60,000		63,675
Allstate Corp., 7.450%, due 05/16/19		55,000		63,900

	Face Amount		Value
Anadarko Petroleum Corp., 6.450%, due 09/15/36	$	75,000	$	78,328
Anheuser-Busch InBev Worldwide, Inc., 4.125%, due 01/15/151		100,000		101,535
Apria Healthcare Group, Inc., 11.250%, due 11/01/141		150,000		164,625
Arch Coal, Inc., 8.750%, due 08/01/161		90,000		95,175
BAE Systems Holdings, Inc., 4.950%, due 06/01/141		65,000		67,681
Bank of America Corp., 7.625%, due 06/01/19		150,000		173,527
Browning-Ferris Industries, Inc., 7.400%, due 09/15/35		35,000		38,619
Capital One Financial Corp., 7.375%, due 05/23/14		55,000		62,273
CenterPoint Energy Resources Corp., 6.000%, due 05/15/18		115,000		118,082
Chesapeake Energy Corp., 9.500%, due 02/15/15		125,000		137,188
Cisco Systems, Inc., 5.900%, due 02/15/39		60,000		60,665
Citigroup, Inc., 6.125%, due 05/15/18		285,000		286,541
8.125%, due 07/15/39		60,000		67,719
CVS Caremark Corp., 6.125%, due 09/15/39		160,000		158,576
CVS Pass-Through Trust, 6.036%, due 12/10/28		69,605		65,870
DirecTV Financing Co., Inc., 7.625%, due 05/15/16		95,000		103,788
Dominion Resources, Inc., 5.200%, due 08/15/19		85,000		86,325
ERAC USA Finance Co., 7.000%, due 10/15/371		85,000		83,199
Express Scripts, Inc., 6.250%, due 06/15/14		65,000		70,923
Ferrell Gas Partners-LP, 8.750%, due 06/15/12		150,000		151,875
FirstEnergy Solutions Corp., 4.800%, due 02/15/15		165,000		168,414
Freedom Group, Inc., 10.250%, due 08/01/151		75,000		79,594
General Electric Capital Corp., 6.000%, due 08/07/19		245,000		254,315
GMAC, Inc., 7.250%, due 03/02/111		150,000		148,500
Goldman Sachs Group, Inc., 6.150%, due 04/01/18		260,000		278,330

48

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Inergy LP, 8.750%, due 03/01/15	$	125,000	$	128,437
Jabil Circuit, Inc., 8.250%, due 03/15/18		125,000		133,750
Jersey Central Power & Light Co., 7.350%, due 02/01/19		60,000		68,102
JP Morgan Chase Capital XXII, 6.450%, due 02/02/37		135,000		123,894
JPMorgan Chase & Co., 6.300%, due 04/23/19		200,000		220,015
Kellogg Co., 4.450%, due 05/30/16		70,000		72,084
Kinder Morgan Energy Partners LP, 5.800%, due 03/15/35		70,000		64,854
Massachusetts Mutual Life Insurance Co., 8.875%, due 06/01/391		50,000		61,322
MetLife, Inc., 6.400%, due 12/15/36		100,000		87,500
10.750%, due 08/01/39		50,000		61,571
Morgan Stanley, 5.625%, due 09/23/19		100,000		100,731
Series F, 6.625%, due 04/01/18		200,000		216,234
Mosaic Co., 7.375%, due 12/01/141		65,000		69,586
News America, Inc., 6.200%, due 12/15/34		35,000		35,176
6.900%, due 08/15/391		60,000		65,452
Nisource Finance Corp., 10.750%, due 03/15/16		135,000		166,345
Norfolk Southern Corp., 5.750%, due 04/01/18		35,000		37,024
Northrop Grumman Systems Corp., 7.875%, due 03/01/26		55,000		66,586
NRG Energy, Inc., 7.375%, due 02/01/16		100,000		100,125
Oncor Electric Delivery Co. LLC, 6.800%, due 09/01/18		50,000		55,539
ONEOK, Inc., 6.000%, due 06/15/35		60,000		55,999
Oracle Corp., 6.125%, due 07/08/39		55,000		57,752
Pacific Gas & Electric Co., 6.050%, due 03/01/34		30,000		31,321
Pacific Life Insurance Co., 9.250%, due 06/15/391		150,000		173,210
Pemex Project Funding Master Trust, 5.750%, due 03/01/18		100,000		101,113
Principal Financial Group, Inc., 8.875%, due 05/15/19		105,000		121,119

	Face Amount		Value
Prudential Financial, Inc., Series D, 3.625%, due 09/17/12	$	160,000	$	162,367
Series C, 5.400%, due 06/13/35		105,000		91,656
Qwest Corp., 7.625%, due 06/15/15		125,000		129,375
Reynolds American, Inc., 6.750%, due 06/15/17		35,000		36,246
7.625%, due 06/01/16		65,000		70,862
Safeway, Inc., 5.000%, due 08/15/19		150,000		148,751
Simon Property Group LP, 5.375%, due 06/01/11		35,000		36,332
Time Warner Cable, Inc., 6.550%, due 05/01/37		65,000		66,235
6.750%, due 07/01/18		100,000		109,856
Wachovia Corp., Series G, 5.750%, due 02/01/18		165,000		172,189
Waste Management, Inc., 6.125%, due 11/30/39		60,000		59,626
WMG Acquisition Corp., 9.500%, due 06/15/161		125,000		133,906
Yankee Acquisition Corp., Series B, 8.500%, due 02/15/15		75,000		74,438
Total United States corporate bonds				6,995,922
Total corporate bonds (cost $7,831,167)				8,205,273
Asset-backed securities: 8.44%
United States: 8.44%
Ameriquest Mortgage Securities, Inc., Series 2005-R6, Class A2, 0.431%, due 08/25/352		94,065		82,956
Bank of America Credit Card Trust, Series 2007-B3, Class B3, 0.433%, due 08/15/162		400,000		353,618
Series 2008-A1, Class A1, 0.813%, due 04/15/132		375,000		374,148
Capital One Multi-Asset Execution Trust, Series 2003-B5, Class B5, 4.790%, due 08/15/13		150,000		152,275
Series 2008-A3, Class A3, 5.050%, due 02/15/16		325,000		348,791
Chase Issuance Trust, Series 2005-C2, Class C2, 0.673%, due 01/15/152		225,000		214,540

49

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Citibank Credit Card Issuance Trust, Series 2006-C4, Class C4, 0.455%, due 01/09/122	$	175,000	$	174,957
Conseco Finance, Series 2001-D, Class M2, 1.983%, due 11/15/322		465,340		112,358
Countrywide Asset-Backed Certificates, Series 2006-20, Class 2A1, 0.281%, due 04/25/472		38,804		37,634
GSAMP Trust, Series 2006-S3, Class A1, 6.085%, due 05/25/36		628,667		40,556
MBNA Credit Card Master Note Trust, Series 2006-B1, Class B1, 0.453%, due 07/15/152		300,000		276,510
Series 2004-B1, Class B1, 4.450%, due 08/15/16		600,000		571,320
Series 2002-C1, Class C1, 6.800%, due 07/15/14		770,000		789,925
MBNA Master Credit Card Trust, Series 2001-C, Class C, 7.100%, due 09/15/131		400,000		408,890
Series 2001-B, Class C, 7.250%, due 08/15/131		100,000		102,815
Merrill Lynch First Franklin Mortgage Loan Trust, Series 2007-A, Class A1, 1.331%, due 10/25/272		18,246		17,728
Morgan Stanley ABS Capital I, Series 2006-HE6, Class A2A, 0.271%, due 09/25/362		8,705		8,634
Renaissance Home Equity Loan Trust, Series 2006-4, Class AF1, 5.545%, due 01/25/37		69,635		69,051
Residential Asset Mortgage Products, Inc., Series 2006-RZ5, Class A1B, 0.331%, due 08/25/462		20,727		20,377
Structured Asset Securities Corp., Series 2005-S7, Class A2, 0.531%, due 12/25/351,2		290,784		97,596
Total asset-backed securities (cost $5,159,949)				4,254,679

	Face Amount		Value
Commercial mortgage-backed securities: 11.51%
United States: 11.51%
Banc of America Commercial Mortgage, Inc., Series 2006-6, Class A2, 5.309%, due 10/10/45	$	400,000	$	401,747
Series 2006-6, Class A4, 5.356%, due 10/10/45		625,000		560,298
Series 2007-3, Class A2, 5.658%, due 06/10/492		450,000		457,851
Bear Stearns Commercial Mortgage Securities Trust, Series 2006-PW12, Class A4, 5.719%, due 09/11/382		300,000		304,631
Citigroup Commercial Mortgage Trust, Series 2007-C6, Class AM, 5.700%, due 12/10/492		970,000		699,228
Citigroup/Deutsche Bank Commercial Mortgage Trust, Series 2006-CD2, Class A4, 5.363%, due 01/15/462		300,000		286,760
Series 2006-CD3, Class A2, 5.560%, due 10/15/48		325,000		331,986
GS Mortgage Securities Corp. II, Series 2006-GG8, Class A2, 5.479%, due 11/10/39		190,000		191,872
Series 2006-GG6, Class A2, 5.506%, due 04/10/382		200,000		202,673
Series 2007-GG10, Class A4, 5.805%, due 08/10/452		790,000		678,329
JPMorgan Chase Commercial Alternative Mortgage Product, Series 2006-CB17, Class A4, 5.429%, due 12/12/43		650,000		614,019
Merrill Lynch/Countrywide Commercial Mortgage Trust, Series 2006-3, Class B, 5.525%, due 07/12/462		300,000		105,406
Wachovia Bank Commercial Mortgage Trust, Series 2006-C23, Class A4, 5.418%, due 01/15/452		400,000		383,154
Series 2006-C23, Class AM, 5.466%, due 01/15/452		475,000		376,883
Series 2006-C27, Class A2, 5.624%, due 07/15/45		200,000		204,752
Total commercial mortgage-backed securities (cost $5,345,171)				5,799,589

50

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
Mortgage & agency debt securities: 41.92%
United States: 41.92%
Federal Home Loan Bank, 1.750%, due 08/22/12	$	1,115,000	$	1,116,148
Federal Home Loan Mortgage Corp. Gold Pools,† 4.500%, TBA		1,375,000		1,371,562
#G08353, 4.500%, due 07/01/39		320,403		319,936
#G08307, 5.000%, due 11/01/38		1,564,452		1,606,001
#G05249, 5.000%, due 01/01/39		1,187,234		1,218,765
#G04121, 5.500%, due 04/01/38		1,089,089		1,142,126
#G04458, 5.500%, due 06/01/38		651,111		682,782
#G04567, 5.500%, due 07/01/38		685,548		718,895
#C63008, 6.000%, due 01/01/32		429,473		460,207
#G01717, 6.500%, due 11/01/29		195,522		211,621
Federal National Mortgage Association,† 1.875%, due 04/20/12		1,280,000		1,293,330
2.625%, due 11/20/14		1,155,000		1,146,044
2.875%, due 12/11/13		325,000		331,507
4.500%, TBA		600,000		598,875
5.250%, due 08/01/12		165,000		176,077
Federal National Mortgage Association Pools,† #AA0837, 4.500%, due 01/01/39		634,795		634,329
#AC4370, 4.500%, due 10/01/39		199,354		199,188
#576764, 5.500%, due 09/01/24		145,351		153,755
#688066, 5.500%, due 03/01/33		332,770		352,516
#688314, 5.500%, due 03/01/33		391,916		415,098
#802481, 5.500%, due 11/01/34		644,101		682,562
#961534, 5.500%, due 02/01/38		550,837		577,231
#931923, 5.500%, due 04/01/38		580,801		608,631
#408267, 6.000%, due 03/01/28		34,946		37,740
#323715, 6.000%, due 05/01/29		36,238		38,843

	Face Amount		Value
#522564, 6.000%, due 07/01/29	$	115,234	$	123,070
#676733, 6.000%, due 01/01/33		278,648		301,134
#708631, 6.000%, due 06/01/33		58,219		63,084
#948631, 6.000%, due 08/01/37		1,642,411		1,742,239
#986944, 6.000%, due 09/01/38		220,966		234,258
#831730, 6.500%, due 09/01/36		472,873		507,452
#253824, 7.000%, due 03/01/31		11,364		12,636
First Horizon Asset Securities, Inc., Series 2004-FL1, Class 1A1, 0.501%, due 02/25/352		49,756		33,237
Government National Mortgage Association Pools, #701813, 4.500%, due 04/15/39		707,408		709,133
#G2 2687, 6.000%, due 12/20/28		44,635		47,753
#G2 2794, 6.000%, due 08/20/29		147,046		157,327
6.500%, TBA		1,000,000		1,063,125
WaMu Mortgage Pass-Through Certificates, Series 2007-HY1, Class 3B2, 5.868%, due 02/25/372		1,098,454		33,935
Total mortgage & agency debt securities (cost $20,836,133)				21,122,152
Municipal bonds: 0.50%
New Jersey State Turnpike Authority Revenue Bonds, Class F, 7.414%, due 01/01/40		30,000		33,816
New York State Urban Development Corp. Revenue Bonds, 5.770%, due 03/15/39		55,000		54,458
State of California General Obligation Bonds, 7.300%, due 10/01/39		170,000		160,663
Total municipal bonds (cost $261,377)				248,937

51

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Face Amount		Value
US government obligations: 15.31%
US Treasury Bonds, 4.500%, due 08/15/39	$	505,000	$	493,559
8.750%, due 08/15/20		1,195,000		1,690,552
US Treasury Notes, 0.750%, due 11/30/114		635,000		630,858
1.000%, due 10/31/114		2,240,000		2,237,984
2.125%, due 11/30/144		1,720,000		1,679,287
3.375%, due 11/15/194		1,020,000		981,118
Total US government obligations (cost $7,853,867)				7,713,358
Total bonds (cost $47,287,664)				47,343,988
	Shares
Investment companies: 9.89%
UBS Corporate Bond Relationship Fund*5		290,316		3,765,428
UBS Opportunistic Emerging Markets Debt Relationship Fund*5		87,801		1,218,781
Total investment companies (cost $4,471,444)				4,984,209

	Shares		Value
Short-term investment: 0.20%
Investment company: 0.20%
UBS Cash Management Prime Relationship Fund, 0.120%5,6 (cost $98,432)		98,432	$	98,432
Investment of cash collateral from securities loaned: 0.96%
UBS Private Money Market Fund LLC, 0.134%5,6 (cost $484,809)		484,809		484,809
Total investments: 105.01% (cost $52,342,349)				52,911,438
Liabilities, in excess of cash and other assets: (5.01%)				(2,522,455	)
Net assets: 100.00%			$	50,388,983

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $52,342,349; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	2,180,276
Gross unrealized depreciation		(1,611,187	)
Net unrealized appreciation of investments	$	569,089

*  Non-income producing security.

†  On September 7, 2008, the Federal Housing Finance Agency placed the Federal National Mortgage Association and the Federal Home Loan Mortgage Corporation into conservatorship, and the US Treasury guaranteed the debt issued by those organizations.

¹  Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities are considered liquid, unless noted otherwise, and may be resold in transactions exempt from registration, normally to qualified institutional buyers. At December 31, 2009, the value of these securities amounted to $2,601,297 or 5.16% of net assets.

²  Floating rate security—The interest rates shown are the current rates as of December 31, 2009.

³  Perpetual bond security. The maturity date reflects the next call date.

⁴  Security, or portion thereof, was on loan at December 31, 2009.

⁵  Investment in affiliated investment company.

⁶  The rate shown reflects the yield at December 31, 2009.

ABS  Asset-backed securities

GMAC  General Motors Acceptance Corp.

GS  Goldman Sachs

GSAMP  Goldman Sachs Mortgage Securities Corp.

TBA  (To be announced) Security is purchased on a forward commitment basis with an approximate principal amount (generally +/-1.0%) and no definite maturity date. The actual principal amount and maturity date will be determined upon settlement, when the specific mortgage pools are assigned.

52

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)

Futures contracts

UBS U.S. Bond Fund had the following open futures contracts as of December 31, 2009:

	Expiration dates	Cost/ (proceeds)			Value			Unrealized appreciation/ (depreciation)
US Treasury futures buy contracts:
10 Year US Treasury Notes, 60 contracts (USD)	March 2010	$	7,183,949		$	6,927,188		$	(256,761	)
US Treasury futures sell contracts:
5 Year US Treasury Notes, 113 contracts (USD)	March 2010		(13,224,358	)		(12,925,258	)		299,100
Net unrealized appreciation on futures contracts								$	42,339

Currency type abbreviations:

USD  United States Dollar

UBS U.S. Bond Fund had outstanding interest rate swap agreements with the following terms as of December 31, 2009:

Counterparty	Notional amount		Termination dates	Payments made by the Fund			Payments received by the Fund			Upfront payments (made)/ received		Value			Unrealized appreciation/ (depreciation)
Citigroup Global Markets Limited	USD	6,600,000	11/15/16		4.0000	%1		—2		$	—	$	(154,909	)	$	(154,909	)
Credit Suisse	USD	34,900,000	01/13/10		0.23413			0.6544	%4		—		28,972			28,972
Deutsche Bank AG	USD	10,610,000	05/31/14		—2			2.33001			—		(246,468	)		(246,468	)
Merrill Lynch International	USD	37,300,000	01/13/10		0.23413			0.65444			—		30,964			30,964
										$	—	$	(341,441	)	$	(341,441	)

¹  Payments made or received are based on the notional amount.

²  Rate based on 3 month LIBOR (USD BBA). This is a forward starting trade and, as such, a floating rate has not yet been assigned as of December 31, 2009.

³  Rate based on 3 month LIBOR (USD BBA).

⁴  Rate based on 1 month LIBOR (USD BBA).

BBA  British Banking Association

LIBOR  London Interbank Offered Rate

Currency type abbreviation:

USD  United States Dollar

53

UBS U.S. Bond Fund

Portfolio of investments

December 31, 2009 (unaudited)
Concluded

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)			Unobservable inputs (Level 3)		Total
Corporate bonds	$	—	$	8,205,273		$	—	$	8,205,273
Asset-backed securities		—		4,254,679			—		4,254,679
Commercial mortgage-backed securities		—		5,799,589			—		5,799,589
Mortgage & agency debt securities		—		21,122,152			—		21,122,152
Municipal bonds		—		248,937			—		248,937
US government obligations		—		7,713,358			—		7,713,358
Investment companies		—		4,984,209			—		4,984,209
Short-term investment		—		98,432			—		98,432
Investment of cash collateral from securities loaned		—		484,809			—		484,809
Other financial instruments1		42,339		(341,441	)		—		(299,102	)
Total	$	42,339	$	52,569,997		$	—	$	52,612,336

¹  Other financial instruments may include open futures contracts, swap agreements, options and forward foreign currency contracts.

Level 3 Rollforward Disclosure

The following is a rollforward of the Fund's investments that were valued using unobservable inputs for the period:
Measurements using unobservable inputs (Level 3)
	Commercial mortgage-backed securities			Total
Assets
Beginning balance	$	72,944		$	72,944
Total gains or losses (realized/unrealized) included in earnings		—			—
Purchases, sales, issuances, and settlements (net)		—			—
Transfers in and/or out of Level 3		(72,944	)		(72,944	)
Ending balance	$	—		$	—
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to investments still held at 12/31/09	$	—		$	—

See accompanying notes to financial statements.
54

The UBS Funds

December 31, 2009 (unaudited)

Explanation of expense disclosure (unaudited)

As a shareholder of the Funds, you incur two types of costs: (1) transactional costs (as applicable); including sales charges (loads); and (2) ongoing costs, including management fees; service and/or distribution (12b-1) fees (if applicable); and other Fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in each Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The example below is based on an investment of $1,000 invested at the beginning of the period and held for the entire period, July 1, 2009 to December 31, 2009.

Actual expenses

The first line of each class of shares in the table below provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over a period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses paid during period" to estimate the expenses you paid on your account during this period.

Hypothetical example for comparison purposes

The second line for each class of shares in the table below provides information about hypothetical account values and hypothetical expenses based on that Fund's actual expense ratios for each class of shares and an assumed rate of return of 5% per year before expenses, which is not that Fund's actual return for each class of shares. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in a Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs (as applicable), such as sales charges (loads). Therefore, the second line in the table for each class of shares is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

This projection assumes that annualized expense ratios were in effect during the period July 1, 2009 to December 31, 2009.

55

The UBS Funds

December 31, 2009 (unaudited)

		Beginning account value July 1, 2009		Ending account value December 31, 2009		Expenses paid during period* 07/01/09 – 12/31/09		Expense ratio during period
UBS Absolute Return Bond Fund
Class A	Actual	$	1,000.00	$	1,031.40	$	5.12		1.00	%
	Hypothetical (5% annual return before expenses)		1,000.00		1,020.16		5.09		1.00
Class C	Actual		1,000.00		1,029.50		6.91		1.35
	Hypothetical (5% annual return before expenses)		1,000.00		1,018.40		6.87		1.35
Class Y	Actual		1,000.00		1,032.30		4.30		0.84
	Hypothetical (5% annual return before expenses)		1,000.00		1,020.97		4.28		0.84
UBS Global Bond Fund
Class A	Actual		1,000.00		1,077.60		6.02		1.15
	Hypothetical (5% annual return before expenses)		1,000.00		1,019.41		5.85		1.15
Class B	Actual		1,000.00		1,073.40		9.93		1.90
	Hypothetical (5% annual return before expenses)		1,000.00		1,015.63		9.65		1.90
Class C	Actual		1,000.00		1,076.60		8.64		1.65
	Hypothetical (5% annual return before expenses)		1,000.00		1,016.89		8.39		1.65
Class Y	Actual		1,000.00		1,079.30		4.72		0.90
	Hypothetical (5% annual return before expenses)		1,000.00		1,020.67		4.58		0.90
UBS High Yield Fund
Class A	Actual		1,000.00		1,208.90		6.68		1.20
	Hypothetical (5% annual return before expenses)		1,000.00		1,019.16		6.11		1.20
Class B	Actual		1,000.00		1,204.30		10.83		1.95
	Hypothetical (5% annual return before expenses)		1,000.00		1,015.38		9.91		1.95
Class C	Actual		1,000.00		1,205.90		9.45		1.70
	Hypothetical (5% annual return before expenses)		1,000.00		1,016.64		8.64		1.70
Class Y	Actual		1,000.00		1,208.80		5.29		0.95
	Hypothetical (5% annual return before expenses)		1,000.00		1,020.42		4.84		0.95

*  Expenses are equal to the Fund's annualized net expense ratios, multiplied by the average account value over the period, multiplied by 184 divided by 365 (to reflect the one-half year period).

56

The UBS Funds

December 31, 2009 (unaudited)

		Beginning account value July 1, 2009		Ending account value December 31, 2009		Expenses paid during period* 07/01/09 – 12/31/09		Expense ratio during period
UBS U.S. Bond Fund
Class A	Actual	$	1,000.00	$	1,071.00	$	3.34		0.64	%
	Hypothetical (5% annual return before expenses)		1,000.00		1,021.98		3.26		0.64
Class B	Actual		1,000.00		1,066.90		7.24		1.39
	Hypothetical (5% annual return before expenses)		1,000.00		1,018.20		7.07		1.39
Class C	Actual		1,000.00		1,067.20		5.94		1.14
	Hypothetical (5% annual return before expenses)		1,000.00		1,019.46		5.80		1.14
Class Y	Actual		1,000.00		1,072.40		2.04		0.39
	Hypothetical (5% annual return before expenses)		1,000.00		1,023.24		1.99		0.39

57

The UBS Funds

Financial statements

Statement of assets and liabilities
December 31, 2009 (unaudited)

	UBS Absolute Return Bond Fund		UBS Global Bond Fund
Assets:
Investments, at cost:
Unaffiliated issuers	$	141,140,521	$	24,086,209
Affiliated issuers		5,709,497		—
Investments of cash collateral in affiliated issuers received from securities loaned, at cost		—		—
Foreign currency, at cost		1,138,239		79,981
	$	147,988,257	$	24,166,190
Investments, at value:
Unaffiliated issuers	$	140,666,308	$	24,303,946
Affiliated issuers		5,709,497		—
Investments of cash collateral in affiliated issuers received from securities loaned, at value1		—		—
Foreign currency, at value		1,122,203		79,218
Cash		2,513		—
Receivables:
Investment securities sold		—		1,593,973
Due from advisor		—		21,100
Interest		2,550,368		415,115
Fund shares sold		27,104		317,638
Variation margin		186,054		1,125
Foreign tax reclaims		39,483		—
Cash collateral for futures contracts		1,957,162		9,341
Outstanding swap agreements, at value2		72,473		3,109
Unrealized appreciation on forward foreign currency contracts		3,615,764		205,892
Other assets		9,078		1,891
Total assets		155,958,007		26,952,348
Liabilities:
Payables:
Cash collateral from securities loaned		—		—
Investment securities purchased		—		1,053,799
Investment advisory and fund administration fees		79,883		16,926
Fund shares redeemed		172,180		805,006
Custody and fund accounting fees		13,498		8,995
Distribution and service fees		3,701		3,333
Trustees' fees		9,870		4,912
Due to custodian		—		685,113
Payable for bank loan		—		—
Accrued expenses		91,459		34,862
Outstanding swap agreements, at value2		416,744		65,554
Unrealized depreciation on forward foreign currency contracts		1,052,447		104,406
Total liabilities		1,839,782		2,782,906
Net assets	$	154,118,225	$	24,169,442

¹  The market value of securities loaned by UBS U.S. Bond Fund as of December 31, 2009 was $1,148,373.

²  Net upfront payments made by UBS Absolute Return Bond Fund were $16,815.

58

The UBS Funds

Financial statements

	UBS High Yield Fund		UBS U.S. Bond Fund
Assets:
Investments, at cost:
Unaffiliated issuers	$	78,602,280	$	47,287,664
Affiliated issuers		17,940		4,569,876
Investments of cash collateral in affiliated issuers received from securities loaned, at cost		—		484,809
Foreign currency, at cost		—		—
	$	78,620,220	$	52,342,349
Investments, at value:
Unaffiliated issuers	$	86,722,117	$	47,343,988
Affiliated issuers		17,940		5,082,641
Investments of cash collateral in affiliated issuers received from securities loaned, at value1		—		484,809
Foreign currency, at value		—		—
Cash		—		302,578
Receivables:
Investment securities sold		1,072,746		5,299,665
Due from advisor		13,160		37,800
Interest		1,755,473		328,627
Fund shares sold		326,037		5,187
Variation margin		—		9,227
Foreign tax reclaims		—		—
Cash collateral for futures contracts		—		20,728
Outstanding swap agreements, at value2		—		59,936
Unrealized appreciation on forward foreign currency contracts		—		—
Other assets		5,212		3,835
Total assets		89,912,685		58,979,021
Liabilities:
Payables:
Cash collateral from securities loaned		—		484,809
Investment securities purchased		—		6,104,986
Investment advisory and fund administration fees		50,958		27,527
Fund shares redeemed		607,551		1,523,146
Custody and fund accounting fees		7,706		8,719
Distribution and service fees		13,903		3,665
Trustees' fees		5,955		5,433
Due to custodian		—		—
Payable for bank loan		472,691		—
Accrued expenses		55,035		30,376
Outstanding swap agreements, at value2		—		401,377
Unrealized depreciation on forward foreign currency contracts		—		—
Total liabilities		1,213,799		8,590,038
Net assets	$	88,698,886	$	50,388,983

See accompanying notes to financial statements.
59

The UBS Funds

Financial statements

Statement of assets and liabilities (cont'd)
December 31, 2009 (unaudited)

	UBS Absolute Return Bond Fund1			UBS Global Bond Fund
Net assets consist of:
Beneficial interest	$	281,750,030		$	39,422,194
Accumulated undistributed (distributions in excess of) net investment income		(2,848,682	)		102,967
Accumulated net realized loss		(128,566,407	)		(15,603,626	)
Net unrealized appreciation		3,783,284			247,907
Net assets	$	154,118,225		$	24,169,442
Class A
Net assets	$	14,781,202		$	8,283,799
Shares outstanding		2,288,584			1,097,035
Net asset value and redemption proceeds per share	$	6.46		$	7.55
Offering price per share (NAV per share plus maximum sales charge)2	$	6.63		$	7.91
Class B
Net assets		—		$	149,088
Shares outstanding		—			19,685
Net asset value and offering price per share		—		$	7.57
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2		—		$	7.19
Class C
Net assets	$	4,161,777		$	2,225,161
Shares outstanding		644,448			295,662
Net asset value and offering price per share	$	6.46		$	7.53
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	6.43		$	7.47
Class Y
Net assets	$	135,175,246		$	13,511,394
Shares outstanding		20,944,262			1,568,737
Net asset value per share, offering price per share, and redemption proceeds per share	$	6.45		$	8.61

¹  UBS Absolute Return Bond Fund does not offer Class B Shares.

²  For Class A, the maximum sales charge is 4.50% for UBS Global Bond Fund, UBS High Yield Fund and UBS U.S. Bond Fund, and 2.50% for UBS Absolute Return Bond Fund. Classes B, C and Y have no front-end sales charges. For Class A shares of each Fund except UBS Absolute Return Bond Fund, the maximum contingent deferred sales charge of 1.00% of the shares' offering price or the net asset value at the time of sales by the shareholder, whichever is less, is charged on sales of shares on original purchases of $1,000,000 or more that were not subject to a front-end sales charge made within one year of the purchase date. For Class A shares of the UBS Absolute Return Bond Fund, the maximum contingent deferred sales charge of 0.50% of the shares' offering price or the net asset value at the time of sales by the shareholder, whichever is less, is charged on sales of shares on original purchases of $250,000 or more that were not subject to a front end sales charge made within one year of the purchase date. For Class B, the maximum contingent deferred sales charge is 5.00%. For Class C, the maximum contingent deferred sales charge is 0.75% for UBS Global Bond Fund, UBS High Yield Fund and UBS U.S. Bond Fund, and 0.50% for UBS Absolute Return Bond Fund. Class Y has no contingent deferred sales charge.

60

The UBS Funds

Financial statements

	UBS High Yield Fund			UBS U.S. Bond Fund
Net assets consist of:
Beneficial interest	$	213,690,362		$	87,990,284
Accumulated undistributed (distributions in excess of) net investment income		292,235			(68,113	)
Accumulated net realized loss		(133,403,548	)		(37,803,175	)
Net unrealized appreciation		8,119,837			269,987
Net assets	$	88,698,886		$	50,388,983
Class A
Net assets	$	36,514,847		$	8,561,796
Shares outstanding		6,161,811			1,018,340
Net asset value and redemption proceeds per share	$	5.93		$	8.41
Offering price per share (NAV per share plus maximum sales charge)2	$	6.21		$	8.81
Class B
Net assets	$	968,030		$	107,901
Shares outstanding		163,286			12,820
Net asset value and offering price per share	$	5.93		$	8.42
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	5.63		$	8.00
Class C
Net assets	$	8,732,983		$	2,631,417
Shares outstanding		1,472,636			313,927
Net asset value and offering price per share	$	5.93		$	8.38
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	5.89		$	8.32
Class Y
Net assets	$	42,483,026		$	39,087,869
Shares outstanding		7,114,696			4,654,713
Net asset value per share, offering price per share, and redemption proceeds per share	$	5.97		$	8.40

See accompanying notes to financial statements.
61

The UBS Funds

Financial statements

Statement of operations
For the six months ended December 31, 2009 (unaudited)

	UBS Absolute Return Bond Fund			UBS Global Bond Fund
Investment income:
Dividends	$	—		$	—
Interest and other		2,629,748			561,896
Affiliated interest		4,825			1,229
Securities lending-net		—			—
Foreign tax withheld		(2,722	)		(250	)
Total income		2,631,851			562,875
Expenses:
Advisory and administration		486,123			115,592
Service and distribution:
Class A		12,282			10,508
Class B		—			686
Class C		11,946			7,951
Transfer agency and related service fees:
Class A		16,984			6,043
Class B		—			135
Class C		2,935			911
Class Y		1,795			25,832
Custodian and fund accounting		40,026			27,011
Federal and state registration		18,070			29,939
Professional services		57,989			50,234
Shareholder reports		24,581			7,147
Trustees		16,648			9,809
Other		10,033			5,518
Total expenses		699,412			297,316
Fee waivers and/or expense reimbursements by Advisor		(18,823	)		(134,752	)
Net operating expenses		680,589			162,564
Interest expense		—			—
Net expenses		680,589			162,564
Net investment income		1,951,262			400,311
Net realized gain (loss) on:
Investments in unaffiliated issuers		(400,819	)		181,892
Investments in affiliated issuers		—			—
Futures contracts		(4,206,832	)		13,168
Swap agreements		(123,178	)		289
Foreign currency transactions		(5,538,988	)		930,372
Net realized gain (loss)		(10,269,817	)		1,125,721
Change in net unrealized appreciation (depreciation) on:
Investments		4,725,268			987,748
Futures contracts		1,865,646			(2,396	)
Swap agreements		(115,344	)		(28,567	)
Foreign forward currency contracts		6,814,502			154,508
Translation of other assets and liabilities denominated in foreign currency		(58,174	)		(27,394	)
Change in net unrealized appreciation		13,231,898			1,083,899
Net realized and unrealized gain		2,962,081			2,209,620
Net increase in net assets resulting from operations	$	4,913,343		$	2,609,931

62

The UBS Funds

Financial statements

	UBS High Yield Fund			UBS U.S. Bond Fund
Investment income:
Dividends	$	6,727		$	—
Interest and other		5,067,404			1,166,721
Affiliated interest		1,341			2,974
Securities lending-net		—			2,610
Foreign tax withheld		—			(3,859	)
Total income		5,075,472			1,168,446
Expenses:
Advisory and administration		308,800			182,791
Service and distribution:
Class A		45,439			11,761
Class B		4,682			555
Class C		29,942			10,061
Transfer agency and related service fees:
Class A		29,793			6,464
Class B		1,245			143
Class C		6,935			1,229
Class Y		40,043			31,240
Custodian and fund accounting		23,241			26,888
Federal and state registration		22,827			33,739
Professional services		47,146			44,582
Shareholder reports		17,546			11,257
Trustees		11,697			10,820
Other		8,377			6,960
Total expenses		597,713			378,490
Fee waivers and/or expense reimbursements by Advisor		(83,214	)		(232,167	)
Net operating expenses		514,499			146,323
Interest expense		94			—
Net expenses		514,593			146,323
Net investment income		4,560,879			1,022,123
Net realized gain (loss) on:
Investments in unaffiliated issuers		1,053,885			(1,166,250	)
Investments in affiliated issuers		—			1,576,907
Futures contracts		—			(107,025	)
Swap agreements		—			627,870
Foreign currency transactions		—			—
Net realized gain (loss)		1,053,885			931,502
Change in net unrealized appreciation (depreciation) on:
Investments		11,517,658			2,654,889
Futures contracts		—			26,838
Swap agreements		—			(167,609	)
Foreign forward currency contracts		—			—
Translation of other assets and liabilities denominated in foreign currency		—			—
Change in net unrealized appreciation		11,517,658			2,514,118
Net realized and unrealized gain		12,571,543			3,445,620
Net increase in net assets resulting from operations	$	17,132,422		$	4,467,743

See accompanying notes to financial statements.
63

The UBS Funds

Financial statements

Statement of changes in net assets (unaudited)

	UBS Absolute Return Bond Fund						UBS Global Bond Fund
	Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009			Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009
Operations:
Net investment income	$	1,951,262		$	3,230,577		$	400,311		$	1,588,894
Net realized gain (loss)		(10,269,817	)		(33,872,890	)		1,125,721			(10,855,664	)
Change in net unrealized appreciation		13,231,898			12,020,179			1,083,899			3,201,849
Net increase (decrease) in net assets from operations		4,913,343			(18,622,134	)		2,609,931			(6,064,921	)
Dividends and distributions to shareholders by class:
Class A:
Net investment income and net foreign currency gains		(211,447	)		(2,667,309	)		(133,293	)		(1,516,275	)
Class B:
Net investment income and net foreign currency gains		—			—			(1,721	)		(19,560	)
Class C:
Net investment income and net foreign currency gains		(53,290	)		(658,994	)		(28,841	)		(259,857	)
Class Y:
Net investment income and net foreign currency gains		(1,947,457	)		(13,660,426	)		(302,524	)		(6,148,254	)
Decrease in net assets from dividends and distributions		(2,212,194	)		(16,986,729	)		(466,379	)		(7,943,946	)
Beneficial interest transactions:
Proceeds from shares sold		589,377			3,120,247			7,039,459			36,103,750
Shares issued on reinvestment of dividends and distributions		2,186,897			16,649,066			444,091			7,709,896
Cost of shares redeemed		(5,289,291	)		(78,413,871	)		(19,802,887	)		(62,052,653	)
Redemption fees		—			6,753			—			3,335
Net decrease in net assets resulting from beneficial interest transactions		(2,513,017	)		(58,637,805	)		(12,319,337	)		(18,235,672	)
Increase (decrease) in net assets		188,132			(94,426,668	)		(10,175,785	)		(32,244,539	)
Net assets, beginning of period		153,930,093			248,176,761			34,345,227			66,589,766
Net assets, end of period	$	154,118,225		$	153,930,093		$	24,169,442		$	34,345,227
Net assets include accumulated undistributed (distributions in excess of) net investment income	$	(2,848,682	)	$	(2,587,750	)	$	102,967		$	169,035

64

The UBS Funds

Financial statements

	UBS High Yield Fund						UBS U.S. Bond Fund
	Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009			Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009
Operations:
Net investment income	$	4,560,879		$	11,204,500		$	1,022,123		$	2,418,809
Net realized gain (loss)		1,053,885			(31,537,593	)		931,502			(18,475,305	)
Change in net unrealized appreciation		11,517,658			8,703,449			2,514,118			11,415,740
Net increase (decrease) in net assets from operations		17,132,422			(11,626,644	)		4,467,743			(4,640,756	)
Dividends and distributions to shareholders by class:
Class A:
Net investment income and net foreign currency gains		(1,815,604	)		(3,772,743	)		(355,651	)		(634,150	)
Class B:
Net investment income and net foreign currency gains		(43,416	)		(93,997	)		(3,866	)		(10,106	)
Class C:
Net investment income and net foreign currency gains		(382,701	)		(649,853	)		(97,430	)		(101,001	)
Class Y:
Net investment income and net foreign currency gains		(2,307,196	)		(7,095,294	)		(1,892,856	)		(5,778,806	)
Decrease in net assets from dividends and distributions		(4,548,917	)		(11,611,887	)		(2,349,803	)		(6,524,063	)
Beneficial interest transactions:
Proceeds from shares sold		6,719,590			29,315,974			9,712,527			47,460,979
Shares issued on reinvestment of dividends and distributions		3,615,852			9,810,068			2,259,187			6,388,526
Cost of shares redeemed		(43,472,480	)		(56,711,483	)		(30,663,379	)		(88,912,663	)
Redemption fees		311			26,029			3,343			17,108
Net decrease in net assets resulting from beneficial interest transactions		(33,136,727	)		(17,559,412	)		(18,688,322	)		(35,046,050	)
Increase (decrease) in net assets		(20,553,222	)		(40,800,943	)		(16,570,382	)		(46,210,869	)
Net assets, beginning of period		109,252,108			150,053,051			66,959,365			113,170,234
Net assets, end of period	$	88,698,886		$	109,252,108		$	50,388,983		$	66,959,365
Net assets include accumulated undistributed (distributions in excess of) net investment income	$	292,235		$	280,273		$	(68,113	)	$	1,259,567

See accompanying notes to financial statements.
65

UBS Absolute Return Bond Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,												For the period ended June 30,
	(unaudited)			2009			2008			2007			2006			20055
Net asset value, beginning of period	$	6.35		$	7.81		$	10.05		$	10.14		$	9.98		$	10.00
Income (loss) from investment operations:
Net investment income1		0.08			0.13			0.34			0.35			0.28			0.03
Net realized and unrealized gain (loss) from investment activities		0.08			(0.88	)		(2.13	)		(0.06	)		0.18			(0.02	)
Total income (loss) from investment operations		0.16			(0.75	)		(1.79	)		0.29			0.46			0.01
Less dividends/distributions:
From net investment income		(0.05	)		(0.71	)		(0.45	)		(0.30	)		(0.29	)		(0.03	)
From net realized gains		—			—			—			(0.08	)		(0.01	)		—
Total dividends/distributions		(0.05	)		(0.71	)		(0.45	)		(0.38	)		(0.30	)		(0.03	)
Net asset value, end of period	$	6.46		$	6.35		$	7.81		$	10.05		$	10.14		$	9.98
Total investment return2		3.14	%		(9.48	)%		(18.07	)%		2.87	%		4.65	%		0.06	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	14,781		$	17,850		$	50,761		$	257,180		$	212,983		$	105,373
Ratio of expenses to average assets:
Before expense reimbursement		1.20	%3		1.12	%		0.99	%		0.95	%		0.96	%		1.31	%3
After expense reimbursement/recoupment		1.00	%3		1.00	%		0.99	%		0.95	%		0.99	%4		1.00	%3
Ratio of net investment income to average net assets		2.38	%3		1.85	%		3.68	%		3.43	%		2.78	%		1.75	%3
Portfolio turnover rate		15	%		99	%		33	%		56	%		96	%		22	%

	Class Y
	Six months ended December 31, 2009			Year ended June 30,												For the period ended June 30,
	(unaudited)			2009			2008			2007			2006			20055
Net asset value, beginning of period	$	6.34		$	7.81		$	10.05		$	10.15		$	9.98		$	10.00
Income (loss) from investment operations:
Net investment income1		0.08			0.13			0.36			0.37			0.30			0.03
Net realized and unrealized gain (loss) from investment activities		0.08			(0.88	)		(2.12	)		(0.07	)		0.19			(0.02	)
Total income (loss) from investment operations		0.16			(0.75	)		(1.76	)		0.30			0.49			0.01
Less dividends/distributions:
From net investment income		(0.05	)		(0.72	)		(0.48	)		(0.32	)		(0.31	)		(0.03	)
From net realized gains		—			—			—			(0.08	)		(0.01	)		—
Total dividends/distributions		(0.05	)		(0.72	)		(0.48	)		(0.40	)		(0.32	)		(0.03	)
Net asset value, end of period	$	6.45		$	6.34		$	7.81		$	10.05		$	10.15		$	9.98
Total investment return2		3.23	%		(9.32	)%		(17.92	)%		2.96	%		4.94	%		0.09	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	135,175		$	130,933		$	187,445		$	259,089		$	232,208		$	20,004
Ratio of expenses to average assets:
Before expense reimbursement		0.84	%3		0.83	%		0.76	%		0.75	%		0.77	%		1.11	%3
After expense reimbursement		0.84	%3		0.83	%		0.76	%		0.75	%		0.77	%		0.85	%3
Ratio of net investment income to average net assets		2.54	%3		1.94	%		3.92	%		3.63	%		3.00	%		1.90	%3
Portfolio turnover rate		15	%		99	%		33	%		56	%		96	%		22	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Annualized.

⁴  The investment manager recouped expenses previously reimbursed by the investment manager on behalf of the Fund, not to exceed the expense cap.

⁵  For the period April 27, 2005 (commencement of operations) through June 30, 2005.

66

UBS Absolute Return Bond Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,												For the period ended June 30,
	(unaudited)			2009			2008			2007			2006			20055
Net asset value, beginning of period	$	6.35		$	7.81		$	10.04		$	10.14		$	9.98		$	10.00
Income (loss) from investment operations:
Net investment income1		0.07			0.10			0.31			0.31			0.24			0.02
Net realized and unrealized gain (loss) from investment activities		0.08			(0.87	)		(2.12	)		(0.06	)		0.18			(0.02	)
Total income (loss) from investment operations		0.15			(0.77	)		(1.81	)		0.25			0.42			—
Less dividends/distributions:
From net investment income		(0.04	)		(0.69	)		(0.42	)		(0.27	)		(0.25	)		(0.02	)
From net realized gains		—			—			—			(0.08	)		(0.01	)		—
Total dividends/distributions		(0.04	)		(0.69	)		(0.42	)		(0.35	)		(0.26	)		(0.02	)
Net asset value, end of period	$	6.46		$	6.35		$	7.81		$	10.04		$	10.14		$	9.98
Total investment return2		2.95	%		(9.81	)%		(18.27	)%		2.42	%		4.30	%		0.01	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	4,162		$	5,147		$	9,971		$	37,548		$	30,618		$	16,973
Ratio of expenses to average assets:
Before expense reimbursement		1.46	%3		1.42	%		1.32	%		1.29	%		1.32	%		1.68	%3
After expense reimbursement/recoupment		1.35	%3		1.35	%		1.32	%		1.30	%4		1.35	%4		1.35	%3
Ratio of net investment income to average net assets		2.03	%3		1.46	%		3.35	%		3.07	%		2.42	%		1.40	%3
Portfolio turnover rate		15	%		99	%		33	%		56	%		96	%		22	%

See accompanying notes to financial statements.
67

UBS Global Bond Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	7.12		$	9.17		$	9.41		$	9.50		$	9.83		$	9.87
Income (loss) from investment operations:
Net investment income1		0.09			0.22			0.27			0.26			0.19			0.17
Net realized and unrealized gain (loss) from investment activities		0.46			(0.92	)		(0.08	)		(0.10	)		(0.15	)		0.34
Total income (loss) from investment operations		0.55			(0.70	)		0.19			0.16			0.04			0.51
Less dividends/distributions:
From net investment income		(0.12	)		(1.35	)		(0.43	)		(0.25	)		(0.37	)		(0.55	)
Net asset value, end of period	$	7.55		$	7.12		$	9.17		$	9.41		$	9.50		$	9.83
Total investment return2		7.76	%		(7.66	)%		1.94	%		1.67	%		0.51	%		5.05	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	8,284		$	7,930		$	12,123		$	14,093		$	15,546		$	16,701
Ratio of expenses to average net assets:
Before expense reimbursement		1.93	%3		1.68	%		1.31	%		1.40	%		1.48	%		1.48	%
After expense reimbursement		1.15	%3		1.15	%		1.15	%		1.15	%		1.15	%		1.15	%
Ratio of net investment income to average net assets		2.37	%3		2.90	%		2.81	%		2.67	%		1.97	%		1.65	%
Portfolio turnover rate		34	%		116	%		137	%		74	%		114	%		112	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	7.14		$	9.20		$	9.43		$	9.52		$	9.85		$	9.88
Income (loss) from investment operations:
Net investment income1		0.06			0.17			0.20			0.18			0.12			0.09
Net realized and unrealized gain (loss) from investment activities		0.46			(0.93	)		(0.08	)		(0.09	)		(0.15	)		0.35
Total income (loss) from investment operations		0.52			(0.76	)		0.12			0.09			(0.03	)		0.44
Less dividends/distributions:
From net investment income		(0.09	)		(1.30	)		(0.35	)		(0.18	)		(0.30	)		(0.47	)
Net asset value, end of period	$	7.57		$	7.14		$	9.20		$	9.43		$	9.52		$	9.85
Total investment return2		7.34	%		(8.45	)%		1.27	%		0.90	%		(0.26	)%		4.29	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	149		$	122		$	131		$	215		$	420		$	1,153
Ratio of expenses to average net assets:
Before expense reimbursement		2.74	%3		2.55	%		2.20	%		2.17	%		2.25	%		2.30	%
After expense reimbursement		1.90	%3		1.90	%		1.90	%		1.90	%		1.90	%		1.90	%
Ratio of net investment income to average net assets		1.63	%3		2.15	%		2.06	%		1.92	%		1.22	%		0.90	%
Portfolio turnover rate		34	%		116	%		137	%		74	%		114	%		112	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Annualized.

68

UBS Global Bond Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	7.09		$	9.15		$	9.38		$	9.47		$	9.81		$	9.85
Income (loss) from investment operations:
Net investment income1		0.07			0.18			0.22			0.21			0.14			0.12
Net realized and unrealized gain (loss) from investment activities		0.47			(0.92	)		(0.07	)		(0.10	)		(0.15	)		0.35
Total income (loss) from investment operations		0.54			(0.74	)		0.15			0.11			(0.01	)		0.47
Less dividends/distributions:
From net investment income		(0.10	)		(1.32	)		(0.38	)		(0.20	)		(0.33	)		(0.51	)
Net asset value, end of period	$	7.53		$	7.09		$	9.15		$	9.38		$	9.47		$	9.81
Total investment return2		7.66	%		(8.27	)%		1.56	%		1.17	%		(0.09	)%		4.60	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	2,225		$	1,856		$	1,716		$	1,491		$	2,426		$	3,081
Ratio of expenses to average net assets:
Before expense reimbursement		2.38	%3		2.17	%		1.79	%		1.77	%		1.88	%		1.92	%
After expense reimbursement		1.65	%3		1.65	%		1.65	%		1.65	%		1.65	%		1.65	%
Ratio of net investment income to average net assets		1.87	%3		2.37	%		2.31	%		2.17	%		1.47	%		1.15	%
Portfolio turnover rate		34	%		116	%		137	%		74	%		114	%		112	%
	Class Y
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	8.10		$	10.24		$	10.45		$	10.51		$	10.84		$	10.83
Income (loss) from investment operations:
Net investment income1		0.11			0.28			0.32			0.31			0.23			0.21
Net realized and unrealized gain (loss) from investment activities		0.53			(1.05	)		(0.08	)		(0.10	)		(0.17	)		0.38
Total income (loss) from investment operations		0.64			(0.77	)		0.24			0.21			0.06			0.59
Less dividends/distributions:
From net investment income		(0.13	)		(1.37	)		(0.45	)		(0.27	)		(0.39	)		(0.58	)
Net asset value, end of period	$	8.61		$	8.10		$	10.24		$	10.45		$	10.51		$	10.84
Total investment return2		7.93	%		(7.54	)%		2.28	%		2.03	%		0.65	%		5.36	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	13,511		$	24,437		$	52,620		$	107,465		$	80,536		$	52,345
Ratio of expenses to average net assets:
Before expense reimbursement		1.78	%3		1.44	%		1.04	%		1.03	%		1.16	%		1.16	%
After expense reimbursement		0.90	%3		0.90	%		0.90	%		0.90	%		0.90	%		0.90	%
Ratio of net investment income to average net assets		2.64	%3		3.15	%		3.06	%		2.93	%		2.22	%		1.90	%
Portfolio turnover rate		34	%		116	%		137	%		74	%		114	%		112	%

See accompanying notes to financial statements.
69

UBS High Yield Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	5.16		$	6.19		$	6.92		$	6.89		$	7.14		$	7.06
Income (loss) from investment operations:
Net investment income1		0.28			0.50			0.51			0.50			0.55			0.57
Net realized and unrealized gain (loss) from investment activities		0.78			(1.00	)		(0.75	)		0.08			(0.24	)		0.10
Total income (loss) from investment operations		1.06			(0.50	)		(0.24	)		0.58			0.31			0.67
Less dividends/distributions:
From net investment income		(0.29	)		(0.53	)		(0.49	)		(0.55	)		(0.56	)		(0.59	)
Net asset value, end of period	$	5.93		$	5.16		$	6.19		$	6.92		$	6.89		$	7.14
Total investment return2		20.89	%		(7.12	)%		(3.55	)%		8.60	%		4.48	%		9.66	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	36,515		$	39,859		$	40,582		$	45,031		$	51,121		$	66,677
Ratio of expenses to average net assets:
Before expense reimbursement		1.38	%3		1.33	%		1.29	%		1.28	%		1.37	%		1.28	%
After expense reimbursement		1.20	%3		1.20	%		1.20	%		1.20	%		1.20	%		1.20	%
Ratio of net investment income to average net assets		9.88	%3		9.96	%		7.81	%		7.16	%		7.86	%		7.83	%
Portfolio turnover rate		31	%		92	%		39	%		46	%		64	%		61	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	5.16		$	6.20		$	6.93		$	6.89		$	7.14		$	7.06
Income (loss) from investment operations:
Net investment income1		0.26			0.46			0.46			0.45			0.50			0.51
Net realized and unrealized gain (loss) from investment activities		0.77			(1.01	)		(0.75	)		0.09			(0.25	)		0.10
Total income (loss) from investment operations		1.03			(0.55	)		(0.29	)		0.54			0.25			0.61
Less dividends/distributions:
From net investment income		(0.26	)		(0.49	)		(0.44	)		(0.50	)		(0.50	)		(0.53	)
Net asset value, end of period	$	5.93		$	5.16		$	6.20		$	6.93		$	6.89		$	7.14
Total investment return2		20.43	%		(7.98	)%		(4.27	)%		7.93	%		3.69	%		8.79	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	968		$	900		$	1,480		$	2,386		$	2,497		$	3,945
Ratio of expenses to average net assets:
Before expense reimbursement		2.23	%3		2.15	%		2.07	%		2.04	%		2.09	%		1.99	%
After expense reimbursement		1.95	%3		1.95	%		1.95	%		1.95	%		1.95	%		1.95	%
Ratio of net investment income to average net assets		9.13	%3		9.01	%		7.02	%		6.42	%		7.11	%		7.08	%
Portfolio turnover rate		31	%		92	%		39	%		46	%		64	%		61	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Annualized.

70

UBS High Yield Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	5.16		$	6.19		$	6.93		$	6.89		$	7.14		$	7.06
Income (loss) from investment operations:
Net investment income1		0.27			0.48			0.48			0.47			0.52			0.53
Net realized and unrealized gain (loss) from investment activities		0.77			(1.01	)		(0.76	)		0.08			(0.25	)		0.10
Total income (loss) from investment operations		1.04			(0.53	)		(0.28	)		0.55			0.27			0.63
Less dividends/distributions:
From net investment income		(0.27	)		(0.50	)		(0.46	)		(0.51	)		(0.52	)		(0.55	)
Net asset value, end of period	$	5.93		$	5.16		$	6.19		$	6.93		$	6.89		$	7.14
Total investment return2		20.59	%		(7.60	)%		(4.03	)%		8.05	%		3.95	%		9.09	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	8,733		$	7,072		$	8,453		$	11,330		$	12,177		$	15,389
Ratio of expenses to average net assets:
Before expense reimbursement		1.89	%3		1.86	%		1.79	%		1.78	%		1.86	%		1.79	%
After expense reimbursement		1.70	%3		1.70	%		1.70	%		1.70	%		1.70	%		1.70	%
Ratio of net investment income to average net assets		9.36	%3		9.41	%		7.31	%		6.66	%		7.36	%		7.33	%
Portfolio turnover rate		31	%		92	%		39	%		46	%		64	%		61	%
	Class Y
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	5.20		$	6.23		$	6.96		$	6.92		$	7.17		$	7.10
Income (loss) from investment operations:
Net investment income1		0.29			0.52			0.53			0.52			0.57			0.59
Net realized and unrealized gain (loss) from investment activities		0.77			(1.01	)		(0.75	)		0.09			(0.24	)		0.09
Total income (loss) from investment operations		1.06			(0.49	)		(0.22	)		0.61			0.33			0.68
Less dividends/distributions:
From net investment income		(0.29	)		(0.54	)		(0.51	)		(0.57	)		(0.58	)		(0.61	)
Net asset value, end of period	$	5.97		$	5.20		$	6.23		$	6.96		$	6.92		$	7.17
Total investment return2		20.88	%		(6.83	)%		(3.28	)%		8.98	%		4.72	%		9.82	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	42,483		$	61,421		$	99,538		$	47,768		$	33,015		$	30,277
Ratio of expenses to average net assets:
Before expense reimbursement		1.13	%3		1.06	%		0.99	%		0.98	%		1.06	%		0.96	%
After expense reimbursement		0.95	%3		0.95	%		0.95	%		0.95	%		0.95	%		0.95	%
Ratio of net investment income to average net assets		10.17	%3		10.07	%		8.13	%		7.43	%		8.11	%		8.08	%
Portfolio turnover rate		31	%		92	%		39	%		46	%		64	%		61	%

See accompanying notes to financial statements.
71

UBS U.S. Bond Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	8.17		$	9.13		$	10.46		$	10.27		$	10.73		$	10.56
Income (loss) from investment operations:
Net investment income1		0.13			0.23			0.25			0.32			0.40			0.39
Net realized and unrealized gain (loss) from investment activities		0.45			(0.54	)		(1.06	)		0.24			(0.42	)		0.20
Net increase from payment by Advisor		—			—			—			0.004			—			—
Total income (loss) from investment operations		0.58			(0.31	)		(0.81	)		0.56			(0.02	)		0.59
Redemption fees		0.004			0.01			0.01			—			—			—
Less dividends/distributions:
From net investment income		(0.34	)		(0.64	)		(0.53	)		(0.37	)		(0.44	)		(0.42	)
Net asset value, end of period	$	8.41		$	8.17		$	9.13		$	10.46		$	10.27		$	10.73
Total investment return2		7.10	%		(3.29	)%		(8.03	)%		5.39	%		(0.07	)%		5.72	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	8,562		$	9,128		$	9,330		$	29,356		$	31,285		$	34,282
Ratio of expenses to average net assets:
Before expense reimbursement		1.39	%3		1.27	%		1.02	%		1.07	%		1.07	%		1.19	%
After expense reimbursement		0.64	%3		0.85	%		0.85	%		0.85	%		0.85	%		0.85	%
Ratio of net investment income to average net assets		3.03	%3		2.71	%		2.05	%		3.08	%		3.79	%		3.61	%
Portfolio turnover rate		158	%		247	%		192	%		209	%		229	%		174	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	8.18		$	9.14		$	10.47		$	10.28		$	10.74		$	10.56
Income (loss) from investment operations:
Net investment income1		0.10			0.16			0.18			0.25			0.32			0.31
Net realized and unrealized gain (loss) from investment activities		0.44			(0.54	)		(1.07	)		0.23			(0.42	)		0.21
Net increase from payment by Advisor		—			—			—			0.004			—			—
Total income (loss) from investment operations		0.54			(0.38	)		(0.89	)		0.48			(0.10	)		0.52
Redemption fees		—			0.004			0.01			—			—			—
Less dividends/distributions:
From net investment income		(0.30	)		(0.58	)		(0.45	)		(0.29	)		(0.36	)		(0.34	)
Net asset value, end of period	$	8.42		$	8.18		$	9.14		$	10.47		$	10.28		$	10.74
Total investment return2		6.69	%		(4.01	)%		(8.72	)%		4.70	%		(0.93	)%		4.96	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	108		$	109		$	250		$	442		$	808		$	1,620
Ratio of expenses to average net assets:
Before expense reimbursement		2.26	%3		2.10	%		1.91	%		1.84	%		1.83	%		2.00	%
After expense reimbursement		1.39	%3		1.60	%		1.60	%		1.60	%		1.60	%		1.60	%
Ratio of net investment income to average net assets		2.28	%3		1.89	%		1.77	%		2.39	%		3.04	%		2.86	%
Portfolio turnover rate		158	%		247	%		192	%		209	%		229	%		174	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Annualized.

⁴  Amount represents less than $0.005 per share.

72

UBS U.S. Bond Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	8.15		$	9.12		$	10.45		$	10.26		$	10.72		$	10.55
Income (loss) from investment operations:
Net investment income1		0.11			0.19			0.20			0.27			0.34			0.33
Net realized and unrealized gain (loss) from investment activities		0.44			(0.55	)		(1.05	)		0.24			(0.41	)		0.22
Net increase from payment by Advisor		—			—			—			0.004			—			—
Total income (loss) from investment operations		0.55			(0.36	)		(0.85	)		0.51			(0.07	)		0.55
Redemption fees		—			0.01			—			—			—			—
Less dividends/distributions:
From net investment income		(0.32	)		(0.60	)		(0.48	)		(0.32	)		(0.39	)		(0.38	)
Net asset value, end of period	$	8.38		$	8.15		$	9.12		$	10.45		$	10.26		$	10.72
Total investment return2		6.72	%		(3.76	)%		(8.58	)%		4.98	%		(0.67	)%		5.25	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	2,631		$	2,574		$	1,117		$	1,525		$	1,530		$	2,068
Ratio of expenses to average net assets:
Before expense reimbursement		1.84	%3		1.76	%		1.58	%		1.55	%		1.56	%		1.64	%
After expense reimbursement		1.14	%3		1.35	%		1.35	%		1.35	%		1.35	%		1.35	%
Ratio of net investment income to average net assets		2.53	%3		2.35	%		2.01	%		2.56	%		3.29	%		3.11	%
Portfolio turnover rate		158	%		247	%		192	%		209	%		229	%		174	%
	Class Y
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	8.16		$	9.13		$	10.46		$	10.27		$	10.72		$	10.57
Income (loss) from investment operations:
Net investment income1		0.14			0.24			0.28			0.34			0.42			0.41
Net realized and unrealized gain (loss) from investment activities		0.45			(0.55	)		(1.06	)		0.25			(0.41	)		0.21
Net increase from payment by Advisor		—			—			—			0.004			—			—
Total income (loss) from investment operations		0.59			(0.31	)		(0.78	)		0.59			0.01			0.62
Redemption fees		0.004			—			—			—			—			—
Less dividends/distributions:
From net investment income		(0.35	)		(0.66	)		(0.55	)		(0.40	)		(0.46	)		(0.47	)
Net asset value, end of period	$	8.40		$	8.16		$	9.13		$	10.46		$	10.27		$	10.72
Total investment return2		7.24	%		(3.15	)%		(7.78	)%		5.76	%		0.14	%		5.95	%
Ratios/Supplemental data:
Net assets, end of period (000's)	$	39,088		$	55,149		$	102,473		$	163,172		$	105,526		$	109,568
Ratio of expenses to average net assets:
Before expense reimbursement		1.12	%3		0.96	%		0.78	%		0.76	%		0.82	%		0.78	%
After expense reimbursement		0.39	%3		0.60	%		0.60	%		0.60	%		0.60	%		0.60	%
Ratio of net investment income to average net assets		3.29	%3		2.88	%		2.77	%		3.27	%		4.04	%		3.86	%
Portfolio turnover rate		158	%		247	%		192	%		209	%		229	%		174	%

See accompanying notes to financial statements.
73

The UBS Funds

Notes to financial statements

1. Organization and significant accounting policies

The UBS Funds (the "Trust") is registered with the Securities and Exchange Commission under the Investment Company Act of 1940 (the "1940 Act"), as amended, as an open-end management investment company currently offering multiple series representing separate investment portfolios. The Trust is a Delaware statutory trust organized on August 13, 1993. The trustees of the Trust have the authority to issue an unlimited number of shares of beneficial interest at a par value of $0.001 per share.

The Trust has fourteen Funds available for investment, each having its own investment objectives and policies. The following four funds are covered in this report: UBS Absolute Return Bond Fund, UBS Global Bond Fund, UBS High Yield Fund and UBS U.S. Bond Fund (each a "Fund", and collectively, the "Funds").

Each of the Funds is classified as a "diversified" investment company with the exception of UBS Absolute Return Bond Fund and UBS Global Bond Fund which are classified as "non-diversified" for purposes of the 1940 Act. Each Fund currently offers Class A, Class B, Class C and Class Y shares, except for UBS Absolute Return Bond Fund, which offer Class A, Class C, and Class Y. Effective October 1, 2007, new or additional investments into Class B shares, including investments through an automatic investment plan, are no longer permitted. However, existing Class B shareholders may: (1) continue as Class B shareholders; (2) continue to reinvest dividends and distributions into Class B shares; and (3) exchange their Class B shares for Class B shares of other series of the UBS Family of Funds, as permitted by existing exchange privileges. Each class represents interests in the same assets of the applicable Fund and the classes are ident ical except for differences in their sales charge structures, ongoing service and distribution charges and certain transfer agency and related services expenses. In addition, Class B shares and all corresponding reinvested dividend shares automatically convert to Class A shares within a certain number of years after issuance which varies depending upon the amount invested. All classes of shares have equal voting privileges except that each class has exclusive voting rights with respect to its service and/or distribution plan, if any. Class Y shares have no service or distribution plan.

In the normal course of business, the Funds may enter into contracts that contain a variety of representations that provide general indemnification for certain liabilities. The Funds' maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against the Funds that have not yet occurred. However, the Funds have not had any prior claims or losses pursuant to these contracts and expect the risk of loss to be remote.

The Trust accounts separately for the assets, liabilities and operations of each series. Expenses directly attributable to each series are charged to that series' operations; expenses which are applicable to all series are allocated among them on a pro rata basis.

The preparation of financial statements in accordance with US generally accepted accounting principles requires the Trust's management to make estimates and assumptions that affect the reported amounts and disclosures in the financial statements. Actual results could differ from those estimates. The following is a summary of significant accounting policies:

In June 2009, the Financial Accounting Standards Board ("FASB") established the FASB Accounting Standards Codification^TM ("Codification") as the single source of authoritative accounting principles recognized by the FASB in the preparation of financial statements in conformity with US generally accepted accounting principles ("GAAP"). The Codification supersedes existing nongrandfathered, non-SEC accounting and reporting standards. The Codification did not change GAAP but rather organized it into a hierarchy where all guidance within the Codification carries an equal level of authority. The Codification became effective on July 1, 2009. The Codification did not have a material effect on the Funds' financial statements.

74

The UBS Funds

Notes to financial statements

A: Valuation of investments: Each Fund calculates its net asset value based on the current market value, where available, for its portfolio securities. The Funds normally obtain market values for their securities and other instruments from independent pricing sources and broker-dealers. Independent pricing sources may use reported last sale prices, official market closing prices, current market quotations or valuations from computerized "matrix" systems that derive values based on comparable securities or instruments. A matrix system incorporates parameters such as security quality, maturity and coupon, and/or research and evaluations by its staff, including review of broker-dealer market price quotations, if available, in determining the valuation of the portfolio securities or instruments. Securities traded in the over-the-counter ("OTC") market and listed on The NASDAQ Stock Market, Inc. ("NASDAQ") normally are valued at the NASDAQ Official Closing Price. Other OTC securities are valued at the last bid price on the valuation date available prior to valuation. Securities which are listed on US and foreign stock exchanges normally are valued at the market closing price, the last sale price on the day the securities are valued or, lacking any sales on such day, at the last available bid price. In cases where securities are traded on more than one exchange, the securities are valued on the exchange designated as the primary market by UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the investment advisor of the Funds. If a market value is not available from an independent pricing source for a particular security or instrument, that security or instrument is valued at fair value as determined in good faith by or under the direction of the Trust's Board of Trustees (the "Board"). Various factors may be reviewed in order to make a good faith de termination of a security's or instrument's fair value. These factors include, but are not limited to, fundamental analytical data relating to the investment; the nature and duration of restrictions on disposition of the securities or instruments; and the evaluation of forces which influence the market in which the securities or instruments are purchased and sold. Foreign currency exchange rates are generally determined as of the close of the New York Stock Exchange ("NYSE").

Certain securities in which the Funds invest are traded in markets that close before 4:00 p.m. Eastern Time. Normally, developments that occur between the close of the foreign markets and 4:00 p.m. Eastern Time will not be reflected in the Fund's net asset value. However, if any of the Funds determine that such developments are so significant that they will materially affect the value of the Fund's securities, the Fund may adjust the previous closing prices to reflect what the Board believes to be the fair value of these securities as of 4:00 p.m. Eastern Time.

Certain Funds may use a systematic fair valuation model provided by an independent third party to value securities principally traded in foreign markets in order to adjust for possible stale pricing that may occur between the close of the foreign exchanges and the time for valuation. If a security is valued at a "fair value," that value is likely to be different from the last quoted market price for the security.

The amortized cost method of valuation, which approximates market value, generally is used to value short-term debt instruments with sixty days or less remaining to maturity, unless the Board determines that this does not represent fair value. Investments in open-end investment companies are valued at the daily closing net asset value of the respective investment company. All investments quoted in foreign currencies will be valued daily in US dollars on the basis of the foreign currency exchange rates prevailing at the time such valuation is determined by the Funds' custodian.

Futures contracts are generally valued at the settlement price established each day on the exchange on which they are traded. Forward foreign currency contracts are valued daily using forward exchange rates quoted by independent pricing services.

Swaps are marked-to-market daily based upon values from third party vendors or quotations from market makers to the extent available and the change in value, if any, is recorded as an unrealized gain or loss on the Statement of assets and liabilities. In the event that market quotations are not readily available or

75

The UBS Funds

Notes to financial statements

deemed unreliable, the swap is valued at fair value as determined in good faith by or under the direction of the Board.

GAAP requires disclosure regarding the various inputs that are used in determining the value of the Funds' investments. These inputs are summarized into the three broad levels listed below:

Level 1—Unadjusted quoted prices in active markets for identical investments.

Level 2—Other significant observable inputs, including but not limited to, quoted prices for similar investments, interest rates, prepayment speeds and credit risk.

Level 3—Unobservable inputs inclusive of the Fund's own assumptions in determining the fair value of investments.

A fair value hierarchy has been included near the end of each Fund's Portfolio of investments.

In January 2010, FASB issued Accounting Standards Update ("ASU") No. 2010-06 "Improving Disclosures about Fair Value Measurements". ASU No. 2010-06 will require reporting entities to make new disclosures about amounts and reasons for significant transfers in and out of Level 1 and Level 2 fair value measurements as well as inputs and valuation techniques used to measure fair value for both recurring and nonrecurring fair value measurements that fall in either Level 2 or Level 3, and information on purchases, sales, issuances and settlements on a gross basis in the reconciliation of activity in Level 3 fair value measurements. The new and revised disclosures are required to be implemented for fiscal years beginning after December 15, 2009 except for the disclosures surrounding purchases, sales, issuances and settlements on a gross basis in the reconciliation of Level 3 fair value measurements, which are effective for fiscal years beginning after December 15, 2010. Management is currently evaluating the impact the adoption of ASU No. 2010-06 may have on the Fund's financial statement disclosures.

In March 2008, the FASB amended Accounting Standards Codification Topic 815 Derivatives and Hedging ("ASC 815"), which changed the disclosure requirements for derivatives and hedging activities. Since investment companies value their derivatives at fair value and recognize changes in fair value through the statement of operations, they do not qualify for hedge accounting under ASC 815. Accordingly, even though a fund's investments in derivatives may represent economic hedges, they are considered to be non-hedge transactions for purposes of disclosure under ASC 815. ASC 815 requires (1) objectives for using derivative instruments be disclosed in terms of underlying risk and accounting designation, (2) the fair values of derivative instruments and their gains and losses be disclosed in a tabular format, and (3) information be disclosed about credit-risk contingent features of derivatives contracts. ASC 815 is effective for financi al statements for fiscal years and interim periods beginning after November 15, 2008. Details of this disclosure can be found below as well as in the Portfolio of investments. The volume of derivatives that is presented in the Portfolio of investments of each Fund is consistent with the derivative activity during the period ended December 31, 2009. The Advisor is not aware of any credit-risk contingent features on derivatives contracts held by the Funds.

At December 31, 2009, each Fund had the following derivatives:

	Asset derivatives
		Interest rate risk		Foreign exchange risk		Credit risk		Total
UBS Absolute Return	Forward contacts1	$	—	$	3,615,764	$	—	$	3,615,764
Bond Fund	Futures contracts2		2,261,404		—		—		2,261,404
	Swap agreements1		—		—		72,473		72,473
	Total value	$	2,261,404	$	3,615,764	$	72,473	$	5,949,641

¹  Statement of assets and liabilities location: Outstanding swap agreements, at value and unrealized appreciation on forward foreign currency contracts.

²  Includes cumulative appreciation/(depreciation) of futures contracts as reported on the futures contracts table in the Portfolio of investments, but only the unpaid variation margin is reported within the Statement of assets and liabilities.

76

The UBS Funds

Notes to financial statements

	Liability derivatives
		Interest rate risk			Foreign exchange risk			Credit risk			Total
UBS Absolute Return	Forward contacts1	$	—		$	(1,052,447	)	$	—		$	(1,052,447	)
Bond Fund	Futures contracts2		(200,609	)		—			—			(200,609	)
	Swap agreements1		—			—			(416,744	)		(416,744	)
	Total value	$	(200,609	)	$	(1,052,447	)	$	(416,744	)	$	(1,669,800	)

¹  Statement of assets and liabilities location: Outstanding swap agreements, at value and unrealized depreciation on forward foreign currency contracts.

²  Includes cumulative appreciation/(depreciation) of futures contracts as reported on the futures contracts table in the Portfolio of investments, but only the unpaid variation margin is reported within the Statement of assets and liabilities.

Activities in derivative instruments during the period ended December 31, 2009, were as follows:

		Interest rate risk			Credit risk			Foreign exchange risk			Total
UBS Absolute Return	Net realized loss1
Bond Fund	Forward contacts	$	—		$	—		$	(6,982,742	)	$	(6,982,742	)
	Futures contracts		(4,206,832	)		—			—			(4,206,832	)
	Swap agreements		—			(123,178	)		—			(123,178	)
	Total net realized loss	$	(4,206,832	)	$	(123,178	)	$	(6,982,742	)	$	(11,312,752	)
	Change in unrealized appreciation/(depreciation)2
	Forward contacts	$	—		$	—		$	6,814,502		$	6,814,502
	Futures contracts		1,865,646			—			—			1,865,646
	Swap agreements		—			(115,344	)		—			(115,344	)
	Total change in unrealized appreciation/(depreciation)	$	1,865,646		$	(115,344	)	$	6,814,502		$	8,564,804

¹  Statement of operations location: Net realized gain/(loss) from futures contracts, swap agreements, and foreign currency transactions.

²  Statement of operations location: Net change in unrealized appreciation/(depreciation) on futures contracts, swap agreements, and forward foreign currency contracts.

	Asset derivatives
		Interest rate risk		Equity risk		Foreign exchange risk		Total
UBS Global Bond	Forward contacts1	$	—	$	—	$	205,892	$	205,892
Fund	Futures contracts2		36,224		—		—		36,224
	Swap agreements1		—		3,109		—		3,109
	Total value	$	36,224	$	3,109	$	205,892	$	245,225

¹  Statement of assets and liabilities location: Outstanding swap agreements, at value and unrealized appreciation on forward foreign currency contracts.

²  Includes cumulative appreciation/(depreciation) of futures contracts as reported on the futures contracts table in the Portfolio of investments, but only the unpaid variation margin is reported within the Statement of assets and liabilities.

	Liability derivatives
		Interest rate risk			Equity risk			Foreign exchange risk			Total
UBS Global Bond	Forward contacts1	$	—		$	—		$	(104,406	)	$	(104,406	)
Fund	Futures contracts2		(38,620	)		—			—			(38,620	)
	Swap agreements1		—			(65,554	)		—			(65,554	)
	Total value	$	(38,620	)	$	(65,554	)	$	(104,406	)	$	(208,580	)

¹  Statement of assets and liabilities location: Swap agreements, at value and unrealized depreciation on forward foreign currency contracts.

²  Includes cumulative appreciation/(depreciation) of futures contracts as reported on the futures contracts table in the Portfolio of investments, but only the unpaid variation margin is reported within the Statement of assets and liabilities.

77

The UBS Funds

Notes to financial statements

Activities in derivative instruments during the period ended December 31, 2009, were as follows:

		Interest rate risk			Credit risk			Foreign exchange risk		Total
UBS Global Bond	Net realized gain1
Fund	Forward contacts	$	—		$	—		$	152,112	$	152,112
	Futures contracts		13,168			—			—		13,168
	Swap agreements		—			289			—		289
	Total net realized gain	$	13,168		$	289		$	152,112	$	165,569
	Change in unrealized appreciation/(depreciation)2
UBS Global Bond	Forward contacts	$	—		$	—		$	154,508	$	154,508
Fund	Futures contracts		(2,396	)		—			—		(2,396	)
	Swap agreements		—			(28,567	)		—		(28,567	)
	Total change in unrealized appreciation/(depreciation)	$	(2,396	)	$	(28,567	)	$	154,508	$	123,545

¹  Statement of operations location: Net realized gain/(loss) from futures contracts, swap agreements, and foreign currency transactions.

²  Statement of operations location: Net change in unrealized appreciation/(depreciation) on futures contracts, swap agreements, and forward foreign currency contracts.

	Asset derivatives
		Interest rate risk		Total
UBS U.S. Bond Fund	Futures contracts2	$	299,100	$	299,100
	Swap agreements1		59,936		59,936
	Total value	$	359,036	$	359,036

¹  Statement of assets and liabilities location: Swap agreements, at value.

²  Includes cumulative appreciation/(depreciation) of futures contracts as reported on the futures contracts table in the Portfolio of investments, but only the unpaid variation margin is reported within the Statement of assets and liabilities.

	Liability derivatives
		Interest rate risk			Total
UBS U.S. Bond Fund	Futures contracts2	$	(256,761	)	$	(256,761	)
	Swap agreements1		(401,377	)		(401,377	)
	Total value	$	(658,138	)	$	(658,138	)

¹  Statement of assets and liabilities location: Swap agreements, at value.

²  Includes cumulative appreciation/(depreciation) of futures contracts as reported on the futures contracts table in the Portfolio of investments, but only the unpaid variation margin is reported within the Statement of assets and liabilities.

Activities in derivative instruments during the period ended December 31, 2009, were as follows:

		Interest rate risk			Total
UBS U.S. Bond Fund	Net realized gain/(loss)1
	Futures contracts	$	(107,025	)	$	(107,025	)
	Swap agreements		627,870			627,870
	Total net realized gain	$	520,845		$	520,845
	Change in unrealized appreciation/(depreciation)2
UBS U.S. Bond Fund	Futures contracts	$	26,838		$	26,838
	Swap agreements		(167,609	)		(167,609	)
	Total change in unrealized appreciation/(depreciation)	$	(140,771	)	$	(140,771	)

¹  Statement of operations location: Net realized gain/(loss) from futures contracts, and swap agreements.

²  Statement of operations location: Net change in unrealized appreciation/(depreciation) of futures contracts and swap agreements.

78

The UBS Funds

Notes to financial statements

B. Restricted securities: The Funds may invest in securities that are subject to legal or contractual restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are registered. Disposal of these securities may involve time consuming negotiations and expense, and prompt sale at an acceptable price may be difficult. Information regarding restricted securities, if any, is included in each Fund's Notes to Portfolio of investments.

C. Foreign currency translation: The Funds use the foreign currency exchange rates determined as of the close of regular trading on the NYSE. For purposes of calculating the US dollar equivalent value of a non-US dollar denominated obligation, foreign currency amounts are translated into US dollars on the following basis: (1) market value of investment securities and other assets and liabilities—at the exchange rates prevailing at the end of each Fund's fiscal period; and (2) purchases and sales of investment securities and income and expenses—at the rates of exchange prevailing on the respective dates of such transactions.

Although the net assets and the market value of each Fund's portfolio are presented at the foreign exchange rates at the end of each Fund's fiscal period, the Funds do not generally isolate the effect of fluctuations in foreign exchange rates from the effect of the changes in market prices of securities. Certain foreign exchange gains and losses included in realized and unrealized gains and losses are included in or are a reduction of ordinary income in accordance with US federal income tax regulations.

D. Investment transactions, investment income and expenses: Investment transactions are recorded on the trade date. Realized gains and losses from investment and foreign exchange transactions are calculated using the identified cost method. Dividend income and expense are recorded on the ex-dividend date ("ex-date") except in the case of certain dividends from foreign securities which are recorded as soon after the ex-date as the respective Fund, using reasonable diligence, becomes aware of such dividends. Interest income is recorded on an accrual basis. Discounts are accreted and premiums are amortized as adjustments to interest income and the identified cost of investments.

Income, expenses (excluding class-specific expenses) and realized/unrealized gains/losses are allocated proportionately to each class of shares based upon the relative net asset value of outstanding shares (or the value of dividend-eligible shares, as appropriate) of each class at the beginning of the day after adjusting for current capital share activity of the respective classes. Class specific expenses are charged directly to the applicable class of shares.

E. Forward foreign currency contracts: A forward foreign currency contract is a commitment to purchase or sell a foreign currency at a future date at a negotiated forward rate. Risks associated with such contracts include movement in the value of the foreign currency relative to the US dollar and the potential inability of the counterparty to meet the terms of the contract. The Funds may purchase or sell currencies and/or engage in forward foreign currency transactions in order to expedite settlement of portfolio transactions and to manage currency risk. Forward foreign currency contracts involve, to varying degrees, elements of market risk (specifically foreign currency risk).

A Fund will only enter into forward contracts to sell, for a fixed amount of US dollars or other appropriate currency, an amount of foreign currency, to the extent that the value of the short forward contract is covered by the underlying value of securities denominated in the currency being sold. Alternatively, when a Fund enters into a forward contract to sell an amount of foreign currency, the Fund's custodian or sub custodian will place assets in a segregated account of the Fund in an amount not less than the value of the Fund's total assets committed to the consumption of such forward contracts. If the assets placed in the account decline in value, additional cash or securities will be placed in the account on a daily basis so that the value of the account will equal the amount of the Fund's commitments with respect to such contracts.

79

The UBS Funds

Notes to financial statements

The unrealized gain, if any, represents the credit risk to each Fund on a forward foreign currency contract. Fluctuations in the value of the open forward foreign currency contracts are recorded daily for book purposes as net unrealized gains or losses on foreign forward currency contracts by the Funds. Realized gains and losses include net gains and losses recognized by the Funds on contracts which have been sold or matured.

F. Futures contracts: Each Fund may purchase or sell financial futures contracts. The Funds may purchase or sell futures contracts to increase or reduce their exposure to an asset class without purchasing or selling the underlying securities, either as a hedge or to enhance or realize gains. Using financial futures contracts involves various market risks, including interest rate risk. Risks of entering into futures contracts include the possibility that there may be an illiquid market or that a change in the value of the contract may not correlate with changes in the value of the underlying securities.

Upon entering into a futures contract, the Fund is required to deliver to a broker an amount of cash and/or securities equal to a certain percentage of the contract amount. This amount is known as the "initial margin". Subsequent payments, known as "variation margin", are made or received by the Fund each day, depending on the daily fluctuations in the value of the underlying futures contracts. Such variation margin is recorded for financial statement purposes on a daily basis as an unrealized gain or loss on futures until the futures contract is closed or expires, at which time the net gain or loss is reclassified to realized gain or loss on futures.

G. Securities traded on to-be-announced basis: Certain Funds may from time to time purchase, or sell short, securities on a to-be-announced ("TBA") basis. In a TBA transaction, the Fund commits to purchasing or selling securities for which all specific information is not yet known at the time of the trade, particularly the face amount and maturity date of the underlying security transactions. Securities purchased on a TBA basis are not settled until they are delivered to the Fund, normally 15 to 45 days later. Beginning on the date the Fund enters into a TBA transaction, cash, US government securities or other liquid high grade debt obligations are segregated in an amount equal in value to the purchase price of the TBA security. These transactions are subject to market fluctuations and their current value is determined in the same manner as for other securities.

H. Swap agreements: Certain Funds may engage in swap agreements, including but not limited to interest rate, currency, total return, and credit default swap agreements. The Funds expect to enter into these transactions to preserve a return or spread on a particular investment or to hedge a portion of the portfolio's duration, to protect against any increase in the price of securities a Fund anticipates purchasing at a later date, or to gain exposure to certain markets in the most economical way possible.

Certain Funds may enter into interest rate swap agreements with another party to receive or pay interest (e.g., an exchange of fixed rate payments for floating rate payments) to protect itself from interest rate fluctuations. This type of swap is an agreement that obligates two parties to exchange a series of cash flows at specified intervals based upon or calculated by reference to a specified interest rate(s) for a specified amount. The payment flows are usually netted against each other, with the difference being paid by one party to the other.

Credit default swap agreements involve commitments to make or receive payments in the event of a default or other credit event of a referenced security. As a buyer, a Fund would make periodic payments to the counterparty, and a Fund would receive payments only upon the occurrence of a credit event. If no credit event occurs, a Fund will lose its periodic stream of payments over the term of the contract. However, if a credit event does occur, a Fund typically would receive full notional value for a reference obligation that may have little or no value. As a seller, a Fund would receive periodic payments from the counterparty, and a Fund

80

The UBS Funds

Notes to financial statements

would make payments only upon the occurrence of a credit event. If no credit event occurs, a Fund will gain the periodic stream of payments it received over the term of the contract. However, if a credit event occurs, a Fund will pay full notional value for a reference obligation that may have little or no value. Credit default swaps may involve greater risks than if a Fund had invested in the reference obligation directly and are subject to general market risk, liquidity risk, counterparty risk and credit risk.

Credit default swap agreements on corporate issues or sovereign issues of an emerging market country involve one party making a stream of payments to another party in exchange for the right to receive a specified return in the event of a default or other credit event. If a credit event occurs and cash settlement is not elected, a variety of other deliverable obligations may be delivered in lieu of the specific referenced obligation. The ability to deliver other obligations may result in a cheapest-to-deliver option (the buyer of protection's right to choose the deliverable obligation with the lowest value following a credit event). A Fund may use credit default swaps on corporate issues or sovereign issues of an emerging market country to provide a measure of protection against defaults of the issuers (i.e., to reduce risk where a Fund owns or has exposure to the referenced obligation) or to take an active long or short position with respect to the likelihood of a particular issuer's default.

The maximum potential amount of future payments (undiscounted) that a Fund as a seller of protection could be required to make under a credit default swap agreement would be an amount equal to the notional amount of the agreement. Notional amounts of all credit default swap agreements outstanding as of December 31, 2009 for which a Fund is the seller of protection are disclosed under the section "Credit default swaps on corporate and sovereign issues—sell protection" in the Notes to Portfolio of investments. These potential amounts would be partially offset by any recovery values of the respective referenced obligations, upfront payments received upon entering into the agreement, or net amounts received from the settlement of buy protection credit default swap agreements entered into, if any, by a Fund for the same referenced entity or entities.

Total return swap agreements involve commitments to pay or receive interest in exchange for a market-linked return based on a notional amount. To the extent the total return of the security or index underlying the transaction exceeds or falls short of the offsetting interest rate obligation, a Fund will receive a payment from or make a payment to the counterparty, respectively. Total return swaps are marked-to-market daily, and the change, if any, is recorded as unrealized appreciation or depreciation.

The use of swaps involves investment techniques and risks different from those associated with ordinary portfolio security transactions. If UBS Global AM is incorrect in its forecast of market values, interest rates and other applicable factors, the investment performance of a Fund will be less favorable than it would have been if this investment technique was never used. Swaps do not involve the delivery of securities and are subject to counterparty risk. If the other party to a swap defaults and fails to consummate the transaction, a Fund's risk of loss will consist of the net amount of interest or other payments that the Fund is contractually entitled to receive. Therefore, a Fund would consider the creditworthiness of the counterparty to a swap agreement in evaluating potential credit risk.

A Fund accrues for interim payments on swap agreements on a daily basis, with the net amount recorded within unrealized appreciation/depreciation of swap agreements on the Statement of assets and liabilities. Once interim payments are settled in cash, the net amount is recorded as realized gain/loss on swap agreements, in addition to realized gain/loss recorded upon the termination of swap agreements on the Statement of operations. Fluctuations in the value of swap agreements are recorded for financial statement purposes as unrealized appreciation or depreciation of swap agreements.

81

The UBS Funds

Notes to financial statements

I. Option writing: Certain Funds may write (sell) put and call options on foreign or US securities indices in order to gain exposure to or protect against changes in the markets. When a Fund writes a call or a put option, an amount equal to the premium received by the Fund is included in the Fund's Statement of assets and liabilities as an asset and as an equivalent liability. The amount of the liability is subsequently marked-to-market to reflect the current market value of the option written. If an option which the Fund has written either expires on its stipulated expiration date or the Fund enters into a closing purchase transaction, the Fund realizes a gain (or loss if the cost of a closing purchase transaction exceeds the premium received when the option was written) without regard to any unrealized gain or loss on the underlying security or deri vative instrument, and the liability related to such option is extinguished. If a call option which the Fund has written is exercised, the Fund recognizes a realized gain or loss (long-term or short-term, depending on the holding period of the underlying security) from the sale of the underlying security or derivative instrument and the proceeds from the sale are increased by the premium originally received. If a put option which a Fund has written is exercised, the amount of the premium originally received reduces the cost of the security or derivative instrument which the Fund purchases upon exercise of the option.

In writing an option, the Fund bears the market risk of an unfavorable change in the price of the derivative instrument, security, index or currency underlying the written option. Exercise of an option written by the Fund could result in the Fund selling or buying a derivative instrument, security or currency at a price different from current market value.

J. Purchased options: Certain Funds may purchase put and call options on foreign or US securities and indices as well as exchange-listed call options on particular market segment indices to achieve temporary exposure to a specific security, industry or geographic region. Purchasing call options tends to increase exposure to the underlying instrument. Purchasing put options tends to decrease exposure to the underlying instrument. The Fund pays a premium which is included in the Statement of assets and liabilities as an investment and subsequently marked-to-market to reflect the current value of the option. Premiums paid for purchasing options which expire are treated as realized losses. The risk associated with purchasing put and call options is limited to the premium paid. Premiums paid for purchasing options which are exercised or closed are added to the amounts paid or offset against the proceeds on the underlying futures, security or currency transaction to determine the realized gain or loss.

K. Short sales: UBS Absolute Return Bond Fund and UBS High Yield Fund may enter into short sales whereby they sell a security they generally do not own, in anticipation of a decline in the security's price. The initial amount of a short sale is recorded as a liability which is marked-to-market daily. Fluctuations in the value of this liability are recorded as unrealized gains or losses on the Statement of operations. If a Fund shorts a security when also holding a long position in the security (a "short against the box"), as the security price declines, the short position increases in value, offsetting the long position's decrease in value. The opposite effect occurs if the security price rises. A Fund will realize a gain or loss upon closing of the short sale (returning the security to the counterparty by way of purchase or delivery of a long positio n owned). The Fund is liable to the buyer for any dividends payable on securities while those securities are in a short position. These dividends are booked as an expense of the Funds. The Fund designates collateral consisting of cash, US government securities or other liquid assets sufficient to collateralize the market value of short positions. The Fund is charged a securities loan fee in connection with short sale transactions.

For the period ended December 31, 2009, there were no short positions held by either of these Funds.

82

The UBS Funds

Notes to financial statements

L. Dividends and distributions: It is the Funds' policy to distribute their respective net investment income, if any, monthly, except for UBS Absolute Return Bond Fund which will distribute its net investment income, if any, quarterly. Each Fund declares and distributes net realized gains, if any, on an annual basis, typically in December. Dividends and distributions to shareholders are recorded on the ex-dividend date. The amount of dividends from net investment income and distributions from net realized capital gains and/or return of capital is determined in accordance with US federal income tax regulations, which may differ from US generally accepted accounting principles. These "book/tax" differences are either considered temporary or permanent in nature. To the extent these differences are permanent in nature, such amounts are reclassified within the capital accounts based on their federal tax-basis treatment; temporary differences do not require reclassification.

M. Concentration of risk: Investing in securities of foreign issuers and currency transactions may involve certain considerations and risks not typically associated with investments in the United States. These risks include revaluation of currencies, adverse fluctuations in foreign currency values and possible adverse political, social and economic developments, including those particular to a specific industry, country or region, which could cause the securities and their markets to be less liquid and prices more volatile than those of comparable US companies and US government securities. These risks are greater with respect to securities of issuers located in emerging market countries in which the Funds invest. The ability of the issuers of debt securities held by a Fund to meet their obligations may be affected by economic and political development s particular to a specific industry, country, state or region.

N. Redemption fees: Each class of each series of The UBS Funds will impose a 1% redemption fee on shares sold or exchanged within 90 days of their purchase date, subject to limited exceptions. This amount is paid to the applicable Fund, not the Advisor or UBS Global AM (US). The redemption fees earned by the Funds are disclosed in the Statement of changes in net assets. For the period ended December 31, 2009, redemption fees per Fund represent less than $0.005 per share.

2. Investment advisory fees and other transactions with affiliates

UBS Global Asset Management (Americas) Inc. (the "Advisor"), a registered investment advisor, provides the Funds with investment management services. As compensation for these services, each Fund pays the Advisor a monthly fee, accrued daily and paid monthly, based on each Fund's respective average daily net assets in accordance with the following per annum schedule:

Fund	$0 to $500 mm			$500 mm to $1.0 billion			$1.0 billion to $1.5 billion			$1.5 billion to $2.0 billion			$2.0 billion to $3.0 billion			$3.0 billion to $6.0 billion			$6.0 billion and over
UBS Absolute Return Bond Fund		0.550	%		0.500	%		0.475	%		0.450	%		0.425	%		0.425	%		0.425	%
UBS Global Bond Fund		0.650			0.650			0.650			0.600			0.550			0.550			0.550
UBS High Yield Fund		0.600			0.550			0.525			0.525			0.525			0.525			0.525
UBS U.S. Bond Fund		0.500			0.475			0.450			0.425			0.400			0.400			0.400

The Advisor has agreed to waive its fees and/or reimburse the expenses (excluding expenses incurred through investment in other investment companies and interest expense) of each Fund to the extent that total annualized operating expenses (excluding expenses incurred through investment in other investment companies and interest expense) exceed a specified percentage of each Fund's respective average daily net

83

The UBS Funds

Notes to financial statements

assets. Investment advisory fees, including the dollar amount waived or reimbursed for the period ended December 31, 2009, were as follows:

Fund	Class A expense cap			Class B expense cap		Class C expense cap			Class Y expense cap			Advisory fees		Fees waived/ expenses reimbursed
UBS Absolute Return Bond Fund		1.00	%		N/A%*		1.35	%		0.85	%	$	427,669	$	18,823
UBS Global Bond Fund		1.15			1.90		1.65			0.90			103,633		134,752
UBS High Yield Fund		1.20			1.95		1.70			0.95			274,471		83,214
UBS U.S. Bond Fund		0.64			1.39		1.14			0.39			158,948		232,167

*  UBS Absolute Return Bond Fund does not offer Class B shares.

Each Fund will reimburse the Advisor for expenses it reimburses for a period of three years following such expense reimbursements, provided that the reimbursement by a Fund of the Advisor will not cause the total operating expense ratio to exceed the contractual limit as then may be in effect for the Fund. The expenses waived for the period ended December 31, 2009 are subject to repayment through June 30, 2013.

At December 31, 2009, the following Funds had remaining fee waivers and expense reimbursements subject to repayment to the Advisor and respective dates of expiration as follows:

Fund	Fee waivers/ expense reimbursements subject to repayment		Expires June 30, 2010		Expires June 30, 2011		Expires June 30, 2012		Expires June 30, 2013
UBS Absolute Return Bond Fund—Class A	$	51,183	$	—	$	—	$	35,057	$	16,126
UBS Absolute Return Bond Fund—Class C		7,430		—		—		4,733		2,697
UBS Absolute Return Bond Fund—Class Y		—		—		—		—		—
UBS Global Bond Fund—Class A		142,815		38,861		20,765		50,263		32,926
UBS Global Bond Fund—Class B		2,779		984		460		761		574
UBS Global Bond Fund—Class C		20,422		2,040		2,242		8,446		7,694
UBS Global Bond Fund—Class Y		563,967		117,753		135,610		217,046		93,558
UBS High Yield Fund—Class A		155,327		42,127		35,260		46,068		31,872
UBS High Yield Fund—Class B		7,533		2,009		2,204		2,019		1,301
UBS High Yield Fund—Class C		36,218		9,583		8,511		10,727		7,397
UBS High Yield Fund—Class Y		155,835		11,051		26,868		75,272		42,644
UBS U.S. Bond Fund—Class A		167,383		70,199		27,421		34,710		35,053
UBS U.S. Bond Fund—Class B		3,960		1,615		1,126		738		481
UBS U.S. Bond Fund—Class C		22,087		3,139		3,008		6,551		9,389
UBS U.S. Bond Fund—Class Y		963,895		222,685		278,613		275,353		187,244

84

The UBS Funds

Notes to financial statements

Each Fund pays UBS Global Asset Management (US) Inc. ("UBS Global AM (US)"), an affiliate of the Advisor, a monthly administration fee that is accrued daily and paid monthly at an annual rate of 0.075% of the average daily net assets of such Fund. For the period ended December 31, 2009, the Funds owed and incurred administrative fees as follows:

Fund	Adminstrative fees owed		Adminstrative fees incurred
UBS Absolute Return Bond Fund	$	9,785	$	58,454
UBS Global Bond Fund		1,751		11,959
UBS High Yield Fund		5,662		34,329
UBS U.S. Bond Fund		3,590		23,843

The Funds may invest in certain affiliated investment companies also advised or managed by the Advisor. The Funds pay no management fees to these affiliated investment companies. Investments in affiliated investment companies for the period ended December 31, 2009 were as follows:

  UBS U.S. Bond Fund

Affiliated investment companies	Value 06/30/09		Purchases		Sales proceeds		Net realized gain		Change in net unrealized appreciation (depreciation)			Value 12/31/09		% of net assets
UBS Corporate Bond Relationship Fund	$	12,088,071	$	500,000	$	9,775,000	$	1,326,464	$	(374,107	)	$	3,765,428		7.47	%
UBS Opportunistic Emerging Markets Debt Relationship Fund		—		1,200,000		—		—		18,781			1,218,781		2.42
UBS High Yield Relationship Fund		1,194,089		—		1,192,724		167,450		(168,815	)		—		—
UBS U.S. Treasury Inflation Protected Securities Relationship Fund		979,715		—		1,015,879		82,993		(46,829	)		—		—
	$	14,261,875	$	1,700,000	$	11,983,603	$	1,576,907	$	(570,970	)	$	4,984,209		9.89	%

The Funds may invest in UBS Cash Management Prime Relationship Fund ("Cash Prime"). Cash Prime is offered as a cash management option only to mutual funds and certain other accounts. Distributions received from Cash Prime are reflected as affiliated interest income in the Statement of operations. Amounts relating to those investments at December 31, 2009 were as follows:

Fund	Value 6/30/09		Purchases		Sales proceeds		Value 12/31/09		% of net assets			Income earned
UBS Absolute Return Bond Fund	$	4,120,804	$	17,625,006	$	16,036,313	$	5,709,497		3.7	%	$	4,825
UBS Global Bond Fund		545,874		11,220,233		11,766,107		—		0.0			1,229
UBS High Yield Fund		6,815,672		20,022,046		26,819,778		17,940		0.0	*		1,341
UBS U.S. Bond Fund		2,885,206		36,217,230		39,004,004		98,432		0.2			2,974

*  Amount represents less than 0.05%.

Under normal conditions, the Funds invest cash collateral from securities lending activities into an affiliated private money market fund, UBS Private Money Market Fund, LLC ("Private Money Market"), which operates in compliance with Rule2a-7 of the Act. Private Money Market is managed by the Advisor and is offered

85

The UBS Funds

Notes to financial statements

only to mutual funds and certain other accounts managed by the Advisor. The Advisor acts as Managing Member and receives a management fee from Private Money Market payable monthly in arrears at the annual rate of 0.10% of Private Money Market's average daily members' equity, minus the aggregate operating expenses of, and incurred by, Private Money Market during each such related month, not including investment expenses (including brokerage commissions, taxes, interest charges and other costs with respect to transactions in securities) and extraordinary expenses including litigation expenses, if any. The Advisor may, in its sole discretion, waive all or any portion of the management fee to which it may be entitled from time to time in order to maintain operating expenses at a certain level. Distributions received from Private Money Market are reflected as securities lending-net in the Statement of operations. Amounts relating to those investments at December 31, 2009 and for the period then ended were as follows:

Fund	Value 6/30/09		Purchases		Sales proceeds		Value 12/31/09		% of net assets			Income earned
UBS U.S. Bond Fund	$	1,292,045	$	8,335,671	$	9,142,907	$	484,809		0.97	%	$	2,610

3. Service and distribution plans

UBS Global AM (US) is the principal underwriter of each Fund's shares. The Trust has adopted service and/or distribution plans (the "Plans") pursuant to Rule 12b-1 under the 1940 Act for Class A, Class B and Class C. The Plans govern payments made for the expenses incurred in the service and/or distribution of Class A, Class B and Class C. Annual fees under the Plans as a percentage of the average daily net assets of each representative class of each of the Funds are as follows:

Fund	Class A			Class B		Class C
UBS Absolute Return Bond Fund		0.15	%		N/A%*		0.50	%
UBS Global Bond Fund		0.25			1.00		0.75
UBS High Yield Fund		0.25			1.00		0.75
UBS U.S. Bond Fund		0.25			1.00		0.75

*  UBS Absolute Return Bond Fund does not offer Class B shares.

UBS Global AM (US) also receives the proceeds of the initial sales charges paid upon purchases of Class A shares and the contingent deferred sales charges paid by shareholders upon certain redemptions of Class A, Class B, and Class C. At December 31, 2009, certain Funds owed UBS Global AM (US) service and distribution fees, and for the period ended December 31, 2009, certain Funds were informed by UBS Global AM (US) that it had earned sales charges as follows:

Fund	Service and distribution fees owed		Sales charges earned
UBS Absolute Return Bond Fund—Class A	$	1,904	$	1,159
UBS Absolute Return Bond Fund—Class C		1,797		—
UBS Global Bond Fund—Class A		1,796		3,640
UBS Global Bond Fund—Class B		128		70
UBS Global Bond Fund—Class C		1,409		11

86

The UBS Funds

Notes to financial statements

Fund	Service and distribution fees owed		Sales charges earned
UBS High Yield Fund—Class A	$	7,717	$	34,427
UBS High Yield Fund—Class B		813		1,858
UBS High Yield Fund—Class C		5,373		—
UBS U.S. Bond Fund—Class A		1,893		5,276
UBS U.S. Bond Fund—Class B		92		—
UBS U.S. Bond Fund—Class C		1,680		—

4. Transfer agency and related services fees

UBS Financial Services Inc. provides certain sub-transfer agency and administration services to each Fund pursuant to a delegation of authority from PNC Global Investment Servicing ("PNC"), each Fund's transfer agent, and is compensated for these services by PNC, not the Funds.

For the period ended December 31, 2009, UBS Financial Services Inc. received from PNC, not the Funds, total services fees as follows:

Fund	Amount paid
UBS Absolute Return Bond Fund	$	8,916
UBS Global Bond Fund		3,392
UBS High Yield Fund		14,090
UBS U.S. Bond Fund		1,712

5. Securities lending

Each Fund may lend securities up to 33 1/3% of its total assets to qualified broker-dealers or institutional investors. The loans are secured at all times by cash, cash equivalents or US government securities in an amount at least equal to the market value of the securities loaned, plus accrued interest and dividends, determined on a daily basis and adjusted accordingly.

Each Fund will regain ownership of loaned securities to exercise certain beneficial rights; however, the Fund may bear the risk of delay in recovery of, or even loss of rights in, the securities loaned should the borrower fail financially. The Fund receives compensation for lending its securities from interest or dividends earned on the cash, cash equivalents or US government securities held as collateral, net of fee rebates paid to the borrower plus reasonable administrative and custody fees.

UBS U.S. Bond Fund loaned securities to certain qualified broker-dealers, with the Funds' custodian acting as the Funds' lending agent. Cash collateral received is invested in an investment company, which is included in the Portfolio(s) of investments. In addition, UBS U.S. Bond Fund received US Government Agency securities as collateral with a market value of $687,602, which cannot be resold. The market value of loaned securities and related collateral outstanding at December 31, 2009, were as follows:

Fund	Market value of securities loaned		Market value of collateral received from securities loaned		Market value of investments of cash collateral received
UBS U.S. Bond Fund	$	1,148,373	$	1,172,411	$	484,809

87

The UBS Funds

Notes to financial statements

6. Purchases and sales of securities

For the period ended December 31, 2009, aggregate purchases and sales of portfolio securities, excluding short-term investments and US Government and agency securities, were as follows:

Fund	Purchases		Sales proceeds
UBS Absolute Return Bond Fund	$	21,871,585	$	33,839,487
UBS Global Bond Fund		8,467,676		18,647,181
UBS High Yield Fund		28,060,237		56,000,776
UBS U.S. Bond Fund		37,225,153		53,078,895

For the period ended December 31, 2009, aggregate purchases and sales of US Government and agency securities, excluding short-term investments, were as follows:

Fund	Purchases		Sales proceeds
UBS Global Bond Fund	$	1,593,785	$	2,664,670
UBS U.S. Bond Fund		59,979,049		60,489,938

7. Federal income taxes

It is each Fund's policy to comply with all requirements of the Internal Revenue Code (the "Code") applicable to regulated investment companies and to distribute substantially all of their taxable income to their shareholders. In addition, by distributing during each calendar year substantially all of its net investment income, net realized capital gains and certain other amounts, if any, each Fund intends not to be subject to a federal excise tax. Accordingly, no federal income tax provision was required.

The tax character of distributions paid during the fiscal year ended June 30, 2009 were as follows:

	2009
Fund	Distributions paid from ordinary income		Distributions paid from net long-term capital gains		Total distributions paid
UBS Absolute Return Bond Fund	$	16,986,729		—	$	16,986,729
UBS Global Bond Fund		7,943,946		—		7,943,946
UBS High Yield Fund		11,611,887		—		11,611,887
UBS U.S. Bond Fund		6,524,063		—		6,524,063

The tax character of distributions paid and components of net assets for the current fiscal year will be determined after the Trust's fiscal year ending June 30, 2010.

88

The UBS Funds

Notes to financial statements

At June 30, 2009, the following Funds had net capital loss carryforwards for federal income tax purposes available to offset future capital gains through the indicated expiration dates:

	Expiration dates—December 31,
Fund	June 30, 2010		June 30, 2011		June 30, 2012		June 30, 2013		June 30, 2014		June 30, 2015		June 30, 2016		June 30, 2017
UBS Absolute Return Bond Fund	$	—	$	—	$	—	$	—	$	—	$	564,587	$	8,900,102	$	70,926,250
UBS Global Bond Fund		—		—		—		—		—		359,497		577,591		3,369,482
UBS High Yield Fund		6,612,767		37,425,637		15,791,570		11,067,780		22,213,870		5,885,761		1,000,707		4,782,241
UBS U.S. Bond Fund		—		—		—		—		353,828		1,283,441		—		3,069,977

The UBS Global Bond Fund and UBS High Yield Fund had capital loss carryforwards in the amount of $269,385 and $23,205,714, respectively, that expired unutilized as of June 30, 2009.

Post-October losses are deemed to arise on the first business day of a Fund's next taxable year. For the year ended June 30, 2009, the following Funds incurred, and elected to defer, losses of the following:

Fund	Net capital losses		Net currency losses
UBS Absolute Return Bond Fund	$	34,939,027	$	6,795,241
UBS Global Bond Fund		12,393,941		—
UBS High Yield Fund		29,452,263		—
UBS U.S. Bond Fund		33,248,628		—

As of and during the period ended December 31, 2009, the Funds did not have any liabilities for any unrecognized tax benefits. The Funds recognize interest and penalties, if any, related to unrecognized tax positions as income tax expense in the Statement of operations. During the period, the Funds did not incur any interest or penalties.

Each of the tax years in the four year period ended June 30, 2009, remains subject to examination by the Internal Revenue Service and state taxing authorities.

8. Line of credit

The Trust has entered into an agreement with JPMorgan Chase Bank to provide a $75 million committed line of credit to the Funds ("Committed Credit Facility") to be utilized for temporary financing until the settlement of shares or purchases of portfolio securities, the repurchase or redemption of shares of each Fund at the request of shareholders and other temporary or emergency purposes. Interest on amounts borrowed is calculated based on the federal funds rate in effect at the time of borrowing, plus 0.75%. Under the Committed Credit Facility arrangement, each Fund has agreed to pay commitment fees, pro rata, based on

89

The UBS Funds

Notes to financial statements

the relative asset size of the Funds in the Committed Credit Facility. The average daily borrowings under the agreement for the period ended December 31, 2009, were as follows:

Fund	Average daily borrowings		Number of days Outstanding		Interest expense		Weighted average annualized interest rate
UBS High Yield Fund	$	905,000		4	$	94		0.94	%

At December31, 2009, there was an outstanding balance of $472,691 for UBS High Yield Fund.

9. Shares of beneficial interest

For the period ended December 31, 2009, transactions in shares of beneficial interest for each of the Funds were as follows:

UBS Absolute Return Bond Fund

	Class A						Class C						Class Y
	Shares			Amount			Shares			Amount			Shares			Amount
Shares sold		71,655		$	483,903			14,242		$	105,474			—		$	—
Shares repurchased		(625,575	)		(4,035,582	)		(187,856	)		(1,211,643	)		(1,011	)		(42,066	)
Dividends reinvested		30,209			194,248			7,045			45,298			302,854			1,947,351
Net increase (decrease)		(523,711	)	$	(3,357,431	)		(166,569	)	$	(1,060,871	)		301,843		$	1,905,285

UBS Global Bond Fund

	Class A						Class B
	Shares			Amount			Shares			Amount
Shares sold		203,396		$	1,539,675			3,919		$	30,259
Shares repurchased		(237,373	)		(1,794,944	)		(733	)		(5,375	)
Shares converted from Class B to Class A		841			6,421			(838	)		(6,421	)
Dividends reinvested		16,316			122,834			208			1,575
Net increase (decrease)		(16,820	)	$	(126,014	)		2,556		$	20,038

	Class C						Class Y
	Shares			Amount			Shares			Amount
Shares sold		55,963		$	419,753			594,075		$	5,043,351
Shares repurchased		(25,076	)		(189,915	)		(2,075,419	)		(17,806,232	)
Dividends reinvested		3,221			24,180			34,493			295,502
Net increase (decrease)		34,108		$	254,018			(1,446,851	)	$	(12,467,379	)

90

The UBS Funds

Notes to financial statements

UBS High Yield Fund

	Class A						Class B
	Shares			Amount			Shares			Amount
Shares sold		429,229		$	2,411,962			4,005		$	22,482
Shares repurchased		(2,190,545	)		(11,802,473	)		(16,754	)		(89,654	)
Shares converted from Class B to Class A		2,139			12,149			(2,139	)		(12,149	)
Dividends reinvested		194,038			1,092,277			3,724			20,977
Net decrease		(1,565,139	)	$	(8,286,085	)		(11,164	)	$	(58,344	)

	Class C						Class Y
	Shares			Amount			Shares			Amount
Shares sold		163,913		$	934,610			580,416		$	3,338,387
Shares repurchased		(102,366	)		(579,538	)		(5,689,265	)		(30,988,666	)
Dividends reinvested		41,094			231,481			401,845			2,271,117
Redemption fees		—			—			—			311
Net increase (decrease)		102,641		$	586,553			(4,707,004	)	$	(25,378,851	)

UBS US Bond Fund

	Class A						Class B
	Shares			Amount			Shares			Amount
Shares sold		118,563		$	1,002,886			—		$	—
Shares repurchased		(252,558	)		(2,151,855	)		(12	)		(106	)
Shares converted from Class B to Class A		949			8,111			(948	)		(8,111	)
Dividends reinvested		34,534			290,908			443			3,724
Redemption fees		—			720			—			—
Net decrease		(98,512	)	$	(849,230	)		(517	)	$	(4,493	)

	Class C						Class Y
	Shares			Amount			Shares			Amount
Shares sold		18,137		$	150,385			1,019,395		$	8,551,145
Shares repurchased		(30,448	)		(256,501	)		(3,343,163	)		(28,246,806	)
Dividends reinvested		10,460			87,867			223,107			1,876,688
Redemption fees		—			—			—			2,623
Net decrease		(1,851	)	$	(18,249	)		(2,100,661	)	$	(17,816,350	)

For the year ended June 30, 2009, transactions in shares of beneficial interest for each of the Funds were as follows:

UBS Absolute Return Bond Fund

	Class A						Class C						Class Y
	Shares			Amount			Shares			Amount			Shares			Amount
Shares sold		309,296		$	2,220,375			74,056		$	492,799			51,760		$	407,073
Shares repurchased		(4,378,056	)		(30,803,963	)		(630,509	)		(4,346,811	)		(5,584,328	)		(43,263,097	)
Dividends reinvested		380,701			2,418,045			90,266			570,595			2,162,996			13,660,426
Redemption fees		—			5,996			—			757			—			—
Net decrease		(3,688,059	)	$	(26,159,547	)		(466,187	)	$	(3,282,660	)		(3,369,572	)	$	(29,195,598	)

91

The UBS Funds

Notes to financial statements

UBS Global Bond Fund

	Class A						Class B
	Shares			Amount			Shares			Amount
Shares sold		325,664		$	2,540,092			6,575		$	47,353
Shares repurchased		(725,643	)		(5,631,648	)		(19	)		(152	)
Shares converted from Class B to Class A		5,516			38,722			(5,501	)		(38,722	)
Dividends reinvested		186,593			1,382,005			1,855			13,735
Redemption fees		—			1,120			—			—
Net increase (decrease)		(207,870	)	$	(1,669,709	)		2,910		$	22,214

	Class C						Class Y
	Shares			Amount			Shares			Amount
Shares sold		80,927		$	595,188			3,509,825		$	32,882,395
Shares repurchased		(37,844	)		(284,178	)		(6,358,293	)		(56,097,953	)
Dividends reinvested		30,791			226,245			723,055			6,087,911
Redemption fees		—			802			—			1,413
Net increase (decrease)		73,874		$	538,057			(2,125,413	)	$	(17,126,234	)

UBS High Yield Fund

	Class A						Class B
	Shares			Amount			Shares			Amount
Shares sold		2,194,797		$	10,022,988			5,435		$	29,443
Shares repurchased		(1,544,956	)		(7,599,585	)		(53,700	)		(275,447	)
Shares converted from Class B to Class A		26,706			144,250			(26,700	)		(144,250	)
Dividends reinvested		497,651			2,403,684			10,563			51,628
Redemption fees		—			22,521			—			—
Net increase (decrease)		1,174,198		$	4,993,858			(64,402	)	$	(338,626	)

	Class C						Class Y
	Shares			Amount			Shares			Amount
Shares sold		227,849		$	1,076,360			3,580,691		$	18,042,933
Shares repurchased		(298,810	)		(1,568,007	)		(9,159,332	)		(47,124,194	)
Dividends reinvested		76,090			369,310			1,419,479			6,985,446
Redemption fees		—			325			—			3,183
Net increase (decrease)		5,129		$	(122,012	)		(4,159,162	)	$	(22,092,632	)

92

The UBS Funds

Notes to financial statements

UBS U.S. Bond Fund

	Class A						Class B
	Shares			Amount			Shares			Amount
Shares sold		744,830		$	6,095,354			5,526		$	46,040
Shares repurchased		(729,755	)		(6,035,185	)		(5,977	)		(51,628	)
Shares converted from Class B to Class A		14,728			127,368			(14,723	)		(127,368	)
Dividends reinvested		65,661			530,962			1,141			9,212
Redemption fees		—			10,551			—			—
Net increase (decrease)		95,464		$	729,050			(14,033	)	$	(123,744	)

	Class C						Class Y
	Shares			Amount			Shares			Amount
Shares sold		244,703		$	1,973,748			4,612,977		$	39,218,469
Shares repurchased		(62,167	)		(512,531	)		(9,794,703	)		(82,185,951	)
Dividends reinvested		10,733			86,350			711,369			5,762,002
Redemption fees		—			1,524			—			5,033
Net increase (decrease)		193,269		$	1,549,091			(4,470,357	)	$	(37,200,447	)

10. Subsequent events

Events after the date of the Statement of assets and liabilities are evaluated through the date of issuance of the financial statements. The Funds had no material subsequent events that occurred between the date of the Statement of assets and liabilities through the date of issuance of the financial statements that required disclosure in or adjustment to the financial statements.

93

The UBS Funds

General information (unaudited)

Quarterly Form N-Q portfolio schedule

The Funds will file their complete schedule of portfolio holdings with the Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. The Funds' Forms N-Q are available on the SEC's Web site at http://www.sec.gov. The Funds' Forms N-Q may be reviewed and copied at the SEC's Public Reference Room in Washington, D.C. Information on the operation of the SEC's Public Reference Room may be obtained by calling 1-800-SEC 0330. Additionally, you may obtain copies of Forms N-Q from the Funds upon request by calling 1-800-647 1568.

Proxy voting policies, procedures and record

You may obtain a description of the Funds' (1) proxy voting policies, (2) proxy voting procedures and (3) information regarding how the Funds voted any proxies related to portfolio securities during the most recent 12-month period ended June 30 for which an SEC filing has been made, without charge, upon request by contacting the Funds directly at 1-800-647 1568, online on the Funds' Web site: www.ubs.com/ubsglobalam-proxy, or on the EDGAR Database on the SEC's Web site (http://www.sec.gov).

94

The UBS Funds—Equities

Semiannual Report

December 31, 2009

Table of contents
President's letter	1
Market commentary	2
Equities
UBS Global Equity Fund	4
UBS International Equity Fund	12
UBS U.S. Equity Alpha Fund	22
UBS U.S. Large Cap Equity Fund	32
UBS U.S. Large Cap Value Equity Fund	40
UBS U.S. Mid Cap Growth Equity Fund	47
UBS U.S. Small Cap Growth Fund	55
Explanation of expense disclosure	62
Statement of assets and liabilities	66
Statement of operations	70
Statement of changes in net assets	72
Financial highlights	76
Notes to financial statements	90
General information	111

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President's letter

February 17, 2010

Dear shareholder,

The market developments of the past several months highlight the importance of remaining steadfast to established investment processes and valuation disciplines.

When I last wrote to you on these pages six months ago, the S&P 500 Index was in the early stages of attempting to climb back from one of the steepest declines in its history, investor confidence was at an all-time low and the investing landscape appeared to be undergoing unprecedented changes.

Today, we can observe that both the S&P 500 Index and the MSCI World Free Index (net)—proxies of stock performance in the US and global markets, respectively—have generated solid double-digit returns. What's more, confidence appears to be returning to the markets—albeit tentatively—as investors begin to venture back into riskier assets. That said, however, the markets continue to face the very challenging task of assessing the risks of deflation versus inflation.

Despite the many changes and challenges faced by investors throughout the recent bear market, what remained the same is our unwavering commitment to provide you with investment solutions designed to help you reach your long-term goals. We firmly believe that key to delivering on this commitment in any market environment is adherence to the disciplines and processes that, in our view, have proven their investment value over time.

Today, I am pleased to report that we are being rewarded for maintaining this conviction, as a number of the UBS Funds have generated solid performance versus their respective benchmarks over the review period. Still, as satisfying as it is for me to report this news to you, I find myself already looking to the future. No one can rely on past performance when it comes to delivering future results. We are keenly aware that we need to remain nimble—constantly growing and evolving to meet the challenges that will be presented by this brave new market landscape. In the past, I have written of some of the measures we have already taken to this end, including restructuring our fixed income investment team, and broadening the reach of some of our investment capabilities to ensure they are well-positioned to navigate the marketplace.

More recently, we have continued to build out what I believe is an impressive organization of investment professionals who have the experience and insight required to take our shareholders through the next decade and beyond. This includes bringing on board Andreas Koester, who became Head of Asset Allocation for our Global Investment Solutions team in September 2009. In this role, Andreas has helped implement process refinements and a team restructuring that we believe will better position our multi-asset portfolios in the years to come.

We don't take lightly the responsibility you assigned to us when you chose us as your asset manager. I thank you, as always, for your continued support.

Kai R. Sotorp
President
UBS Funds
Head—Americas
UBS Global Asset Management (Americas) Inc.

1

The markets in review

Strengthening economic conditions

While economic growth in the US remained strained when the reporting period began, the recession—considered to be the longest since the Great Depression—appears to have ended. Signs of a turnaround first emerged in the second quarter of 2009, when gross domestic product ("GDP") fell at a more modest pace than in prior quarters. Subsequently, third quarter GDP grew 2.2%, in large part due to the government's efforts to stimulate the economy. Some of the measures instituted by the government included an $8,000 tax credit for first-time home buyers, as well as the "Cash for Clunkers" car rebate program. As the period drew to a close, economic growth continued to accelerate, as evidenced by the 5.7% advance estimate for fourth quarter GDP.

Economic growth also improved overseas. During the reporting period, data was released indicating that the recessions in Germany and France concluded during the second quarter of 2009, while economic growth in the UK and Japan also resumed. In many instances, growth rates in emerging markets countries held up relatively better than their developed country counterparts. As a case in point, although growth moderated in China, it avoided falling into a recession.

The global equity markets continued to rally

The global equity markets, which started to rebound in March 2009, continued to move higher over the six-months ended December 31, 2009. The S&P 500 Index¹ posted positive returns during five of the last six months of 2009, and gained 22.59% over the reporting period as a whole. The market's continued ascent was due to a variety of factors, including further improvements in the credit markets, signs that the economy was recovering, better-than-expected corporate profits and robust investor risk appetites.

The international equity markets also generated strong results during the reporting period. International developed stocks, as measured by the MSCI EAFE Index (net),² returned 22.07% during the six months ended December 31, 2009. Emerging markets equities generated even better results, with the MSCI Emerging Markets Index³ gaining 31.42% over the same period. Rising commodity prices and an improving economic backdrop were two of the factors supporting emerging market equity prices.

¹  The S&P 500 Index is an unmanaged, weighted index composed of 500 widely held common stocks varying in composition, and is not available for direct investment. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

²  The MSCI EAFE Index (net) is an index of stocks from 21 countries designed to measure the investment returns of developed economies outside of North America. Dividends are reinvested after the deduction of withholding tax, using tax rates applicable to Luxembourg holding companies, as Luxembourg applies the highest rates. The Index is constructed and managed with a view to being fully investable from the perspective of international institutional investors. Investors should note that indices do not reflect the deduction of fees and expenses.

³  The MSCI Emerging Markets Index is a market capitalization-weighted index composed of companies representative of the market structure of 22 emerging market countries in Europe, Latin America, and the Pacific Basin. The Index is constructed and managed with a view to being fully investable from the perspective of international institutional investors. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

2

The markets in review

Risk-taking is rewarded in the fixed income markets

The US bond market generated positive results during the reporting period. In sharp contrast to late 2008 and early 2009, when investors were drawn to the relative safety of short-term Treasuries, risk aversion continued to abate over the six months covered by this report. This change in investor sentiment was due to a number of factors, including economic conditions that transitioned from being "less negative" to showing signs of meaningful improvement. Against this backdrop, the US spread sectors (non-Treasuries) generated strong results during the reporting period.

Overall, during the six months ended December 31, 2009, the overall US bond market, as measured by the Barclays Capital US Aggregate Index,⁴ returned 3.95%. Looking at the riskier fixed income asset classes, high yield bonds and emerging markets debt generated very strong results over the six-month reporting period. During that time, the Merrill Lynch US High Yield Cash Pay Constrained Index⁵ gained 21.10%, while the J.P. Morgan Emerging Markets Bond Index Global (EMBI Global)⁶ rose 11.89%.

⁴  The Barclays Capital US Aggregate Index (formerly known as the Lehman Brothers US Aggregate Index) is an unmanaged index of the USD-denominated, investment-grade, fixed-rate, taxable bond market of SEC-registered securities. The index includes bonds from the treasury, government-related, corporate, mortgage-backed, asset-backed and commercial mortgage-backed sectors. US agency hybrid adjustable rate mortgage (ARM) securities were added to the Index on April 1, 2007. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

⁵  The Merrill Lynch US High Yield Cash Pay Constrained Index is the index of publicly placed non-convertible, coupon-bearing US dollar denominated below investment grade corporate debt with a term to maturity of at least one year. The index is market weighted, so that larger bond issuers have a greater effect on the index's return. However, the representation of any single bond issue is restricted to a maximum of 2% of the total index. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

⁶  The J.P. Morgan Emerging Markets Bond Index Global (EMBI Global) is an unmanaged index which tracks total returns for US-dollar-denominated debt instruments issued by emerging market sovereign and quasi-sovereign entities: Brady bonds, loans and Eurobonds. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

3

UBS Global Equity Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS Global Equity Fund (the "Fund") returned 26.65% (Class A shares returned 19.69% after the deduction of the maximum sales charge), while Class Y shares returned 26.77%. The Fund's benchmark, the MSCI World Free Index (net) (the "Index"), returned 22.23% over the same time period. (Class Y shares have lower expenses than other share classes in the series. Returns for all share classes over various time periods are shown on page 6; please note that these returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund outperformed its benchmark during the reporting period, primarily due to widespread stock selection gains.

Portfolio performance summary¹

What worked

•  Stock selection contributed positively in eight out of the 10 global sectors during the reporting period. The Fund's energy and information technology stocks made the strongest contributions to relative performance.

  – Within energy, the most successful holding was an overweight position in Petroleum Geo Services (PGS), a Norway-based oil services company. The holding in PGS was reduced in December as we took profits on the position. (For details, see "Portfolio highlights.")

Conversely, the Fund also benefited from the decision not to hold Exxon Mobil, which underperformed during the period.

  – In the information technology sector, outperformance was driven by holdings including HON HAI Precision. Shares of the Taiwan electronics component manufacturer rose strongly during the reporting period. (For details, see "Portfolio highlights.")

  – Other stock positions that had a positive impact on performance included Norwegian telecom services company Telenor and Australian carrier Qantas Airways. Telenor benefited from its significant presence in central and Eastern Europe. (For details, see "Portfolio highlights.")

•  At the market level, the Fund's exposure to emerging markets made a significant contribution to relative returns. Emerging markets outperformed developed economies during the period, largely due to stronger fiscal situations. The Fund held overweight positions in Russia, Taiwan and Brazil because our research viewed them as extremely undervalued. This stance was rewarded during the six months.

What didn't work

•  Stock selection within the financial sector detracted from performance. In particular, Japanese financials such as Sumitomo Mitsui Financial and Nomura Holdings disappointed. Barclays also made a negative contribution to relative returns.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

4

UBS Global Equity Fund

•  The Fund's utilities stocks failed to keep pace with the market during the six months. Defensive stocks and cyclicals lagged the market as global stock prices rallied. In this space, an overweight position in US power plant owner and operator Dynegy Inc. was negative for performance.

•  Within consumer staples, an overweight holding in Japan Tobacco detracted from performance for the period. However, JT shares rallied toward the end of the period on news that the new tobacco tax regime in Japan would not be as onerous as the market had expected, as well as in reaction to a weaker yen. We maintain our position in the stock. (For details, see "Portfolio highlights.")

Portfolio highlights

•  We have positioned the portfolio toward companies involved in oil services, as well as exploration and production, because we believe these will be the best investment areas as energy companies increasingly explore in more complex and challenging geological structures. Portfolio holding Petroleum Geo-Services is one example of this type of company, and it has performed well as this trend has continued.

•  The Fund benefited from holding Telenor, the incumbent telecom operator in Norway, which is also partly owned by the government. The company enjoys high market share in both the domestic fixed (land) line and mobile sectors, as well as several overseas operations in Eastern Europe and Asia. The shares performed well during the six-month period as investors recognized the strength of the company's domestic cash generation and the underlying value in the emerging markets businesses.

•  The Fund benefited from holding HON HAI Precision. The stock posted strong operating margins for much of the period. It also embarked on renewed hiring that we believe will result in greater revenue momentum going forward. After a massive relocation exercise in 2008, we expect significant cost savings to accrue over time. HON HAI should be gaining market share over the next two to three years, as outsourcing increases and cost pressure from labor and materials becomes a greater burden to smaller companies.

•  Japan Tobacco is one of the cheapest tobacco companies in the world on a cash flow basis. We believe the company's international business is underrated compared with its peers. The market has focused on the impact of Japan's new political regime on the company's domestic business and the tax implications for Japan Tobacco. While we believe the market is probably overly concerned over this issue, it may hold the valuation of the company back until there is more clarity.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

5

UBS Global Equity Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		26.65	%		45.05	%		2.16	%		2.20	%		3.62	%
Class B3		26.17	%		44.00	%		1.40	%		N/A			3.63	%6
Class C4		26.16	%		43.98	%		1.38	%		N/A			3.40	%
Class Y5		26.77	%		45.37	%		2.44	%		2.52	%		5.92	%
After deducting maximum sales charge
Class A2		19.69	%		37.09	%		1.01	%		1.62	%		3.15	%
Class B3		21.17	%		39.00	%		1.02	%		N/A			3.63	%6
Class C4		25.16	%		42.98	%		1.38	%		N/A			3.40	%
MSCI World Free Index (net)7		22.23	%		29.99	%		2.01	%		(0.24	)%		5.57	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.48% and 1.48%; Class B—2.25% and 2.25%; Class C—2.30% and 2.25%; Class Y—1.08% and 1.08%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The net expenses listed above reflect the management fee waiver/expense reimbursements put in place for the fiscal year ending June 30, 2010. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred throug h investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.50% for Class A shares, 2.25% for Class B shares, 2.25% for Class C shares and 1.25% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund. Pursuant to the previous fee waiver and expense reimbursement agreement, the actual "Net expenses" for the fiscal year ending June 30, 2009 were 1.25% for the Class A shares, 2.00% for the Class B shares, 2.00% for the Class C shares and 1.00% for the Class Y shares.

¹  Inception date of UBS Global Equity Fund Class A shares is June 30, 1997. Inception dates of Class B and Class C shares are December 11, 2001 and November 27, 2001, respectively. Inception date of Class Y shares is January 28, 1994. The inception return of the index is calculated as of January 31, 1994, which is the closest month-end to the inception date of the oldest share class (Class Y).

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The MSCI World Free Index (net) is a free float-adjusted market capitalization weighted index that is designed to measure the equity market performance of developed markets. As of June 2007, the index consisted of 23 developed market country indices. Dividends are reinvested after deduction of withholding tax, using tax rates applicable to Luxembourg holding companies, as Luxembourg applies the highest rates. Had US tax rates been applied, the performance of the index would be different. The index is constructed and managed with a view to being fully investable from the perspective of international institutional investors. Investors should note that indices do not reflect the deduction of fees and expenses.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

6

UBS Global Equity Fund

Top ten equity holdings (unaudited)

As of December 31, 2009

	Percentage of net assets
Microsoft Corp.		2.3	%
Vodafone Group PLC		2.1
Roche Holding AG		1.9
HON HAI Precision Industry Co., Ltd.		1.9
Rio Tinto Ltd.		1.8
Hewlett-Packard Co.		1.7
Bank of America Corp.		1.6
Naspers Ltd., Class N		1.5
GlaxoSmithKline PLC		1.5
Mitsubishi Corp.		1.5
Total		17.8	%

Country exposure, top five (unaudited)

As of December 31, 2009

	Percentage of net assets
United States		41.2	%
Japan		9.2
United Kingdom		8.4
Russia		4.0
Switzerland		3.9
Total		66.7	%

7

UBS Global Equity Fund

Industry diversification (unaudited)

As a percentage of net assets as of December 31, 2009

Common stocks

Airlines	2.43	%
Auto components	0.63
Automobiles	2.06
Beverages	0.80
Biotechnology	0.84
Capital markets	3.05
Chemicals	2.01
Commercial banks	8.00
Commercial services & supplies	2.54
Computers & peripherals	2.56
Construction materials	3.51
Consumer finance	2.03
Diversified financial services	2.83
Diversified telecommunication services	1.44
Electric utilities	1.28
Electronic equipment, instruments & components	1.85
Energy equipment & services	1.72
Food & staples retailing	4.30
Food products	1.07
Health care equipment & supplies	3.54
Health care providers & services	0.82
Household durables	1.14
Independent power producers & energy traders	0.64
Industrial conglomerates	1.01
Insurance	2.05
Internet & catalog retail	1.00
IT services	1.16
Marine	0.64
Media	2.59
Metals & mining	4.05
Multi-utilities	0.92
Office electronics	1.24
Oil, gas & consumable fuels	7.21
Personal products	1.22
Pharmaceuticals	6.29
Professional services	1.14
Real estate management & development	1.68
Semiconductors & semiconductor equipment	2.40
Software	4.76
Specialty retail	1.31
Tobacco	2.53
Trading companies & distributors	1.52
Wireless telecommunication services	3.16
Total common stocks	98.97	%
Preferred stock	0.27
Short-term investment	0.04
Total investments	99.28	%
Cash and other assets, less liabilities	0.72	%
Net assets	100.00	%

8

UBS Global Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 98.97%
Australia: 2.97%
Qantas Airways Ltd.		678,529	$	1,803,373
Rio Tinto Ltd.		39,351		2,603,689
Total Australia common stocks				4,407,062
Belgium: 1.74%
Anheuser-Busch InBev NV		23,023		1,189,463
Delhaize Group SA		18,229		1,396,209
Total Belgium common stocks				2,585,672
Brazil: 1.38%
Vale SA ADR		70,700		2,052,421
Cayman Islands: 0.86%
Seagate Technology		70,100		1,275,119
China: 1.90%
China Merchants Bank Co., Ltd., H Shares		503,500		1,306,179
New World Development Ltd.		740,000		1,510,307
Total China common stocks				2,816,486
Finland: 0.76%
Sampo Oyj, Class A		46,582		1,130,527
France: 1.92%
BNP Paribas		19,326		1,525,085
Carrefour SA		27,674		1,330,550
Total France common stocks				2,855,635
Germany: 2.53%
HeidelbergCement AG		26,456		1,819,795
Metro AG		31,788		1,937,581
Total Germany common stocks				3,757,376
India: 1.16%
Infosys Technology Ltd., ADR		31,100		1,718,897
Indonesia: 2.22%
Astra International Tbk PT		339,000		1,245,283
Bank Rakyat Indonesia PT		1,340,500		1,083,151
Bumi Resources Tbk PT		3,751,500		968,704
Total Indonesia common stocks				3,297,138
Ireland: 2.91%
Covidien PLC		44,204		2,116,930
CRH PLC		81,430		2,205,749
Total Ireland common stocks				4,322,679

	Shares		Value
Japan: 9.25%
Japan Tobacco, Inc.		496	$	1,673,583
Mitsubishi Corp.		91,000		2,262,518
Mitsui OSK Lines Ltd.		182,000		955,373
Nissan Motor Co., Ltd.*		207,800		1,816,172
Nomura Holdings, Inc.		211,200		1,556,453
ORIX Corp.		19,760		1,343,790
Ricoh Co., Ltd.		131,000		1,847,631
Shin-Etsu Chemical Co., Ltd.		21,400		1,206,222
Sumitomo Mitsui Financial Group, Inc.		37,900		1,080,514
Total Japan common stocks				13,742,256
Mexico: 1.21%
Grupo Financiero Banorte SAB de CV, Class O		492,000		1,799,211
Netherlands: 3.15%
ASML Holding NV		48,179		1,638,711
ING Groep NV CVA*		192,294		1,858,940
James Hardie Industries NV, CDI*		157,188		1,185,189
Total Netherlands common stocks				4,682,840
Norway: 2.15%
Petroleum Geo-Services ASA*		92,000		1,044,732
Telenor ASA*		152,700		2,141,881
Total Norway common stocks				3,186,613
Russia: 4.01%
Gazprom OAO ADR		75,829		1,890,233
Mobile Telesystems OJSC ADR		30,500		1,491,145
Novolipetsk Steel OJSC GDR*1		45,461		1,369,519
Sberbank GDR1		4,255		1,200,936
Total Russia common stocks				5,951,833
Singapore: 0.66%
CapitaLand Ltd.		332,000		983,375
South Africa: 1.54%
Naspers Ltd., Class N		56,554		2,295,023
Switzerland: 3.89%
Nobel Biocare Holding AG		38,285		1,281,317
Roche Holding AG		16,444		2,797,390
SGS SA		1,304		1,697,995
Total Switzerland common stocks				5,776,702
Taiwan: 1.85%
HON HAI Precision Industry Co., Ltd.		585,000		2,751,961

9

UBS Global Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Thailand: 1.31%
Bank of Ayudhya PCL		2,899,400	$	1,949,370
United Kingdom: 8.43%
Barclays PLC		439,310		1,935,897
GlaxoSmithKline PLC		107,699		2,281,404
Home Retail Group PLC		327,582		1,493,251
Man Group PLC		367,732		1,808,900
Tullow Oil PLC		87,077		1,815,897
Vodafone Group PLC		1,376,252		3,186,986
Total United Kingdom common stocks				12,522,335
United States: 41.17%
Aflac, Inc.		41,600		1,924,000
Allergan, Inc.		34,900		2,199,049
Altria Group, Inc.		105,700		2,074,891
Autodesk, Inc.*		77,000		1,956,570
Bank of America Corp.		156,000		2,349,360
BorgWarner, Inc.		28,000		930,160
Comcast Corp., Class A		92,100		1,552,806
Discover Financial Services		113,083		1,663,451
Dynegy, Inc., Class A*		525,400		950,974
EOG Resources, Inc.		16,000		1,556,800
Exelon Corp.		38,800		1,896,156
Fortune Brands, Inc.		39,200		1,693,440
Genzyme Corp.*		25,400		1,244,854
Halliburton Co.		49,700		1,495,473
Hess Corp.		30,500		1,845,250
Hewlett-Packard Co.		48,900		2,518,839
Intel Corp.		94,900		1,935,960
Kraft Foods, Inc., Class A		58,400		1,587,312
Lowe's Cos., Inc.		83,200		1,946,048
Mead Johnson Nutrition Co., Class A		41,363		1,807,563
Microsoft Corp.		110,000		3,353,900
Monsanto Co.		21,800		1,782,150
Morgan Stanley		39,400		1,166,240

	Shares		Value
Peabody Energy Corp.		23,100	$	1,044,351
Pfizer, Inc.		113,500		2,064,565
Pitney Bowes, Inc.		75,900		1,727,484
Republic Services, Inc.		72,600		2,055,306
Sempra Energy		24,500		1,371,510
Southwest Airlines Co.		157,100		1,795,653
Sysco Corp.		62,000		1,732,280
Textron, Inc.		79,900		1,502,919
Ultra Petroleum Corp.*		32,200		1,605,492
UnitedHealth Group, Inc.		39,900		1,216,152
VMware, Inc., Class A*		41,612		1,763,517
Zimmer Holdings, Inc.*		31,400		1,856,054
Total United States common stocks				61,166,529
Total common stocks
(cost $112,913,042)				147,027,060
Preferred stock: 0.27%
United States: 0.27%
Bank of America Corp., 10.000%* (cost $398,235)		26,549		396,111
Short-term investment: 0.04%
Investment company: 0.04%
UBS Cash Management Prime Relationship Fund, 0.120%2,3 (cost $63,307)		63,307		63,307
Total investments: 99.28%
(cost $113,374,584)				147,486,478
Cash and other assets, less liabilities: 0.72%				1,068,634
Net assets: 100.00%			$	148,555,112

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $113,374,584; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	35,471,254
Gross unrealized depreciation		(1,359,360	)
Net unrealized appreciation of investments	$	34,111,894

*  Non-income producing security.

¹  Security exempt from registration under Regulations S of the Securities Act of 1933. Regulation S applies to securities offerings that are made outside of the United States and do not involve direct selling efforts in the United States. At December 31, 2009, the value of these securities amounted to $2,570,455 or 1.73% of net assets..

²  Investment in affiliated investment company.

³  The rate shown reflects the yield at December 31, 2009.

ADR  American depositary receipt

CVA  Dutch certification—depositary certificate

CDI  Chess depositary interest

GDR  Global depositary receipt

10

UBS Global Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

Forward foreign currency contracts

UBS Global Equity Fund had the following open forward foreign currency contracts as of December 31, 2009:

	Contracts to deliver		In exchange for		Maturity dates	Unrealized appreciation/ (depreciation)
Australian Dollar		2,645,000	USD	2,433,532	03/03/10	$	71,256
Brazilian Real		3,280,000	USD	1,856,989	03/03/10		(5,530	)
Canadian Dollar		820,000	USD	778,495	03/03/10		(5,557	)
Euro		4,360,000	USD	6,562,609	03/03/10		312,723
Japanese Yen		48,700,000	USD	530,501	01/04/10		7,604
Japanese Yen		155,200,000	USD	1,729,325	03/03/10		62,462
New Taiwan Dollar		95,500,000	USD	2,996,548	03/03/10		(37,755	)
Norwegian Krone		12,410,000	USD	2,214,952	03/03/10		76,963
South African Rand		6,330,000	USD	843,078	03/03/10		(5,479	)
Swiss Franc		4,070,000	USD	4,069,308	03/03/10		133,747
Thai Baht		51,250,000	USD	1,544,838	03/03/10		7,864
United States Dollar		6,531,750	CAD	6,865,000	03/03/10		32,289
United States Dollar		412,635	CHF	425,000	03/03/10		(1,674	)
United States Dollar		726,334	DKK	3,590,000	03/03/10		(35,202	)
United States Dollar		752,056	GBP	470,000	03/03/10		6,867
United States Dollar		1,802,396	GBP	1,080,000	03/03/10		(58,487	)
United States Dollar		2,574,657	JPY	225,800,000	03/03/10		(149,543	)
United States Dollar		972,793	NOK	5,640,000	03/03/10		(1,136	)
United States Dollar		7,204,249	SEK	49,580,000	03/03/10		(272,378	)
United States Dollar		3,596,966	SGD	4,970,000	03/03/10		(61,613	)
United States Dollar		194,268	TWD	6,100,000	03/03/10		(453	)
Net unrealized appreciation on forward foreign currency contracts						$	76,968

Currency type abbreviations:

CAD  Canadian Dollar

CHF  Swiss Franc

DKK  Danish Krone

GBP  Great Britain Pound

JPY  Japanese Yen

NOK  Norwegian Krone

SEK  Swedish Krona

SGD  Singapore Dollar

TWD  New Taiwan Dollar

USD  United States Dollar

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks1	$	71,620,252	$	75,406,808	$	—	$	147,027,060
Preferred stock		—		396,111		—		396,111
Short-term investment		—		63,307		—		63,307
Other financial instruments2		—		76,968		—		76,968
Total	$	71,620,252	$	75,943,194	$	—	$	147,563,446

¹  The Fund may hold investments which have been fair valued in accordance with the Fund's fair valuation policy as of December 31, 2009, which may result in movement between Level 1 and Level 2.

²  Other financial instruments may include open futures contracts, swap agreements, options and forward foreign currency contracts.

See accompanying notes to financial statements.
11

UBS International Equity Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS International Equity Fund (the "Fund") returned 22.61% (Class A shares returned 15.81% after the deduction of the maximum sales charge), while Class Y shares returned 22.70%. The Fund's benchmark, the MSCI World Free ex USA Index (net) (the "Index"), returned 22.27% over the same time period. (Class Y shares have lower expenses than other share classes in the series. Returns for all share classes over various time periods are shown on page 14; please note that these returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund slightly outperformed its benchmark during the reporting period, primarily due to stock selection gains within most sectors.

Portfolio performance summary¹

What worked

•  Stock selection contributed positively in eight out of the 10 global sectors during the reporting period. The Fund's consumer discretionary, information technology and energy stocks made the strongest contributions to relative performance.

  – In the information technology sector, outperformance was driven by holdings, including HON HAI Precision (an out-of benchmark position). Shares of the Taiwan electronics component manufacturer rose strongly during the reporting period, in part because of the company's supplier relationship with Apple, and was additive to performance. (For details, see "Portfolio highlights.") The Fund's position in European chip manufacturer ASML Holding was also positive for performance.

  – Within energy, the most successful holding was an overweight position in Petroleum Geo Services (PGS), a Norway-based oil services company. The holding in PGS was reduced in December as we took profits on the position. (For details, see "Portfolio highlights.")

  – Other stock positions that had a positive impact on performance included Norwegian telecom services company Telenor, which benefited from its significant presence in central and Eastern Europe. (For details, see "Portfolio highlights.") Australian carrier Qantas Airways, Brazil resource company Vale SA and South African media company Naspers also made strong contributions to relative returns.

•  The Fund's exposure to emerging markets made a significant contribution to relative returns. Emerging markets outperformed developed economies during the period, largely due to stronger fiscal situations. Notably, the Fund held overweight positions in Russia, Taiwan and Brazil because our research viewed them as extremely undervalued—a stance that was rewarded during the six-month period.

What didn't work

•  Several financial stock positions were negative during the period. In particular, Japanese financials such as Sumitomo Mitsui Financial and Nomura Holdings disappointed due to overall weakness in Japan's banking sector. An underweight position in HSBC Holdings detracted as the commercial bank's shares rose strongly dur ing the period.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

12

UBS International Equity Fund

•  Stock selection within the consumer staples sector detracted from performance. An overweight position in Japan Tobacco detracted from performance for the period as a whole. The stock was attractively valued, but was hurt by a new tobacco tax imposed in Japan. However, JT shares rallied toward the end of the period on news that the tax would not be as onerous as the market had expected, as well as in reaction to a weaker yen. We maintain our position in the stock. (For details, see "Portfolio highlights.")

Portfolio highlights

•  The Fund benefited from holding Telenor, the incumbent telecom operator in Norway, which is also part owned by the government. The company enjoys high market share in both the domestic fixed (land) line and mobile sectors, as well as several overseas operations in Eastern Europe and Asia. The shares performed well during the six-month period, as investors recognized the strength of the company's domestic cash generation and the underlying value in the emerging markets businesses.

•  We have positioned the portfolio toward companies involved in oil services, as well as exploration and production, because we believe these will be the best investment areas as energy companies increasingly explore in more complex and challenging geological structures. Portfolio holding Petroleum Geo-Services is one example of this type of company, and it has performed well as this trend has continued.

•  The Fund benefited from holding HON HAI Precision. The stock posted strong operating margins for much of the period. It also embarked on renewed hiring that we believe will result in greater revenue momentum going forward. After a massive relocation exercise in 2008, we expect significant cost savings to accrue over time. HON HAI should be gaining market share over the next two to three years, as outsourcing increases and cost pressure from labor and materials becomes a greater burden to smaller companies.

•  Japan Tobacco is one of the cheapest tobacco companies in the world on a cash flow basis. We believe the company's international business is underrated compared with its peers. The market has focused on the impact of Japan's new political regime on the company's domestic business and the tax implications for Japan Tobacco. While we believe the market is probably overly concerned over this issue, it may hold the valuation of the company back until there is more clarity.

•  The Fund's underweight position (relative to the benchmark) in banking and financial services firm HSBC hurt performance during the period. HSBC reported better than expected financial results in early August, with the company's US business a key driver behind performance. HSBC also issued a positive interim management statement in mid-November. During the six-month period, the firm also said it's CEO would move from London to Hong Kong as the bank continues to focus on growth in Asia and in emerging markets countries.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

13

UBS International Equity Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		22.61	%		39.38	%		2.60	%		1.20	%		2.80	%
Class B3		22.07	%		38.26	%		1.83	%		N/A			5.14	%6
Class C4		22.20	%		38.35	%		1.85	%		N/A			4.89	%
Class Y5		22.70	%		39.65	%		2.82	%		1.40	%		4.66	%
After deducting maximum sales charge
Class A2		15.81	%		31.75	%		1.44	%		0.63	%		2.34	%
Class B3		17.07	%		33.26	%		1.54	%		N/A			5.14	%6
Class C4		21.20	%		37.35	%		1.85	%		N/A			4.89	%
MSCI World Free ex USA Index (net)7		22.27	%		33.67	%		4.07	%		1.62	%		5.25	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.60% and 1.28%; Class B—2.55% and 2.03%; Class C—2.41% and 2.03%; Class Y—1.45% and 1.03%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The Advisor has agreed irrevocably to waive its fees and reimburse certain expenses (excluding expenses incurred through investment in other investment companies and interest expense) so that total operating expenses (excluding expenses incurred through investment in other investment companies and interest expense) of the Fund do not exceed 1.25% for Class A shares, 2.00% for Class B shares, 2.00% for Class C shares and 1.00% for Class Y shares.

¹  Inception date of UBS International Equity Fund Class A shares is June 30, 1997. Inception dates of Class B and Class C shares are February 12, 2002 and January 25, 2002, respectively. Inception date of Class Y shares and the index is August 31, 1993.

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The MSCI World Free ex USA Index (net) is a free float-adjusted market capitalization weighted index that is designed to measure the equity market performance of developed markets excluding the United States. As of June 2007, the index consisted of 22 developed market country indices. Dividends are reinvested after deduction of withholding tax, using tax rates applicable to Luxembourg holding companies, as Luxembourg applies the highest rates. Had US tax rates been applied, the performance of the index would be different. The index is constructed and managed with a view to being fully investable from the perspective of international institutional investors. Investors should note that indices do not reflect the deduction of fees and expenses.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

14

UBS International Equity Fund

Top ten equity holdings (unaudited)

As of December 31, 2009

	Percentage of net assets
Roche Holding AG		1.8	%
Mitsubishi Corp.		1.7
Vodafone Group PLC		1.7
BNP Paribas		1.6
Rio Tinto PLC		1.5
Daimler AG		1.5
Nomura Holdings, Inc.		1.4
Anheuser-Busch InBev NV		1.3
Vale SA ADR		1.3
Gazprom OAO ADR		1.3
Total		15.1	%

Country exposure, top five (unaudited)

As of December 31, 2009

	Percentage of net assets
United Kingdom		17.5	%
Japan		15.4
Switzerland		6.9
Germany		6.4
China		5.9
Total		52.1	%

15

UBS International Equity Fund

Industry diversification (unaudited)

As a percentage of net assets as of December 31, 2009

Common stocks

Aerospace & defense	0.46	%
Airlines	1.23
Auto components	0.74
Automobiles	3.41
Beverages	1.90
Building products	0.88
Capital markets	2.58
Chemicals	1.94
Commercial banks	13.18
Communications equipment	0.37
Computers & peripherals	0.28
Construction & engineering	0.36
Construction materials	1.94
Consumer finance	0.61
Diversified financial services	1.05
Diversified telecommunication services	2.26
Electric utilities	2.61
Electrical equipment	0.81
Electronic equipment, instruments & components	1.29
Energy equipment & services	2.05
Food & staples retailing	2.23
Food products	2.18
Health care equipment & supplies	1.18
Hotels, restaurants & leisure	0.25
Household durables	0.53
Household products	0.48
Industrial conglomerates	0.43
Insurance	3.68
Internet & catalog retail	0.49
Internet software & services	0.59
IT services	0.84
Machinery	2.91
Marine	0.47
Media	1.43
Metals & mining	8.45
Office electronics	1.80
Oil, gas & consumable fuels	7.80
Pharmaceuticals	5.30
Professional services	0.72
Real estate management & development	2.73
Semiconductors & semiconductor equipment	3.57
Software	1.16
Specialty retail	1.24
Textiles, apparel & luxury goods	0.51
Tobacco	1.85
Trading companies & distributors	2.13
Wireless telecommunication services	3.26
Total common stocks	98.16	%
Short-term investment	0.01
Investment of cash collateral from securities loaned	2.49
Total investments	100.66	%
Liabilities, in excess of cash and other assets	(0.66	)
Net assets	100.00	%

16

UBS International Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 98.16%
Australia: 4.98%
AMP Ltd.		73,503	$	442,686
BHP Billiton Ltd.		15,235		583,406
Incitec Pivot Ltd.		107,372		340,271
MacArthur Coal Ltd.1		13,284		132,441
National Australia Bank Ltd.		21,336		519,173
Orica Ltd.		9,458		219,223
Qantas Airways Ltd.		163,362		434,178
Total Australia common stocks				2,671,378
Austria: 0.39%
Telekom Austria AG		14,517		207,268
Belgium: 2.05%
Anheuser-Busch InBev NV		13,849		715,496
Delhaize Group SA		4,992		382,351
Total Belgium common stocks				1,097,847
Bermuda: 0.35%
Seadrill Ltd.		7,500		189,978
Brazil: 2.18%
BM&F BOVESPA SA		15,000		104,248
Gafisa SA		13,000		210,779
Itau Unibanco Holding SA ADR		6,690		152,800
Vale SA ADR		24,100		699,623
Total Brazil common stocks				1,167,450
Canada: 3.00%
Cenovus Energy, Inc.		8,296		210,206
EnCana Corp.		8,300		270,701
Lundin Mining Corp.*		48,800		200,641
Research In Motion Ltd.*		2,900		195,866
Teck Resources Ltd., Class B*		5,600		197,153
Toronto-Dominion Bank		4,100		258,580
TransCanada Corp.1		8,000		276,827
Total Canada common stocks				1,609,974
Cayman Islands: 0.55%
Subsea 7, Inc.*1		17,600		292,753
China: 5.95%
Belle International Holdings Ltd.		241,000		278,389
China Construction Bank Corp., H Shares		360,000		306,426
China Life Insurance Co., Ltd., H Shares		81,000		396,360

	Shares		Value
China Mengniu Dairy Co., Ltd.*		92,000	$	327,144
China Merchants Bank Co., Ltd., H Shares		159,800		414,553
China Overseas Land & Investment Ltd.		134,000		280,578
China Resources Land Ltd.		44,000		99,046
Industrial & Commercial Bank of China, H Shares		135,000		110,789
New World Development Ltd.		167,000		340,839
Shangri-La Asia Ltd.		72,000		134,675
Shougang Concord International Enterprises Co., Ltd.*		274,000		67,944
Sino Land Co., Ltd.		58,000		111,972
Sun Hung Kai Properties Ltd.		7,000		103,869
Tencent Holdings Ltd.		10,100		217,679
Total China common stocks				3,190,263
Cyprus: 0.13%
Marfin Popular Bank Public Co., Ltd.		21,740		70,167
Czech Republic: 0.46%
CEZ AS		5,278		247,594
Denmark: 0.79%
FLSmidth & Co. A/S		2,741		191,954
Novo Nordisk A/S, Class B		1,619		103,588
Vestas Wind Systems A/S*		2,051		125,495
Total Denmark common stocks				421,037
Finland: 0.55%
Sampo Oyj, Class A		12,247		297,230
France: 5.40%
Alstom SA		1,757		122,074
AXA SA		7,396		174,917
BNP Paribas		10,923		861,973
Cie de Saint-Gobain		4,251		228,184
Compagnie Generale des Etablissements Michelin, Class B		2,525		193,681
Nexans SA		2,338		184,540
Sanofi-Aventis SA		1,954		153,168
Soitec NPV*1		15,390		214,976
Total SA		7,028		450,365
Total SA ADR		1,200		76,848
Vallourec SA		1,280		232,814
Total France common stocks				2,893,540

17

UBS International Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Germany: 6.40%
Bayer AG		5,895	$	471,159
Daimler AG		14,667		783,614
E.ON AG		16,315		681,113
GEA Group AG		8,190		182,341
HeidelbergCement AG		6,524		448,758
MAN SE		2,728		212,465
Metro AG		9,039		550,956
United Internet AG*		7,513		99,356
Total Germany common stocks				3,429,762
Greece: 0.07%
National Bank of Greece SA*		1,578		40,238
India: 1.34%
ICICI Bank Ltd. ADR		7,100		267,741
Infosys Technology Ltd. ADR1		8,200		453,214
Total India common stocks				720,955
Indonesia: 1.51%
Astra International Tbk PT		77,000		282,852
Bank Rakyat Indonesia PT		381,500		308,259
Bumi Resources Tbk PT		848,000		218,969
Total Indonesia common stocks				810,080
Ireland: 1.07%
CRH PLC		12,938		350,460
Ryanair Holdings PLC ADR*		8,300		222,606
Total Ireland common stocks				573,066
Israel: 0.59%
Teva Pharmaceutical Industries Ltd.		5,625		316,218
Italy: 0.64%
Intesa Sanpaolo SpA*		19,824		88,824
Saipem SpA		7,419		254,863
Total Italy common stocks				343,687
Japan: 15.41%
Advantest Corp.		14,800		384,523
Asahi Glass Co., Ltd.		26,000		243,564
Canon, Inc.		15,900		672,173
Chuo Mitsui Trust Holdings, Inc.		63,000		210,266
Fanuc Ltd.		2,400		223,165
Ibiden Co., Ltd.		2,400		85,473
Japan Tobacco, Inc.		172		580,355
JTEKT Corp.		12,100		154,625
Komatsu Ltd.		11,300		235,583
Mitsubishi Corp.		37,700		937,329
Mitsui Fudosan Co., Ltd.		11,000		184,721
Mitsui OSK Lines Ltd.		48,000		251,967

	Shares		Value
Nissan Motor Co., Ltd.*		48,800	$	426,512
Nomura Holdings, Inc.		101,200		745,801
NTT DoCoMo, Inc.		168		234,027
ORIX Corp.		4,780		325,067
Ricoh Co., Ltd.		21,000		296,185
Shin-Etsu Chemical Co., Ltd.		8,600		484,743
Sumco Corp.		10,200		179,409
Sumitomo Mitsui Financial Group, Inc.		8,700		248,033
THK Co., Ltd.		17,800		314,421
Tokyu Land Corp.		44,000		161,517
Toshiba Corp.*		27,000		148,904
Toyoda Gosei Co., Ltd.		6,800		204,640
Toyota Motor Corp.		7,900		331,925
Total Japan common stocks				8,264,928
Luxembourg: 0.95%
ArcelorMittal		9,519		431,734
Evraz Group SA GDR*2		2,814		78,289
Total Luxembourg common stocks				510,023
Mexico: 0.59%
Grupo Financiero Banorte SAB de CV, Class O		86,000		314,496
Netherlands: 5.24%
ASML Holding NV		17,445		593,356
Heineken NV		6,356		301,170
ING Groep NV CVA*		47,942		463,464
James Hardie Industries NV CDI*		31,971		241,060
Koninklijke Philips Electronics NV1		7,800		229,632
New World Resources NV, Class A		11,256		99,670
Royal Dutch Shell PLC, Class A		22,500		680,578
STMicroelectronics NV1		22,307		200,210
Total Netherlands common stocks				2,809,140
Norway: 1.71%
Petroleum Geo-Services ASA*		26,000		295,250
Telenor ASA*		44,200		619,982
Total Norway common stocks				915,232
Russia: 3.13%
Gazprom OAO ADR		27,432		683,813
Mobile Telesystems OJSC ADR		5,600		273,784
Novolipetsk Steel OJSC GDR*2		9,246		278,537
Sberbank		1,571		443,401
Total Russia common stocks				1,679,535

18

UBS International Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Singapore: 1.57%
CapitaLand Ltd.		63,500	$	188,085
DBS Group Holdings Ltd.		27,000		293,568
Golden Agri-Resources Ltd.*		274,000		98,654
Olam International Ltd.1		140,000		262,189
Total Singapore common stocks				842,496
South Africa: 1.73%
MTN Group Ltd.		20,581		327,430
Naspers Ltd., Class N		14,837		602,102
Total South Africa common stocks				929,532
South Korea: 0.41%
KB Financial Group, Inc.*		4,351		221,958
Spain: 2.19%
Banco Santander SA		20,334		334,085
Gestevision Telecinco SA1		11,291		164,807
Iberdrola SA		9,356		89,064
Inditex SA		3,342		207,083
Telefonica SA		13,606		379,220
Total Spain common stocks				1,174,259
Switzerland: 6.85%
Alcon, Inc.		1,200		197,220
Credit Suisse Group AG		3,753		184,839
Julius Baer Holding AG		4,796		58,360
Nestle SA		8,814		428,209
Nobel Biocare Holding AG		13,026		435,952
Roche Holding AG		5,786		984,292
SGS SA		298		388,039
Swatch Group AG		5,684		271,781
Xstrata PLC*		25,703		452,725
Zurich Financial Services AG		1,259		273,740
Total Switzerland common stocks				3,675,157
Taiwan: 1.77%
Advanced Semiconductor Engineering, Inc.		384,000		343,511
HON HAI Precision Industry Co., Ltd.		128,450		604,255
Total Taiwan common stocks				947,766
Thailand: 0.70%
Kasikornbank PCL		145,100		377,909
United Kingdom: 17.51%
Anglo American PLC*		6,396		276,811
Antofagasta PLC		15,060		238,790
Associated British Foods PLC		24,036		318,972
AstraZeneca PLC		3,313		155,668

	Shares		Value
Autonomy Corp. PLC*		8,432	$	205,589
Barclays PLC		108,655		478,807
BG Group PLC		19,401		347,429
BP PLC		41,709		403,375
Cobham PLC		61,558		248,133
GlaxoSmithKline PLC		30,769		651,785
Home Retail Group PLC		57,551		262,341
HSBC Holdings PLC		36,469		416,196
Imperial Tobacco Group PLC		13,146		414,299
John Wood Group PLC		14,178		70,038
Kingfisher PLC		48,399		177,416
Man Group PLC		80,514		396,054
Prudential PLC		38,191		389,054
Reckitt Benckiser Group PLC		4,784		259,187
Rio Tinto PLC		14,563		784,892
Sage Group PLC		118,047		419,098
Scottish & Southern Energy PLC		20,611		385,163
Standard Chartered PLC		13,294		332,916
Taylor Wimpey PLC*		117,078		73,417
Tullow Oil PLC		27,216		567,560
Vodafone Group PLC		394,592		913,756
Wolseley PLC*		10,315		206,352
Total United Kingdom common stocks				9,393,098
Total common stocks
(cost $35,228,794)				52,646,014
Short-term investment: 0.01%
Investment company: 0.01%
UBS Cash Management Prime Relationship Fund, 0.120%3,4 (cost $4,208)		4,208		4,208
Investment of cash collateral from securities loaned: 2.49%
UBS Private Money Market Fund LLC, 0.134%3,4 (cost $1,336,894)		1,336,894		1,336,894
Total investments: 100.66%
(cost $36,569,896)				53,987,116
Liabilities, in excess of cash and other assets: (0.66)%				(356,538	)
Net assets: 100.00%			$	53,630,578

19

UBS International Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $36,569,896; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	17,776,003
Gross unrealized depreciation		(358,783	)
Net unrealized appreciation of investments	$	17,417,220

*  Non-income producing security.

¹  Security, or portion thereof, was on loan at December 31, 2009.

²  Security exempt from registration under Regulation S of the Securities Act of 1933. Regulation S applies to securities offerings that are made outside of the United States and do not involve direct selling efforts in the United States. At December 31, 2009, the value of these securities amounted to $356,826 or 0.67% of net assets.

³  Investment in affiliated investment company.

⁴  The rate shown reflects the yield at December 31, 2009.

ADR  American depositary receipt

CDI  Chess depositary interest

CVA  Dutch certification - depositary certificate

GDR  Global depositary receipt

OJSC  Open joint stock company

Forward foreign currency contracts

UBS International Equity Fund had the following open forward foreign currency contracts as of December 31, 2009:

	Contracts to deliver		In exchange for		Maturity dates	Unrealized appreciation/ (depreciation)
Australian Dollar		320,000	USD	286,058	03/03/10	$	262
Brazilian Real		1,530,000	USD	866,218	03/03/10		(2,580	)
Canadian Dollar		600,000	USD	561,729	03/03/10		(11,967	)
Czech Koruna		7,530,000	USD	436,142	03/03/10		26,750
Euro		1,950,000	USD	2,933,730	03/03/10		138,483
Great Britain Pound		760,000	USD	1,256,359	03/03/10		29,164
Israeli Shekel		1,985,000	USD	528,600	03/03/10		4,628
Japanese Yen		30,200,000	USD	326,416	01/06/10		2,154
Japanese Yen		107,800,000	USD	1,228,179	03/03/10		70,396
New Taiwan Dollar		43,300,000	USD	1,358,644	03/03/10		(17,118	)
Norwegian Krone		5,120,000	USD	913,824	03/03/10		31,753
South African Rand		500,000	USD	67,811	01/07/10		87
South African Rand		5,750,000	USD	765,829	03/03/10		(4,977	)
Swiss Franc		345,000	USD	328,951	03/03/10		(4,654	)
Thai Baht		14,040,000	USD	423,210	03/03/10		2,154
United States Dollar		1,016,655	AUD	1,105,000	03/03/10		(29,769	)
United States Dollar		2,369,577	CAD	2,485,000	03/03/10		6,480
United States Dollar		344,941	CHF	345,000	03/03/10		(11,337	)
United States Dollar		378,341	DKK	1,870,000	03/03/10		(18,337	)
United States Dollar		1,020,253	EUR	685,000	03/03/10		(38,332	)
United States Dollar		248,639	GBP	150,000	03/03/10		(6,429	)
United States Dollar		601,446	GBP	375,000	03/03/10		4,078
United States Dollar		2,891,643	JPY	253,600,000	03/03/10		(167,954	)
United States Dollar		250,252	NOK	1,470,000	03/03/10		2,999
United States Dollar		964,534	SEK	6,610,000	03/03/10		(40,378	)
United States Dollar		383,580	SGD	530,000	03/03/10		(6,570	)
United States Dollar		403,693	TWD	12,900,000	03/03/10		6,177
Net unrealized depreciation on forward foreign currency contracts						$	(34,837	)

20

UBS International Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

Currency type abbreviations:

AUD  Australian Dollar

CAD  Canadian Dollar

CHF  Swiss Franc

DKK  Danish Krone

EUR  Euro

GBP  Great Britain Pound

JPY  Japanese Yen

NOK  Norwegian Krone

SEK  Swedish Krona

SGD  Singapore Dollar

TWD  New Taiwan Dollar

USD  United States Dollar

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)			Unobservable inputs (Level 3)		Total
Common stocks1	$	4,999,801	$	47,646,213		$	—	$	52,646,014
Short-term investment		—		4,208			—		4,208
Investment of cash collateral from securities loaned		—		1,336,894			—		1,336,894
Other financial instruments2		—		(34,837	)		—		(34,837	)
Total	$	4,999,801	$	48,952,478		$	—	$	53,952,279

¹  The Fund may hold investments which have been fair valued in accordance with the Fund's fair valuation policy as of December 31, 2009, which may result in movement between Level 1 and Level 2.

²  Other financial instruments may include open futures contracts, swap agreements, options and forward foreign currency contracts.

Level 3 Rollforward Disclosure

The following is a rollforward of the Fund's investments that were valued using unobservable inputs for the period:

Measurements using unobservable inputs (Level 3)
	Rights			Warrants		Total
Assets
Beginning balance	$	24,445		$	0	$	24,445
Total gains or losses (realized/unrealized) included in earnings		—			—		—
Purchases, sales, issuances, and settlements (net)		—			—		—
Transfers in and/or out of Level 3		(24,445	)		—		(24,445	)
Ending balance	$	—		$	—	$	—
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to investments still held at 12/31/09	$	—		$	—	$	—

See accompanying notes to financial statements.
21

UBS U.S. Equity Alpha Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS U.S. Equity Alpha Fund (the "Fund") returned 25.52% (Class A shares returned 18.56% after the deduction of the maximum sales charge), while Class Y shares returned 25.71%. The Fund's benchmark, the Russell 1000 Index (the "Index"), returned 23.11% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 25; please note that the Fund's returns do not reflect the deduction of taxes that an investor would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund's outperformance was due primarily to stock selection.

Portfolio performance summary¹

What worked

•  Strong stock selection drove the Fund's outperformance. The US equity market staged a dramatic recovery from its March 2009 lows. Many market participants were overly focused on economic conditions at the time, which caused them to miss the early phase of the market recovery. Adherence to our investment process led to strong stock selection across many industry groups during the period, and was the primary driver of the Fund's significant outperformance.

  – Notably, the decision to underweight Exxon Mobil made a positive contribution to relative returns. Our research indicated that this stock was overpriced, as so many "safe haven" names were in early 2009. We could not purchase it and remain true to our discipline. When Exxon Mobil lagged the market, our conviction was rewarded. (For details, see "Portfolio highlights.")

  – Peabody Energy was another top performer for the Fund. As the economy stabilized, Peabody and other coal stocks rallied during 2009.

•  An overweight to the transportation sector, and stock selection within the sector, were both positive for performance. The airline and air freight industries offered some of the best price-to-intrinsic-value opportunities, in our view, during the period.

  – FedEx and Southwest Airlines were two of the Fund's strongest names for the six months. (For details, see "Portfolio highlights.")

•  The Fund's information technology holdings contributed to returns, as well. We are finding opportunities in semiconductor equipment more than in software and services stocks. The semiconductor market is extremely cyclical, with a strong tendency to revert to the mean. Our research points to the start of a new cycle for semiconductor stocks.

  – Shares of VMware, a maker of virtualization software, rose during the period, as did semiconductor equipment companies Marvell Technology and Seagate Technology. (For details, see "Portfolio highlights.")

•  The Fund's overweight to media stocks, such as Comcast Corp. and Omnicom Group, was additive to performance during the six months.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

22

UBS U.S. Equity Alpha Fund

•  Short positions in several consumer staples names positively impacted returns during the reporting period. The "safe haven" stocks underperformed as the market rallied starting in March, and the Fund's underweighting to consumer staples was rewarded when this sector lagged.

  – Short positions in Tyson Foods and McDonald's added value during the six months, as did short positions to Northern Trust and Quest Diagnostics.

What didn't work

•  Several industry weights detracted from relative returns.

  – The Fund was underweight to real estate stocks, which recovered strongly in 2009. However, we continue to believe foreclosures and mortgage delinquencies remain problematic for both commercial and residential real estate.

  – Underweights to technology hardware and retail stocks were negative contributors during the six months.

•  Individual stock selection decisions hindered performance for the period. Names such as Sprint Nextel, Exelon and Genzyme detracted from relative returns. While we sold out of Sprint Nextel at the end of the period, we continue to have confidence in our view that Exelon will have an advantage when a cap and trade syste m is imposed. (A cap-and-trade system is a market-based approach to controlling pollution, which allows corporations or national governments to trade emissions allowances under an overall cap, or limit, on those emissions.) Finally, we believe Genzyme can resolve its manufacturing difficulties and realize its potential, so we continue to hold the stock. (For details, see "Portfolio highlights.")

•  The Fund was short to several cyclical stocks that outperformed during the recovery. These included Stanley Works, Cummins and Ingersoll Rand.

Portfolio highlights

•  Holding an underweight position in Exxon Mobil added to relative performance over the review period, as the security underperformed other energy sector stocks. The company announced the acquisition of XTO Energy on December 14, 2009. Exxon's diversification away from traditional oil operations is a clear signal that challenges lie ahead for the largest oil companies. In the future, accessing oil deposits and dealing with stifling politics will, in our view, be difficult to manage. We believe Exxon's move validates our thesis as companies search for friendlier alternatives.

•  During the period, the Fund benefited from holding Southwest Airlines. The low-cost carrier's strategy of eschewing fees for baggage handling and other amenities has boosted revenue by nearly $800 million annually. We continue to hold this stock.

23

UBS U.S. Equity Alpha Fund

•  The Fund sold out of its position in Sprint Nextel. We had a thesis that the management team would be able to improve operations, stem the loss of subscribers, streamline the cost structure and ultimately return to positive growth. We have seen fairly good progress on several of these fronts as Sprint has improved operations and reduced expenses. We thought these initiatives would improve customer satisfaction and reduce customer churn. Unfortunately, the company continues to lose subscribers at a high rate.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

24

UBS U.S. Equity Alpha Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			Inception1
Before deducting maximum sales charge
Class A2		25.52	%		35.85	%		(4.58	)%
Class C3		24.96	%		34.82	%		(5.29	)%
Class Y4		25.71	%		36.55	%		(4.32	)%
After deducting maximum sales charge
Class A2		18.56	%		28.36	%		(6.21	)%
Class C2		23.96	%		33.82	%		(5.29	)%
Russell 1000 Index5		23.11	%		28.43	%		(2.98	)%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—2.49% and 2.26%; Class C—3.32% and 3.01%; Class Y—2.35% and 2.27%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding interest expense, securities loan fees and dividend expense for securities sold short and expenses incurred through investment in other investment companies) to the extent necessary so that the Fund's expenses (excluding interest expense, securities loan fees and dividend expense for securities sold short and expenses incurred through investment in other i nvestment companies), through the fiscal year ending June 30, 2010, otherwise do not exceed 1.50% for Class A shares, 2.25% for Class C shares and 1.25% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund.

¹  Inception date of UBS U.S. Equity Alpha Fund Class A, Class C and Class Y shares and the index is September 26, 2006.

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁴  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁵  The Russell 1000 Index measures the performance of the 1,000 largest companies in the Russell 3000 Index, and represents approximately 90% of the total market capitalization of the Russell 3000 Index. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

25

UBS U.S. Equity Alpha Fund

Top ten equity holdings (unaudited)*¹

As of December 31, 2009

	Percentage of net assets
Covidien PLC		3.3	%
Exxon Mobil Corp.		3.2
Microsoft Corp.		3.0
Hewlett-Packard Co.		2.7
JPMorgan Chase & Co.		2.7
Procter & Gamble Co.		2.7
Comcast Corp., Class A		2.7
PepsiCo, Inc.		2.7
AT&T, Inc.		2.5
Wells Fargo & Co.		2.4
Total		27.9	%

*  Only long positions are considered for top ten holdings.

¹  Figures represent the direct investments of the UBS U.S. Equity Alpha Fund. Figures could be different if a breakdown of the underlying investment company was included.

26

UBS U.S. Equity Alpha Fund

Industry diversification (unaudited)¹

As a percentage of net assets as of December 31, 2009

Common stocks

Aerospace & defense	2.89	%
Air freight & logistics	2.28
Airlines	2.32
Auto components	1.02
Beverages	3.87
Biotechnology	2.02
Capital markets	3.02
Chemicals	2.20
Commercial banks	3.43
Communications equipment	1.05
Computers & peripherals	6.03
Consumer finance	1.23
Containers & packaging	0.66
Diversified financial services	4.00
Diversified telecommunication services	2.51
Electric utilities	6.63
Electronic equipment, instruments & components	0.72
Energy equipment & services	2.68
Food & staples retailing	4.01
Health care equipment & supplies	6.55
Health care providers & services	3.14
Hotels, restaurants & leisure	1.34
Household durables	1.25
Household products	2.68
Independent power producers & energy traders	0.12
Insurance	4.09
Life sciences tools & services	1.17
Machinery	5.28
Media	7.61
Multi-utilities	1.73
Oil, gas & consumable fuels	10.53
Personal products	2.03
Pharmaceuticals	6.08
Road & rail	1.37
Semiconductors & semiconductor equipment	4.99
Software	6.44
Specialty retail	1.64
Total common stocks	120.61	%

Investment company

SPDR Trust	3.01	%
Short-term investment	0.24
Total investments before investments sold short	123.86	%

Investments sold short

Common stocks

Aerospace & defense	(0.71	)
Beverages	(0.66	)
Capital markets	(1.07	)
Computers & peripherals	(0.69	)
Diversified telecommunication services	(0.57	)
Electronic equipment, instruments & components	(1.35	)
Food products	(1.64	)
Health care equipment & supplies	(0.88	)
Health care providers & services	(2.06	)
Insurance	(0.66	)
Internet & catalog retail	(0.62	)
Internet software & services	(0.63	)
Machinery	(2.10	)
Media	(0.57	)
Multi-utilities	(1.71	)
Oil, gas & consumable fuels	(0.67	)
Pharmaceuticals	(1.48	)
Semiconductors & semiconductor equipment	(0.56	)
Software	(0.78	)
Specialty retail	(2.15	)
Thrifts & mortgage finance	(0.56	)
Trading companies & distributors	(0.55	)
Water utilities	(1.09	)
Total investments sold short	(23.76	)%
Total investments, net of investments sold short	100.10
Liabilities, in excess of cash and other assets	(0.10	)
Net assets	100.00	%

¹  Figures represent the industry breakdown of direct investments of the UBS U.S. Equity Alpha Fund. Figures would be different if a breakdown of the underlying investment company's industry diversification was included.

27

UBS U.S. Equity Alpha Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 120.61%
Aerospace & defense: 2.89%
General Dynamics Corp.1		23,700	$	1,615,629
Raytheon Co.		10,200		525,504
				2,141,133
Air freight & logistics: 2.28%
FedEx Corp.1		20,200		1,685,690
Airlines: 2.32%
Southwest Airlines Co.1		150,300		1,717,929
Auto components: 1.02%
BorgWarner, Inc.1		22,800		757,416
Beverages: 3.87%
Dr. Pepper Snapple Group, Inc.1		32,200		911,260
PepsiCo, Inc.1		32,200		1,957,760
				2,869,020
Biotechnology: 2.02%
Amgen, Inc.*1		19,800		1,120,086
Genzyme Corp.*1		7,700		377,377
				1,497,463
Capital markets: 3.02%
Bank of New York Mellon Corp.1		44,506		1,244,833
Morgan Stanley1		33,500		991,600
				2,236,433
Chemicals: 2.20%
EI Du Pont de Nemours & Co.1		19,700		663,299
Monsanto Co.1		11,800		964,650
				1,627,949
Commercial banks: 3.43%
City National Corp.1		16,600		756,960
Wells Fargo & Co.1		66,000		1,781,340
				2,538,300
Communications equipment: 1.05%
QUALCOMM, Inc.1		16,800		777,168
Computers & peripherals: 6.03%
Apple, Inc.*1		8,100		1,707,966
Hewlett-Packard Co.1		39,200		2,019,192
Seagate Technology1		40,400		734,876
				4,462,034

	Shares		Value
Consumer finance: 1.23%
Discover Financial Services1		62,050	$	912,756
Containers & packaging: 0.66%
Ball Corp.1		9,400		485,980
Diversified financial services: 4.00%
Bank of America Corp.1		64,500		971,370
JPMorgan Chase & Co.1		47,700		1,987,659
				2,959,029
Diversified telecommunication services: 2.51%
AT&T, Inc.1		66,400		1,861,192
Electric utilities: 6.63%
American Electric Power Co., Inc.1		40,800		1,419,432
Exelon Corp.1		34,800		1,700,676
FirstEnergy Corp.1		19,900		924,355
Pepco Holdings, Inc.1		51,500		867,775
				4,912,238
Electronic equipment, instruments & components: 0.72%
Arrow Electronics, Inc.*		17,900		530,019
Energy equipment & services: 2.68%
Baker Hughes, Inc.1		29,700		1,202,256
Noble Corp.1		19,200		781,440
				1,983,696
Food & staples retailing: 4.01%
Kroger Co.1		44,700		917,691
Sysco Corp.1		25,100		701,294
Wal-Mart Stores, Inc.1		25,300		1,352,285
				2,971,270
Health care equipment & supplies: 6.55%
Covidien PLC1		50,500		2,418,445
Medtronic, Inc.1		38,800		1,706,424
Zimmer Holdings, Inc.*1		12,300		727,053
				4,851,922
Health care providers & services: 3.14%
Medco Health Solutions, Inc.*1		15,800		1,009,778
UnitedHealth Group, Inc.1		43,200		1,316,736
				2,326,514
Hotels, restaurants & leisure: 1.34%
Carnival Corp.*1		31,200		988,728

28

UBS U.S. Equity Alpha Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Household durables: 1.25%
Fortune Brands, Inc.1		21,400	$	924,480
Household products: 2.68%
Procter & Gamble Co.1		32,700		1,982,601
Independent power producers & energy traders: 0.12%
Dynegy, Inc., Class A*1		50,800		91,948
Insurance: 4.09%
ACE Ltd.*1		14,200		715,680
Aflac, Inc.1		28,900		1,336,625
Principal Financial Group, Inc.1		40,600		976,024
				3,028,329
Life sciences tools & services: 1.17%
Millipore Corp.*1		4,800		347,280
Waters Corp.*1		8,400		520,464
				867,744
Machinery: 5.28%
Illinois Tool Works, Inc.1		30,200		1,449,298
PACCAR, Inc.1		38,600		1,400,022
Pall Corp.1		29,300		1,060,660
				3,909,980
Media: 7.61%
Comcast Corp., Class A1		117,200		1,975,992
Interpublic Group of Cos., Inc.*1		104,945		774,494
Omnicom Group, Inc.1		31,900		1,248,885
Time Warner, Inc.1		28,100		818,834
Viacom, Inc., Class B*1		27,500		817,575
				5,635,780
Multi-utilities: 1.73%
MDU Resources Group, Inc.1		30,200		712,720
Sempra Energy1		10,100		565,398
				1,278,118
Oil, gas & consumable fuels: 10.53%
EOG Resources, Inc.1		9,600		934,080
Exxon Mobil Corp.1		34,600		2,359,374
Hess Corp.1		16,200		980,100
Marathon Oil Corp.1		34,800		1,086,456
Peabody Energy Corp.1		14,300		646,503
Ultra Petroleum Corp.*1		19,100		952,326
Williams Cos., Inc.1		39,900		841,092
				7,799,931

	Shares		Value
Personal products: 2.03%
Avon Products, Inc.1		21,400	$	674,100
Estee Lauder Cos., Inc., Class A1		17,200		831,792
				1,505,892
Pharmaceuticals: 6.08%
Allergan, Inc.1		19,000		1,197,190
Merck & Co., Inc.1		42,700		1,560,258
Pfizer, Inc.1		95,700		1,740,783
				4,498,231
Road & rail: 1.37%
Ryder System, Inc.1		24,700		1,016,899
Semiconductors & semiconductor equipment: 4.99%
Applied Materials, Inc.		68,000		947,920
Broadcom Corp., Class A*1		26,600		836,570
Intersil Corp., Class A1		46,800		717,912
Marvell Technology Group Ltd.*1		24,900		516,675
National Semiconductor Corp.1		43,800		672,768
				3,691,845
Software: 6.44%
Autodesk, Inc.*1		33,500		851,235
Intuit, Inc.*1		20,900		641,839
Microsoft Corp.1		74,300		2,265,407
VMware, Inc., Class A*1		23,800		1,008,644
				4,767,125
Specialty retail: 1.64%
Lowe's Cos., Inc.1		52,000		1,216,280
Total common stocks
(cost $73,139,779)				89,309,062
Investment company: 3.01%
SPDR Trust, Series 1 (cost $2,246,612)		20,000		2,228,800
Short-term investment: 0.24%
Investment company: 0.24%
UBS Cash Management Prime Relationship Fund, 0.120%2,3 (cost $177,546)		177,546		177,546
Total investments before investments
sold short: 123.86%
(cost $75,563,937)				91,715,408

29

UBS U.S. Equity Alpha Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares			Value
Investments sold short: (23.76)%
Common stocks: (23.76)%
Aerospace & defense: (0.71)%
Goodrich Corp.		(8,200	)	$	(526,850	)
Beverages: (0.66)%
Coca-Cola Enterprises, Inc.		(23,200	)		(491,840	)
Capital markets: (1.07)%
Charles Schwab Corp.		(22,100	)		(415,922	)
Northern Trust Corp.		(7,200	)		(377,280	)
					(793,202	)
Computers & peripherals: (0.69)%
EMC Corp.		(14,400	)		(251,568	)
NetApp, Inc.		(7,500	)		(257,925	)
					(509,493	)
Diversified telecommunication services: (0.57)%
Qwest Communications International, Inc.		(100,500	)		(423,105	)
Electronic equipment, instruments & components: (1.35)%
Avnet, Inc.		(17,100	)		(515,736	)
Corning, Inc.		(25,100	)		(484,681	)
					(1,000,417	)
Food products: (1.64)%
General Mills, Inc.		(7,000	)		(495,670	)
Kellogg Co.		(6,400	)		(340,480	)
Tyson Foods, Inc., Class A		(30,800	)		(377,916	)
					(1,214,066	)
Health care equipment & supplies: (0.88)%
Beckman Coulter, Inc.		(4,900	)		(320,656	)
Intuitive Surgical, Inc.		(1,100	)		(333,652	)
					(654,308	)
Health care providers & services: (2.06)%
Amedisys, Inc.		(11,400	)		(553,584	)
Express Scripts, Inc.		(6,900	)		(596,505	)
Genoptix, Inc.		(10,464	)		(371,786	)
					(1,521,875	)
Insurance: (0.66)%
Travelers Cos., Inc.		(9,800	)		(488,628	)

	Shares			Value
Internet & catalog retail: (0.62)%
NetFlix, Inc.		(8,300	)	$	(457,662	)
Internet software & services: (0.63)%
Akamai Technologies, Inc.		(18,300	)		(463,539	)
Machinery: (2.10)%
Cummins, Inc.		(9,700	)		(444,842	)
Ingersoll-Rand PLC		(15,300	)		(546,822	)
Stanley Works		(10,900	)		(561,459	)
					(1,553,123	)
Media: (0.57)%
Lamar Advertising Co., Class A		(13,600	)		(422,824	)
Multi-utilities: (1.71)%
Consolidated Edison, Inc.		(12,000	)		(545,160	)
Integrys Energy Group, Inc.		(10,100	)		(424,099	)
NSTAR		(8,100	)		(298,080	)
					(1,267,339	)
Oil, gas & consumable fuels: (0.67)%
Occidental Petroleum Corp.		(6,100	)		(496,235	)
Pharmaceuticals: (1.48)%
Eli Lilly & Co.		(16,200	)		(578,502	)
Watson Pharmaceuticals, Inc.		(13,000	)		(514,930	)
					(1,093,432	)
Semiconductors & semiconductor equipment: (0.56)%
Novellus Systems, Inc.		(17,800	)		(415,452	)
Software: (0.78)%
BMC Software, Inc.		(14,400	)		(577,440	)
Specialty retail: (2.15)%
AutoZone, Inc.		(1,500	)		(237,105	)
Best Buy Co., Inc.		(11,800	)		(465,628	)
O'Reilly Automotive, Inc.		(9,800	)		(373,576	)
Sherwin-Williams Co.		(8,400	)		(517,860	)
					(1,594,169	)
Thrifts & mortgage finance: (0.56)%
Hudson City Bancorp, Inc.		(30,300	)		(416,019	)
Trading companies & distributors: (0.55)%
WW Grainger, Inc.		(4,200	)		(406,686	)

30

UBS U.S. Equity Alpha Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

	Shares			Value
Water utilities: (1.09)%
American Water Works Co., Inc.		(19,200	)	$	(430,272	)
Aqua America, Inc.		(21,600	)		(378,216	)
					(808,488	)
Total investments sold short
(proceeds $15,122,697)					(17,596,192	)
Total investments, net of investments sold short: 100.10%					74,119,216
Liabilities, in excess of cash and other assets: (0.10)%					(74,369	)
Net assets: 100.00%				$	74,044,847

Notes to portfolio of investments

Aggregate cost for federal income tax purposes before investments sold short, which was substantially the same for book purposes, was $75,563,937; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	16,687,685
Gross unrealized depreciation		(536,214	)
Net unrealized appreciation of investments	$	16,151,471

*  Non-income producing security.

¹  All or a portion of these securities have been delivered to cover open short positions.

²  Investment in affiliated investment company.

³  The rate shown reflects the yield at December 31, 2009.

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)			Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks	$	89,309,062		$	—	$	—	$	89,309,062
Common stocks sold short		(17,596,192	)		—		—		(17,596,192	)
Investment company		2,228,800			—		—		2,228,800
Short-term investment		—			177,546		—		177,546
Total	$	73,941,670		$	177,546	$	—	$	74,119,216

See accompanying notes to financial statements.
31

UBS U.S. Large Cap Equity Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS U.S. Large Cap Equity Fund (the "Fund") returned 23.98% (Class A shares returned 17.14% after the deduction of the maximum sales charge), while Class Y shares returned 24.11%. The Fund's benchmark, the Russell 1000 Index (the "Index"), returned 23.11% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 35; please note that the Fund's returns do not reflect the deduction of taxes that an investor would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund's outperformance was due primarily to stock selection.

Portfolio performance summary¹

What worked

•  Strong stock selection drove the Fund's outperformance. The US equity market staged a dramatic recovery from its March 2009 lows. Many market participants were overly focused on economic conditions at the time, which caused them to miss the early phase of the market recovery. Adherence to our investment process led to strong stock selection across many industry groups during the period, and was the primary driver of the Fund's significant outperformance.

  – The decision to underweight Exxon Mobil made a positive contribution to relative returns. Our research indicated that this stock was overpriced, as so many "safe haven" names were in early 2009. We remained true to our discipline, and chose not to purchase it. When Exxon Mobil lagged the market, our conviction was rewarded. (For details, see "Portfolio highlights.")

  – Peabody Energy was another top performer for the Fund. As the economy stabilized, Peabody and other coal stocks rallied during 2009. (For details, see "Portfolio highlights.")

•  The Fund's information technology holdings contributed to returns during the period. We are finding opportunities in semiconductor equipment more than in software and services stocks. The semiconductor market is extremely cyclical, with a strong tendency to revert to the mean. Our research, however, points to the start of a new cycle for semiconductor stocks.

  – Shares of VMware, a maker of virtualization software, rose during the period, as did semiconductor equipment companies Marvell Technology and Seagate Technology. (For details, see "Portfolio highlights.")

•  Selection within the transportation sector was a positive for performance, as well. The rail and air freight industries offered the best price-to-intrinsic-value opportunities during the period. FedEx and Burlington Northern were two of the Fund's strongest names during the period. (Burlington Northern is no longer held by the Fund; for details on FedEx, see "Portfolio highlights.")

•  Several industry weights were additive to performance during the six months.

  – The Fund was successfully overweight to media stocks, such as Comcast Corp. and Omnicom Group.

  – An underweight to consumer staples was rewarded when many food, beverage and tobacco stocks lagged the market recovery.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

32

UBS U.S. Large Cap Equity Fund

What didn't work

•  Some individual stock selection decisions hindered performance for the period.

  – Names such as Sprint Nextel, Exelon and Genzyme detracted from relative returns. We sold out of Sprint Nextel at the end of the period. We continue to have confidence in Exelon's advantage when a cap and trade system (a market-based approach to controlling pollution) is imposed, and we believe Genzyme can resolve its manufacturing difficulties and realize its potential. As a result, we continue to hold both stocks in the portfolio. (For details, see "Portfolio highl ights.")

•  Several industry weights detracted from relative returns.

  – The Fund was underweight to real estate stocks, which recovered strongly in 2009. We believe foreclosures and mortgage delinquencies remain problematic for both commercial and residential real estate.

  – The Fund had an underweight position in materials stocks, as well. Within commodity-sensitive stocks, we are finding what we view to be more attractive opportunities in energy than in materials. However, the materials sector was up more than we expected during the six-month period.

Portfolio highlights

•  Holding an underweight position in Exxon Mobil added to relative performance over the six months, as the security underperformed other energy sector stocks. The company announced the acquisition of XTO Energy on December 14th. Exxon's diversification away from traditional oil operations is a clear signal that challenges lie ahead for the biggest oil companies. In the future, accessing oil deposits and dealing with stifling politics will be difficult to manage. We believe Exxon's move validates our thesis as companies search for friendlier alternatives.

•  Peabody Energy Corp. added to relative performance, as well. Optimism over the manufacturing recovery appears to be rallying coal stocks, which will boost coal demand. Further to this, we believe that the current competitive structure of the industry continues to improve due to consolidation. In our view, this should force smaller producers to shut down, thereby giving Peabody an edge.

•  The Fund held Marvell Technology Group, which aided performance during the period. The company announced a large jump in quarterly profits as a result of new cost controls and gross margin expansion. In addition, revenues increased sequentially, while operating expenses remained in line. We continue to hold our current position in the company, which makes chips for storage and communications systems. We believe management has positioned the company to further grow profits.

•  FedEx contributed to relative performance during the period. We believe that over time, the company will continue to gain US market share and enjoy sustained revenue growth internationally. We have a strong conviction that the company's superior management will help guide revenue margins and will keep the company ahead of competitors.

33

UBS U.S. Large Cap Equity Fund

•  The Fund sold out of its position in Sprint Nextel. We had a thesis that the management team would be able to improve operations, stem its loss of subscribers, streamline its cost structure and ultimately return to positive growth. In fact, we saw fairly good progress on several of these fronts, as Sprint improved operations and reduced expenses. We believed these initiatives would improve customer satisfaction and reduce customer churn; however, unfortunately the company continues to lose subscribers at a high rate.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

34

UBS U.S. Large Cap Equity Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		23.98	%		31.66	%		(0.42	)%		2.27	%		3.35	%
Class B3		23.53	%		30.69	%		(1.20	)%		N/A			2.53	%6
Class C4		23.51	%		30.67	%		(1.16	)%		N/A			2.01	%
Class Y5		24.11	%		32.07	%		(0.14	)%		2.57	%		7.56	%
After deducting maximum sales charge
Class A2		17.14	%		24.41	%		(1.54	)%		1.70	%		2.88	%
Class B3		18.53	%		25.69	%		(1.54	)%		N/A			2.53	%6
Class C4		22.51	%		29.67	%		(1.16	)%		N/A			2.01	%
Russell 1000 Index7		23.11	%		28.43	%		0.79	%		(0.49	)%		7.73	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.28% and 1.20%; Class B—2.02% and 1.95%; Class C—1.96% and 1.95%; Class Y—0.96% and 0.95%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The net expenses listed above reflect the management fee waiver/expense reimbursements put in place for the fiscal year ending June 30, 2010. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred throug h investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.20% for Class A shares, 1.95% for Class B shares, 1.95% for Class C shares and 0.95% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund. Pursuant to the previous fee waiver and expense reimbursement agreement, the Advisor did not waive its management fee or reimburse expenses of the Fund because each Class' "Total annual fund operating expenses" did not exceed its respective agreed-upon expense limit.

¹   Inception date of UBS U.S. Large Cap Equity Fund Class A shares is June 30, 1997. Inception dates of Class B and Class C shares are November 05, 2001 and November 13, 2001, respectively. Inception date of Class Y shares and the index is February 22, 1994.

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The Russell 1000 Index measures the performance of the 1,000 largest companies in the Russell 3000 Index, and represents approximately 92% of the total market capitalization of the Russell 3000 Index. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

35

UBS U.S. Large Cap Equity Fund

Top ten equity holdings (unaudited)

As of December 31, 2009

	Percentage of net assets
Microsoft Corp.		3.0	%
Covidien PLC		2.8
Apple, Inc.		2.6
JPMorgan Chase & Co.		2.6
Pfizer, Inc.		2.5
Wells Fargo & Co.		2.4
Procter & Gamble Co.		2.4
FedEx Corp.		2.4
Comcast Corp., Class A		2.3
Chevron Corp.		2.1
Total		25.1	%

Industry diversification (unaudited)

As a percentage of net assets as of December 31, 2009

Common stocks

Aerospace & defense	2.14	%
Air freight & logistics	2.35
Airlines	0.88
Auto components	1.02
Beverages	1.99
Biotechnology	1.86
Capital markets	2.30
Chemicals	1.18
Commercial banks	2.91
Communications equipment	1.51
Computers & peripherals	5.63
Consumer finance	1.04
Containers & packaging	0.53
Diversified financial services	3.81
Diversified telecommunication services	1.50
Electric utilities	4.97
Energy equipment & services	2.10
Food & staples retailing	2.29
Health care equipment & supplies	4.81
Health care providers & services	2.41
Hotels, restaurants & leisure	1.34
Household durables	1.47
Household products	2.40
Independent power producers & energy traders	0.22
Insurance	3.63
Life sciences tools & services	0.59
Machinery	4.53
Media	5.63
Oil, gas & consumable fuels	11.09
Personal products	2.01
Pharmaceuticals	5.65
Road & rail	0.86
Semiconductors & semiconductor equipment	3.93
Software	6.24
Specialty retail	0.99
Total common stocks	97.81	%
Short-term investment	2.35
Total investments	100.16	%
Liabilities, in excess of cash and other assets	(0.16	)
Net assets	100.00	%

36

UBS U.S. Large Cap Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 97.81%
Aerospace & defense: 2.14%
General Dynamics Corp.		75,500	$	5,146,835
Air freight & logistics: 2.35%
FedEx Corp.		67,800		5,657,910
Airlines: 0.88%
Southwest Airlines Co.		186,200		2,128,266
Auto components: 1.02%
BorgWarner, Inc.		73,700		2,448,314
Beverages: 1.99%
PepsiCo, Inc.		78,900		4,797,120
Biotechnology: 1.86%
Amgen, Inc.*		49,000		2,771,930
Genzyme Corp.*		34,800		1,705,548
				4,477,478
Capital markets: 2.30%
Bank of New York Mellon Corp.		104,983		2,936,375
Morgan Stanley		88,000		2,604,800
				5,541,175
Chemicals: 1.18%
Monsanto Co.		34,800		2,844,900
Commercial banks: 2.91%
City National Corp.		25,900		1,181,040
Wells Fargo & Co.		215,400		5,813,646
				6,994,686
Communications equipment: 1.51%
QUALCOMM, Inc.		78,500		3,631,410
Computers & peripherals: 5.63%
Apple, Inc.*		29,500		6,220,370
Hewlett-Packard Co.		99,800		5,140,698
Seagate Technology		120,000		2,182,800
				13,543,868
Consumer finance: 1.04%
Discover Financial Services		169,450		2,492,610
Containers & packaging: 0.53%
Ball Corp.		24,700		1,276,990

	Shares		Value
Diversified financial services: 3.81%
Bank of America Corp.		197,500	$	2,974,350
JPMorgan Chase & Co.		148,900		6,204,663
				9,179,013
Diversified telecommunication services: 1.50%
AT&T, Inc.		128,600		3,604,658
Electric utilities: 4.97%
American Electric Power Co., Inc.		113,700		3,955,623
Exelon Corp.		91,800		4,486,266
FirstEnergy Corp.		58,000		2,694,100
Pepco Holdings, Inc.		49,700		837,445
				11,973,434
Energy equipment & services: 2.10%
Baker Hughes, Inc.		80,800		3,270,784
Noble Corp.		43,800		1,782,660
				5,053,444
Food & staples retailing: 2.29%
Sysco Corp.		59,300		1,656,842
Wal-Mart Stores, Inc.		72,100		3,853,745
				5,510,587
Health care equipment & supplies: 4.81%
Covidien PLC		139,700		6,690,233
Medtronic, Inc.		111,400		4,899,372
				11,589,605
Health care providers & services: 2.41%
Medco Health Solutions, Inc.*		28,200		1,802,262
UnitedHealth Group, Inc.		131,200		3,998,976
				5,801,238
Hotels, restaurants & leisure: 1.34%
Carnival Corp.*		101,600		3,219,704
Household durables: 1.47%
Fortune Brands, Inc.		81,700		3,529,440
Household products: 2.40%
Procter & Gamble Co.		95,100		5,765,913
Independent power producers & energy traders: 0.22%
Dynegy, Inc., Class A*		294,100		532,321

37

UBS U.S. Large Cap Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Insurance: 3.63%
ACE Ltd.*		39,800	$	2,005,920
Aflac, Inc.		78,200		3,616,750
Principal Financial Group, Inc.		130,100		3,127,604
				8,750,274
Life sciences tools & services: 0.59%
Millipore Corp.*		19,700		1,425,295
Machinery: 4.53%
Illinois Tool Works, Inc.		95,700		4,592,643
PACCAR, Inc.		107,050		3,882,703
Pall Corp.		67,200		2,432,640
				10,907,986
Media: 5.63%
Comcast Corp., Class A		324,300		5,467,698
Interpublic Group of Cos., Inc.*		322,600		2,380,788
Omnicom Group, Inc.		73,200		2,865,780
Viacom, Inc., Class B*		95,800		2,848,134
				13,562,400
Oil, gas & consumable fuels: 11.09%
Chevron Corp.		67,200		5,173,728
EOG Resources, Inc.		20,000		1,946,000
Exxon Mobil Corp.		63,900		4,357,341
Hess Corp.		49,200		2,976,600
Marathon Oil Corp.		85,800		2,678,676
Peabody Energy Corp.		55,800		2,522,718
Ultra Petroleum Corp.*		70,177		3,499,025
Williams Cos., Inc.		168,100		3,543,548
				26,697,636
Personal products: 2.01%
Avon Products, Inc.		80,700		2,542,050
Estee Lauder Cos., Inc., Class A		47,400		2,292,264
				4,834,314
Pharmaceuticals: 5.65%
Allergan, Inc.		61,200		3,856,212
Merck & Co., Inc.		102,900		3,759,966
Pfizer, Inc.		329,000		5,984,510
				13,600,688
Road & rail: 0.86%
Ryder System, Inc.		50,300		2,070,851

	Shares		Value
Semiconductors & semiconductor equipment: 3.93%
Broadcom Corp., Class A*		90,300	$	2,839,935
Intersil Corp., Class A		78,900		1,210,326
KLA-Tencor Corp.		54,100		1,956,256
Marvell Technology Group Ltd.*		111,800		2,319,850
National Semiconductor Corp.		73,200		1,124,352
				9,450,719
Software: 6.24%
Autodesk, Inc.*		114,300		2,904,363
Intuit, Inc.*		51,900		1,593,849
Microsoft Corp.		233,900		7,131,611
VMware, Inc., Class A*		80,300		3,403,114
				15,032,937
Specialty retail: 0.99%
Lowe's Cos., Inc.		102,100		2,388,119
Total common stocks
(cost $191,498,466)				235,462,138
Short-term investment: 2.35%
Investment company: 2.35%
UBS Cash Management Prime Relationship Fund, 0.120%1,2 (cost $5,662,064)		5,662,064		5,662,064
Total investments: 100.16%
(cost $197,160,530)				241,124,202
Liabilities, in excess of cash and other assets: (0.16)%				(393,921	)
Net assets: 100.00%			$	240,730,281

38

UBS U.S. Large Cap Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $197,160,530; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	49,863,967
Gross unrealized depreciation		(5,900,295	)
Net unrealized appreciation of investments	$	43,963,672

*  Non-income producing security.

¹  Investment in affiliated investment company.

²  The rate shown reflects the yield at December 31, 2009.

Futures contracts

UBS U.S. Large Cap Equity Fund had the following open futures contracts as of December 31, 2009:

	Expiration date	Cost		Value		Unrealized appreciation
Index futures buy contracts:
S&P 500 Index, 10 contracts (USD)	March 2010	$	2,774,385	$	2,776,750	$	2,365

Currency type abbreviations:

USD  United States Dollar

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks	$	235,462,138	$	—	$	—	$	235,462,138
Short-term investment		—		5,662,064		—		5,662,064
Other financial instruments1		2,365		—		—		2,365
Total	$	235,464,503	$	5,662,064	$	—	$	241,126,567

¹  Other financial instruments may include open futures contracts, swap agreements, options and forward foreign currency contracts.

See accompanying notes to financial statements.
39

UBS U.S. Large Cap Value Equity Fund

Portfolio performance

For the six months ended December 31, 2009, Class A shares of UBS U.S. Large Cap Value Equity Fund (the "Fund") returned 21.32% (Class A shares returned 14.59% after the deduction of the maximum sales charge), while Class Y shares returned 21.52%. The Fund's benchmark, the Russell 1000 Value Index (the "Index"), returned 23.23% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 43; please note that the Fund's returns do not reflect the deduction of taxes that an investor would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund's underperformance was due primarily to stock selection.

Portfolio performance summary¹

What worked

•  Several stock positions contributed positively to Fund performance. Though the US equity market staged a dramatic recovery from its March 2009 lows, our investment decisions were based on our comparisons of price to intrinsic value. Many market participants were overly focused on economic conditions at the time, which caused them to miss the early phase of the market recovery.

  – The decision to underweight Exxon Mobil made a positive contribution to relative returns. Our research indicated that this stock was overpriced, as so many "safe haven" names were in early 2009. We could not purchase it and remain true to our discipline. When Exxon Mobil lagged the market, our conviction was rewarded. (For details, see "Portfolio highlights.")

  – The Fund was overweight to Peabody Energy, which was another top contributor. As the economy stabilized, Peabody and other coal stocks rallied during 2009. (For details, see "Portfolio highlights.")

  – Semiconductor equipment company Seagate Technology was a strong performer during the six months. (For details, see "Portfolio highlights.")

•  An overweight to the transportation sector was a positive for performance. The rail and air freight industries offered, in our view, the best price-to-intrinsic-value opportunities during the period. Burlington Northern was one of the Fund's strongest names during the period. Shares of Burlington Northern rose when Warren Buffett acquired the company for his firm Berkshire Hathaway. We sold the stock when it reached what our research showed to be fair value.

•  The Fund was overweight to capital goods stocks. Within this sector, General Electric was a top contributor for the six months.

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

40

UBS U.S. Large Cap Value Equity Fund

What didn't work

•  Several industry weights detracted from relative returns.

  – The Fund was underweight to real estate stocks, which recovered strongly in 2009. We believe foreclosures and mortgage delinquencies remain problematic for both commercial and residential real estate.

  – The Fund had an underweight position in materials stocks, as well. Within commodity-sensitive stocks, our research is finding more attractive opportunities in energy than in materials. However, the materials sector was up more than we expected during the six months.

•  Individual stock selection decisions hindered performance for the period.

  – Names such as Sprint Nextel, Exelon and Marathon Oil detracted from relative returns. We sold out of Sprint Nextel at the end of the period. However, we continue to have confidence in our view that Exelon will have an advantage when a cap and trade system is imposed. (A cap-and-trade system is a market-based approach to controlling pollution, which allows corporations or national governments to trade emissions allowances under an overall cap, or limit, on those emis sions.) And we believe Marathon is well-positioned for increased energy demand, so we continue to hold the stock. (For details, see "Portfolio highlights.")

  – After we purchased Bank of America, investor concerns about the stability of the recovery for financials caused it to lag the market.

Portfolio highlights

•  Holding an underweight position in Exxon Mobil added to relative performance over the review period, as the security underperformed other energy sector stocks. The company announced the acquisition of XTO Energy on December 14, 2009. Exxon's diversification away from traditional oil operations is a clear signal that challenges lie ahead for the largest oil companies. In the future, accessing oil deposits and dealing with stifling politics will, in our view, be difficult to manage. We believe Exxon's move validates our thesis as companies search for friendlier alternatives.

•  The Fund's position in Peabody Energy Corp. added to relative performance. Optimism over the manufacturing recovery appears to be rallying coal stocks, which will boost coal demand. We believe that the current competitive structure of the industry continues to improve due to consolidation. This should force smaller producers to shut down, thereby giving Peabody an edge.

•  FedEx contributed to relative performance during the period. We believe that over time, the company will continue to gain US market share and enjoy sustained revenue growth internationally. We have a strong conviction that the company's superior management will help guide revenue margins and will keep the company ahead of competitors.

•  The Fund sold out of its position in Sprint Nextel. We had a thesis that the management team would be able to improve operations, stem the loss of subscribers, streamline the cost structure and ultimately return to positive growth. We have seen fairly good progress on several of these fronts as Sprint has improved operations and reduced expenses. We thought these initiatives would improve customer satisfaction and reduce customer churn. Unfortunately, the company continues to lose subscribers at a high rate.

41

UBS U.S. Large Cap Value Equity Fund

•  The Fund's position in Marathon Oil detracted from performance during the period. Investors moved shares lower after pricing in reduced crude oil and refining margin forecasts. However, we expect that Marathon's growing reserves will generate significant revenues as global energy demand increases.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

42

UBS U.S. Large Cap Value Equity Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 month			1 year			5 years			Inception1
Before deducting maximum sales charge
Class A2		21.32	%		22.56	%		(0.97	)%		2.23	%
Class B3		20.74	%		21.74	%		(1.71	)%		2.07	%6
Class C4		20.83	%		21.84	%		(1.69	)%		1.78	%
Class Y5		21.52	%		23.00	%		(0.70	)%		2.32	%
After deducting maximum sales charge
Class A2		14.59	%		15.92	%		(2.09	)%		1.51	%
Class B3		15.74	%		16.74	%		(1.96	)%		2.07	%6
Class C4		19.83	%		20.84	%		(1.69	)%		1.78	%
Russell 1000 Value Index7		23.23	%		19.69	%		(0.25	)%		2.25	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.53% and 1.21%; Class B—2.49% and 1.96%; Class C—2.34% and 1.96%; Class Y—1.46% and 0.96%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The net expenses listed above reflect the management fee waiver/expense reimbursements put in place for the fiscal year ending June 30, 2010. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred throug h investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.20% for Class A shares, 1.95% for Class B shares, 1.95% for Class C shares and 0.95% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund. Pursuant to the previous fee waiver and expense reimbursement agreement, the actual "Net expenses" (including Acquired fund fees and expenses) for the fiscal year ending June 30, 2009 were 1.11% for the Class A shares, 1.86% for the Class B shares, 1.86% for the Class C shares and 0.86% for the Class Y shares.

¹  Inception dates of UBS U.S. Large Cap Value Equity Fund Class A shares is December 7, 2001. Inception dates of Class B and Class C shares are November 8, 2001 and December 12, 2001, respectively. Inception date of Class Y shares and the index is June 29, 2001.

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The Russell 1000 Value Index measures the performance of those Russell 1000 companies with lower price-to-book ratios and lower forecasted growth values. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

43

UBS U.S. Large Cap Value Equity Fund

Top ten equity holdings (unaudited)¹

As of December 31, 2009

	Percentage of net assets
Exxon Mobil Corp.		4.9	%
JPMorgan Chase & Co.		4.7
Pfizer, Inc.		4.0
Chevron Corp.		3.5
Covidien PLC		3.4
AT&T, Inc.		3.2
Wells Fargo & Co.		3.2
Bank of America Corp.		3.1
FedEx Corp.		2.8
Comcast Corp., Class A		2.6
Total		35.4	%

Industry diversification (unaudited)²

As a percentage of net assets as of December 31, 2009

Common stocks

Aerospace & defense	2.19	%
Air freight & logistics	2.76
Airlines	1.23
Auto components	1.06
Beverages	1.24
Capital markets	3.64
Chemicals	2.09
Commercial banks	3.78
Computers & peripherals	4.09
Containers & packaging	0.53
Diversified financial services	7.83
Diversified telecommunication services	3.25
Electric utilities	6.90
Energy equipment & services	2.95
Food & staples retailing	1.00
Health care equipment & supplies	3.36
Health care providers & services	2.21
Hotels, restaurants & leisure	1.71
Household durables	1.03
Household products	2.37
Independent power producers & energy traders	0.44
Industrial conglomerates	2.55
Insurance	5.05
Machinery	4.12
Media	5.71
Multi-utilities	1.15
Oil, gas & consumable fuels	15.64
Pharmaceuticals	6.07
Road & rail	1.15
Specialty retail	0.99
Total common stocks	98.09	%

Investment company

SPDR Trust, Series 1	0.68
Short-term investment	0.75
Total investments	99.52	%
Cash and other assets, less liabilities	0.48
Net assets	100.00	%

¹  Figures represent the direct investments of the UBS U.S. Large Cap Value Equity Fund. Figures could be different if a breakdown of the underlying investment company was included.

²  Figures represent the industry breakdown of direct investments of the UBS U.S. Large Cap Value Equity Fund. Figures would be different if a breakdown of the underlying investment company's industry diversification was included.

44

UBS U.S. Large Cap Value Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 98.09%
Aerospace & defense: 2.19%
General Dynamics Corp.		18,400	$	1,254,328
Air freight & logistics: 2.76%
FedEx Corp.		18,900		1,577,205
Airlines: 1.23%
Southwest Airlines Co.		61,600		704,088
Auto components: 1.06%
BorgWarner, Inc.		18,300		607,926
Beverages: 1.24%
PepsiCo, Inc.		11,700		711,360
Capital markets: 3.64%
Bank of New York Mellon Corp.		34,100		953,777
Morgan Stanley		38,200		1,130,720
				2,084,497
Chemicals: 2.09%
EI Du Pont de Nemours & Co.		35,500		1,195,285
Commercial banks: 3.78%
City National Corp.		7,900		360,240
Wells Fargo & Co.		66,800		1,802,932
				2,163,172
Computers & peripherals: 4.09%
Hewlett-Packard Co.		23,700		1,220,787
Seagate Technology		61,500		1,118,685
				2,339,472
Containers & packaging: 0.53%
Ball Corp.		5,900		305,030
Diversified financial services: 7.83%
Bank of America Corp.		117,200		1,765,032
JPMorgan Chase & Co.		65,170		2,715,634
				4,480,666
Diversified telecommunication services: 3.25%
AT&T, Inc.		66,250		1,856,987
Electric utilities: 6.90%
American Electric Power Co., Inc.		33,600		1,168,944
Exelon Corp.		22,500		1,099,575
FirstEnergy Corp.		17,900		831,455
Pepco Holdings, Inc.		50,200		845,870
				3,945,844

	Shares		Value
Energy equipment & services: 2.95%
Baker Hughes, Inc.		25,900	$	1,048,432
Noble Corp.		15,700		638,990
				1,687,422
Food & staples retailing: 1.00%
Kroger Co.		27,900		572,787
Health care equipment & supplies: 3.36%
Covidien PLC		40,200		1,925,178
Health care providers & services: 2.21%
UnitedHealth Group, Inc.		41,500		1,264,920
Hotels, restaurants & leisure: 1.71%
Carnival Corp.*		30,800		976,052
Household durables: 1.03%
Fortune Brands, Inc.		13,600		587,520
Household products: 2.37%
Procter & Gamble Co.		22,400		1,358,112
Independent power producers & energy traders: 0.44%
Dynegy, Inc., Class A*		138,600		250,866
Industrial conglomerates: 2.55%
General Electric Co.		96,600		1,461,558
Insurance: 5.05%
ACE Ltd.*		17,800		897,120
Aflac, Inc.		22,600		1,045,250
Principal Financial Group, Inc.		39,400		947,176
				2,889,546
Machinery: 4.12%
Illinois Tool Works, Inc.		27,200		1,305,328
PACCAR, Inc.		29,000		1,051,830
				2,357,158
Media: 5.71%
Comcast Corp., Class A		90,300		1,522,458
Interpublic Group of Cos., Inc.*		107,100		790,398
Time Warner, Inc.		32,700		952,878
				3,265,734
Multi-utilities: 1.15%
MDU Resources Group, Inc.		27,900		658,440

45

UBS U.S. Large Cap Value Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

	Shares		Value
Oil, gas & consumable fuels: 15.64%
Chevron Corp.		25,600	$	1,970,944
Exxon Mobil Corp.		41,450		2,826,476
Hess Corp.		17,200		1,040,600
Marathon Oil Corp.		22,500		702,450
Peabody Energy Corp.		19,400		877,074
Ultra Petroleum Corp.*		17,700		882,522
Williams Cos., Inc.		30,700		647,156
				8,947,222
Pharmaceuticals: 6.07%
Merck & Co., Inc.		32,300		1,180,242
Pfizer, Inc.		125,900		2,290,121
				3,470,363
Road & rail: 1.15%
Ryder System, Inc.		16,000		658,720
Specialty retail: 0.99%
Lowe's Cos., Inc.		24,200		566,038
Total common stocks
(cost $54,694,796)				56,123,496

	Shares		Value
Investment company: 0.68%
SPDR Trust, Series 1, (cost $383,632)		3,500	$	390,040
Short-term investment: 0.75%
Investment company: 0.75%
UBS Cash Management Prime Relationship Fund, 0.120%1,2 (cost $429,699)		429,699		429,699
Total investments: 99.52%
(cost $55,508,127)				56,943,235
Cash and other assets, less liabilities: 0.48%				273,160
Net assets: 100.00%			$	57,216,395

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $55,508,127; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	5,658,207
Gross unrealized depreciation		(4,223,099	)
Net unrealized appreciation of investments	$	1,435,108

*  Non-income producing security.

¹  Investment in affiliated investment company.

²  The rate shown reflects the yield at December 31, 2009.

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks	$	56,123,496	$	—	$	—	$	56,123,496
Investment company		390,040		—		—		390,040
Short-term investment		—		429,699		—		429,699
Total	$	56,513,536	$	429,699	$	—	$	56,943,235

See accompanying notes to financial statements.
46

UBS U.S. Mid Cap Growth Equity Fund

Portfolio performance

For the six months ended December 31, 2009, Class A Shares of UBS U.S. Mid Cap Growth Equity Fund (the "Fund") returned 23.48% (Class A shares returned 16.71% after the deduction of the maximum sales charge), while Class Y shares returned 23.68%. The Fund's benchmark, the Russell Midcap Growth Index (the "Index"), returned 25.45% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 50; please note that the Fund's returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund lagged its benchmark due to stock selection.

Portfolio performance summary¹

What worked

•  Stock selection in the information technology sector made a positive contribution to Fund returns. Information technology makes up the largest weight in the Fund's benchmark Russell Midcap Growth Index, and was the Fund's largest source of relative return during the period.

  – Cognizant Technology, a company that offers outsourcing services and consulting, posted positive third-quarter earnings and offered similar guidance for 2010. (For details, see "Portfolio highlights.")

•  The Fund's energy stocks posted strong relative performance during the six months. An overweight to the sector was additive to returns, as rising commodity prices caused most energy stocks to rally.

  In particular, oil and natural gas companies benefited from the acquisition of XTO Energy by Exxon Mobil for $30 billion. The Fund held Newfield Exploration and Continental Resources, two oil and gas producers whose shares rose throughout the period. We continue to favor companies that have strong management teams and that are leveraged to an increase in oil and gas production. (For details, see "Portfolio highlights.")

•  An underweight to the utilities sector contributed to relative returns. The Fund successfully avoided this sector as utilities and other defensive names lagged the market's sharp rebound.

What didn't work

•  Stock selection in industrials, combined with a slight overweight to the sector, detracted from returns.

  –Industrials service firm Quanta Services, which provides electrical transmission projects and gas pipelines, disappointed during the period. The company's shares can be volatile, and suffered a period of underperformance.

  – Tetra Tech, a provider of infrastructure project services, lagged its more cyclical peers in the market. (For details, see "Portfolio highlights.")

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

47

UBS U.S. Mid Cap Growth Equity Fund

•  The Fund's consumer discretionary stocks underperformed the market during the six-month period.

  –Video game hardware company GameStop lagged the market due to weak earnings and concern about reduced demand for hard games. (For details, see "Portfolio highlights.")

  – Strayer Education and the entire for-profit education industry declined during the fourth quarter of 2009.

•  An overweight to the health care sector hindered performance, as well. Prospects for the sector were uncertain due to the pending health care legislation in Washington. These companies were under pressure, and our overweight detracted from performance.

•  The Fund's cash position caused it to lag the market. The Fund does not employ cash as a tactical allocation. Rather, we keep 1% to 2% of assets in cash in order to fund new purchases. This position detracted from returns as the market rose sharply.

Portfolio highlights

•  Shares of Cognizant Technology performed strongly during the period. Cognizant is a leading provider of information technology, consulting, and business process outsourcing services, combining an onsite and offshore delivery model. Since 2000, India-based information technology services companies have grown at a 43% compounded annual growth rate ("CAGR"). Cognizant has shown a 46% CAGR. Despite this strong growth, the worldwide market share for Indian IT outsourcing firms is estimated at just 5%, showing IT outsourcing is still in the early stage of adoption.

•  Continental Resources added to Fund returns during the six months. Continental is an exploration and production company with a significant interest in oil prospects and production, as well as in natural gas. This stock is one of the few ways to invest in a quality management team that is highly leveraged to oil production in the mid cap space.

•  Tetra Tech continues to gain new business momentum in the environmental, water and alternative energy segments of the infrastructure landscape. The shares have underperformed relative to the industrial sector recently, as higher beta names with less backlog and contract visibility outperformed. However, we believe Tetra Tech stands to benefit from the significant budget increases for their largest federal customers: the Army Core of Engineers, the Environmental Protection Agency and the Department of Education. As such, we continue to like the prospects for Tetra Tech.

48

UBS U.S. Mid Cap Growth Equity Fund

•  The Fund's investment in GameStop detracted from performance during the period, but we continue to believe the company has a strong business model. It sells new game and console hardware in the video gaming industry, and it also has a well-developed used game (high margin) model that the company executes better than anyone else to date. It is also international in its operations, thus less reliant on pure US industry trends. However, industry and Wall Street speculation concerning the viability of downloadable games, which cut out the retailer, makes investors nervous. We continue to believe GameStop will demonstrate significant strength and growth going forward.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

49

UBS U.S. Mid Cap Growth Equity Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			Inception1
Before deducting maximum sales charge
Class A2		23.48	%		41.33	%		(3.97	)%
Class C3		23.08	%		40.35	%		(5.68	)%
Class Y4		23.68	%		41.58	%		(3.23	)%
After deducting maximum sales charge
Class A2		16.71	%		33.60	%		(5.41	)%
Class C3		22.08	%		39.35	%		(5.68	)%
Russell Midcap Growth Index5		25.45	%		46.29	%		(1.62	)%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—5.77% and 1.46%; Class C—7.02% and 2.21%; Class Y—5.02% and 1.21%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's expenses (excluding expenses incurred through investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, otherwise do not exceed 1.45% for Class A shares, 2.20% for Class C sh ares and 1.20% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements, to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund.

¹  Inception date of UBS U.S. Mid Cap Growth Equity Fund Class A shares is March 31, 2006. Inception date of Class C shares is April 21, 2006. Inception date of Class Y shares and the index is March 27, 2006.

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁴  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁵  The Russell Midcap Growth Index is an unmanaged index that measures the performance of those Russell mid cap companies with higher price-to-book ratios and higher forecasted growth values. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

50

UBS U.S. Mid Cap Growth Equity Fund

Top ten equity holdings (unaudited)¹

As of December 31, 2009

	Percentage of net assets
WMS Industries, Inc.		4.4	%
Regal-Beloit Corp.		4.1
Cognizant Technology Solutions Corp., ClassA		3.3
Express Scripts, Inc.		3.1
Continental Resources, Inc.		2.7
Amphenol Corp., ClassA		2.6
NetApp, Inc.		2.5
Solera Holdings, Inc.		2.4
MSC Industrial Direct Co., ClassA		2.3
C.R. Bard, Inc.		2.3
Total		29.7	%

Industry diversification (unaudited)²

As a percentage of net assets as of December 31, 2009

Common stocks

Beverages	2.07	%
Biotechnology	2.55
Capital markets	3.91
Chemicals	4.06
Commercial services & supplies	3.57
Communications equipment	0.61
Computers & peripherals	5.41
Construction & engineering	1.52
Distributors	1.05
Diversified consumer services	2.04
Diversified financial services	3.83
Electrical equipment	4.08
Electronic equipment, instruments & components	2.57
Energy equipment & services	0.68
Food products	1.99
Health care equipment & supplies	3.52
Health care providers & services	6.99
Hotels, restaurants & leisure	5.23
Internet & catalog retail	0.53
IT services	3.30
Life sciences tools & services	2.05
Machinery	4.10
Multiline retail	0.56
Oil, gas & consumable fuels	6.68
Professional services	1.80
Real estate investment trust (REIT)	0.96
Semiconductors & semiconductor equipment	2.97
Software	8.20
Specialty retail	5.81
Trading companies & distributors	2.34
Wireless telecommunication services	2.98
Total common stocks	97.96	%

Investment company

iShares Russell Midcap Growth Index Fund	1.30
Short-term investment	1.18
Total investments	100.44	%
Liabilities, in excess of cash and other assets	(0.44	)
Net assets	100.00	%

¹  Figures represent the direct investments of the UBS U.S. Mid Cap Growth Equity Fund. Figures could be different if a breakdown of the underlying investment company was included.

²  Figures represent the industry breakdown of direct investments of the UBS U.S. Mid Cap Growth Equity Fund. Figures would be different if a breakdown of the underlying investment company's industry diversification was included.

51

UBS U.S. Mid Cap Growth Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 97.96%
Beverages: 2.07%
Central European Distribution Corp.*		3,800	$	107,958
Biotechnology: 2.55%
BioMarin Pharmaceutical, Inc.*		2,800		52,668
Talecris Biotherapeutics Holdings Corp.*		3,600		80,172
				132,840
Capital markets: 3.91%
Artio Global Investors, Inc.*		3,300		84,117
TD Ameritrade Holding Corp.*		6,200		120,156
				204,273
Chemicals: 4.06%
Air Products & Chemicals, Inc.		500		40,530
Ecolab, Inc.		1,900		84,702
Scotts Miracle-Gro Co., Class A		2,200		86,482
				211,714
Commercial services & supplies: 3.57%
EnergySolutions, Inc.		8,200		69,618
Tetra Tech, Inc.*		4,300		116,831
				186,449
Communications equipment: 0.61%
F5 Networks, Inc.*		600		31,788
Computers & peripherals: 5.41%
NetApp, Inc.*		3,800		130,682
STEC, Inc.*		3,900		63,726
Teradata Corp.*		2,800		88,004
				282,412
Construction & engineering: 1.52%
Quanta Services, Inc.*		3,800		79,192
Distributors: 1.05%
LKQ Corp.*		2,800		54,852
Diversified consumer services: 2.04%
Strayer Education, Inc.		500		106,245
Diversified financial services: 3.83%
CME Group, Inc.		100		33,595
IntercontinentalExchange, Inc.*		1,000		112,300
MSCI, Inc., Class A*		1,700		54,060
				199,955

	Shares		Value
Electrical equipment: 4.08%
Regal-Beloit Corp.		4,100	$	212,954
Electronic equipment, instruments & components: 2.57%
Amphenol Corp., Class A		2,900		133,922
Energy equipment & services: 0.68%
National Oilwell Varco, Inc.		800		35,272
Food products: 1.99%
Flowers Foods, Inc.		1,600		38,016
TreeHouse Foods, Inc.*		1,700		66,062
				104,078
Health care equipment & supplies: 3.52%
C.R. Bard, Inc.		1,550		120,745
Immucor, Inc.*		3,100		62,744
				183,489
Health care providers & services: 6.99%
DaVita, Inc.*		1,800		105,732
Express Scripts, Inc.*		1,900		164,255
Fresenius Medical Care AG & Co. KGaA ADR		900		47,709
Henry Schein, Inc.*		900		47,340
				365,036
Hotels, restaurants & leisure: 5.23%
International Game Technology		2,400		45,048
WMS Industries, Inc.*		5,700		228,000
				273,048
Internet & catalog retail: 0.53%
NetFlix, Inc.*		500		27,570
IT services: 3.30%
Cognizant Technology Solutions Corp., Class A*		3,800		172,140
Life sciences tools & services: 2.05%
Qiagen NV*		1,600		35,712
Thermo Fisher Scientific, Inc.*		1,500		71,535
				107,247
Machinery: 4.10%
Bucyrus International, Inc.		1,800		101,466
Joy Global, Inc.		700		36,113
SPX Corp.		1,400		76,580
				214,159

52

UBS U.S. Mid Cap Growth Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Multiline retail: 0.56%
Dollar General Corp.*		1,300	$	29,159
Oil, gas & consumable fuels: 6.68%
Continental Resources, Inc.*		3,300		141,537
Newfield Exploration Co.*		2,000		96,460
Southwestern Energy Co.*		2,300		110,860
				348,857
Professional services: 1.80%
Monster Worldwide, Inc.*		5,400		93,960
Real estate investment trust (REIT): 0.96%
Digital Realty Trust, Inc., REIT		1,000		50,280
Semiconductors & semiconductor equipment: 2.97%
ASML Holding NV, Class G		1,300		44,317
Atmel Corp. *		24,000		110,640
				154,957
Software: 8.20%
Activision Blizzard, Inc.*		2,400		26,664
Concur Technologies, Inc.*		2,200		94,050
Micros Systems, Inc.*		1,300		40,339
Salesforce.com, Inc.*		1,100		81,147
SolarWinds, Inc.*		2,600		59,826
Solera Holdings, Inc.		3,500		126,035
				428,061
Specialty retail: 5.81%
Dick's Sporting Goods, Inc.*		2,200		54,714
GameStop Corp., Class A*		2,500		54,850
O'Reilly Automotive, Inc.*		2,600		99,112
Urban Outfitters, Inc.*		2,700		94,473
				303,149

	Shares		Value
Trading companies & distributors: 2.34%
MSC Industrial Direct Co., Class A		2,600	$	122,200
Wireless telecommunication services: 2.98%
American Tower Corp., Class A*		2,100		90,741
SBA Communications Corp., Class A*		1,900		64,904
				155,645
Total common stocks
(cost $4,434,178)				5,112,861
Investment company: 1.30%
iShares Russell Midcap Growth Index Fund (cost $64,462)		1,500		68,010
	Units
Short-term investment: 1.18%
Investment company: 1.18%
UBS Cash Management Prime Relationship Fund, 0.120%1,2 (cost $61,660)		61,660		61,660
Total investments: 100.44%
(cost $4,560,300)				5,242,531
Liabilities, in excess of cash and other assets: (0.44)%				(22,875	)
Net assets: 100.00%			$	5,219,656

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $4,560,300; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	926,625
Gross unrealized depreciation		(244,394	)
Net unrealized appreciation of investments	$	682,231

*  Non-income producing security.

¹  Investment in affiliated investment company.

²  The rate shown reflects the yield at December 31, 2009.

ADR  American depositary receipt

53

UBS U.S. Mid Cap Growth Equity Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks	$	5,112,861	$	—	$	—	$	5,112,861
Investment company		68,010		—		—		68,010
Short-term investment		—		61,660		—		61,660
Total	$	5,180,871	$	61,660	$	—	$	5,242,531

See accompanying notes to financial statements.
54

UBS U.S. Small Cap Growth Fund

Portfolio performance

For the six months ended December 31, 2009, Class A Shares of UBS U.S. Small Cap Growth Fund (the "Fund") returned 22.90% (Class A shares returned 16.11% after the deduction of the maximum sales charge), while Class Y shares returned 23.03%. The Fund's benchmark, the Russell 2000 Growth Index (the "Index"), returned 20.75% over the same time period. (Class Y shares have lower expenses than other share classes of the Fund. Returns for all share classes over various time periods are shown on page 57; please note that the Fund's returns do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares, while the Index returns do not reflect the deduction of fees and expenses.)

The Fund outperformed its benchmark due to stock selection.

Portfolio performance summary¹

What worked

•  Stock selection in the information technology sector made a positive contribution to Fund returns. Information technology was the Fund's largest source of relative return during the period.

  –Successful names included AsiaInfo Holdings, a provider of telecommunications software solutions. AsiaInfo saw its shares rise during the period after announcing the acquisition of its largest competitor. The company is now the dominant provider of software solutions in its marketplace.

  – F5 Networks, an internet solutions provider, and Blue Coat Systems, an application and delivery network solutions provider, were positive for performance, as well. The companies both reported positive third quarter earnings and guidance for 2010. (For details, see "Portfolio highlights.")

•  The Fund's financial stocks contributed strongly to relative returns.

  –Our focus on real estate investment trusts, particularly hospitals and outpatient facilities, was successful during the period. Two of the largest positive contributors were Ventas and Biomed.

  –The Fund successfully avoided commercial banks, which performed poorly during the six months.

•  The Fund's energy stocks posted strong relative performance during the six months. An overweight to the sector was additive to returns, as rising commodity prices caused most energy stocks to rally. In particular, Whiting Petroleum saw its shares rise due to strengthening commodity oil and natural gas prices. (For details, see "Portfolio highlights.")

•  Stock selection in the industrial sector was positive for performance, as well. Bucyrus International, a manufacturer of excavation machinery used in surface mining, saw its shares rise during the month after the management team made positive comments at an investor conference regarding order rates and improving industry trends. (For details, see "Portfolio highlights.")

What didn't work

•  The Fund's consumer discretionary stocks underperformed the market during the six months. Two specialty apparel companies, Coldwater Creek and Iconix Brand, sold off based on weaker-than-expected earnings in the third quarter of 2009. (We sold Iconix Brand in October 2009.)

¹  For a detailed commentary on the market environment in general during the reporting period, see pages 2-3.

55

UBS U.S. Small Cap Growth Fund

•  Holding a small cash position hindered relative returns. The Fund does not employ cash as a tactical allocation. Rather, we keep a small percentage of assets in cash in order to fund new purchases. This position detracted from returns as the market rose sharply.

•  Stock selection within the consumer staples sector detracted from returns. The Fund held household products company Chattem, which disappointed during August and September. After we sold the stock, Chattem was acquired, which caused its shares to rally sharply. The Fund's lack of exposure during this rally was a negative contributor.

•  An overweight to the health care sector hindered performance, as well. Prospects for the sector were uncertain due to the pending health care legislation in Washington. These companies were under pressure, and our overweight detracted from performance.

  Additionally, stock selection within health care was negative, particularly our decision not to hold Human Genome Sciences, which performed well during the period. (For details, see "Portfolio highlights.")

Portfolio highlights

•  The Fund benefited from holding F5 Networks, a provider of integrated internet traffic management solutions. The company's software-based solutions manage, control and optimize internet traffic and content for its customers, while at the same time offering a layer of security protection. The company has strengthened its security and WAN optimization capabilities through a series of acquisitions. We believe the new product cycle will have a positive impact on the company's revenue growth and will expand its margins.

•  Bucyrus International was a successful holding, as well. The company, a manufacturer of excavation machinery used in surface mining, should be a beneficiary of any rebound in global growth. Bucyrus enjoys a $2.3 billion backlog, and has shifted original equipment orders from 2009 to 2010 to help smooth reported results. Management should be able to expand margins by continuing to cut expenses, as well as increasing subsidiary DBT's aftermarket revenue. We believe substantial cash flow over the next few years will enable Bucyrus to pay down debt or fund acquisitions.

•  Shares of Whiting Petroleum Corp. performed strongly during the period. Whiting is an oil and natural gas exploration and production company with operations primarily in the Permian Basin, Rocky Mountains, Mid-Continent and Gulf Coast. The primary driver of reserve and production growth over the next several years will be driven by increased drilling in the company's Bakken (North Dakota) play. Whiting currently has rights to over 300,000 net acres in the Bakken, with the potential to add up to almost 200 million BOE in proved reserves. The company is also seeing positive results from its CO2 injection programs in the Permian Basin.

•  Human Genome Sciences is a developer of protein and antibody drugs. The company's share price increased during the period after the company released positive top line data for their lupus drug Benlysta. Because the Fund did not hold the stock, its relative returns were negatively affected.

This letter is intended to assist shareholders in understanding how the Fund performed during the six months ended December 31, 2009. The views and opinions in the letter were current as of February 17, 2010. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and we reserve the right to change our views about individual securities, sectors and markets at any time. As a result, the views expressed should not be relied upon as a forecast of the Fund's future investment intent. We encourage you to consult your financial advisor regarding your personal investment program.

Mutual funds are sold by prospectus only. You should read it carefully and consider a fund's investment objectives, risks, charges, expenses and other important information contained in the prospectus before investing. Prospectuses for most of our funds can be obtained from your financial advisor, by calling UBS Funds at 800-647 1568 or by visiting our Web site at www.ubs.com.

56

UBS U.S. Small Cap Growth Fund

Average annual total returns for periods ended 12/31/09 (unaudited)

	6 months			1 year			5 years			10 years			Inception1
Before deducting maximum sales charge
Class A2		22.90	%		33.16	%		(2.20	)%		2.43	%		5.46	%
Class B3		22.36	%		32.21	%		(2.91	)%		N/A			2.37	%6
Class C4		22.29	%		31.99	%		(2.94	)%		N/A			1.93	%
Class Y5		23.03	%		33.41	%		(1.95	)%		2.70	%		4.06	%
After deducting maximum sales charge
Class A2		16.11	%		25.84	%		(3.30	)%		1.86	%		4.92	%
Class B3		17.36	%		27.21	%		(3.25	)%		N/A			2.37	%6
Class C4		21.29	%		30.99	%		(2.94	)%		N/A			1.93	%
Russell 2000 Growth Index7		20.75	%		34.47	%		0.87	%		(1.37	)%		1.20	%

The annualized gross and net expense ratios, respectively, for each class of shares as in the October 28, 2009 prospectuses were as follows: Class A—1.68% and 1.41%; Class B—2.56% and 2.16%; Class C—2.46% and 2.16%; Class Y—1.26% and 1.16%. Net expenses reflect fee waivers and/or expense reimbursements, if any, pursuant to an agreement that is in effect to cap the expenses. The net expenses listed above reflect the management fee waiver/expense reimbursement put in place for the fiscal year ending June 30, 2010. The Trust, with respect to the Fund, and the Advisor have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies and interest expense) to the extent necessary so that the Fund's operating expenses (excluding expenses incurred through investment in other investment companies and interest expense), through the fiscal year ending June 30, 2010, do not exceed 1.40% for Class A shares, 2.15% for Class B shares, 2.15% for Class C shares and 1.15% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund. Pursuant to the previous fee waiver and expense reimbursement agreement, the actual "Net expenses" (including Acquired fund fees and expenses) for the fiscal year ending June 30, 2009 were 1.29% for the Class A shares, 2.04% for the Class B shares, 2.04% for the Class C shares and 1.04% for the Class Y shares.

¹  Inception date of UBS U.S. Small Cap Growth Fund Class A shares is December 31, 1998. Inception dates of Class B and Class C shares are November 7, 2001 and November 19, 2001, respectively. Inception date of Class Y shares and the index is September 30, 1997.

²  Maximum sales charge for Class A shares is 5.5%. Class A shares bear ongoing 12b-1 service fees.

³  Maximum contingent deferred sales charge for Class B shares is 5% imposed on redemptions and is reduced to 0% after a maximum of six years. Class B shares bear ongoing 12b-1 service and distribution fees.

⁴  Maximum contingent deferred sales charge for Class C shares is 1% imposed on redemptions and is reduced to 0% after one year. Class C shares bear ongoing 12b-1 service and distribution fees.

⁵  The Fund offers Class Y shares to a limited group of eligible investors, including certain qualifying retirement plans. Class Y shares do not bear initial or contingent deferred sales charges or ongoing 12b-1 service and distribution fees.

⁶  Assumes the conversion of Class B to Class A shares at the end of the sixth year following the date of purchase.

⁷  The Russell 2000 Growth Index is an unmanaged index composed of those companies in the Russell 2000 Index with higher price-to-book ratios and higher forecasted growth values. The Russell 2000 Index is an index composed of the 2,000 smallest companies in the Russell 3000 Index. Investors should note that indices do not reflect the deduction of fees, expenses or taxes.

If an investor sells or exchanges shares less than 90 days after purchase, a redemption fee of 1.00% of the amount sold or exchanged will be deducted at the time of the transaction, except as noted otherwise in the prospectus.

The Fund invests in IPOs which may have a magnified impact on performance.

Past performance does not predict future performance, and the performance information provided does not reflect the deduction of taxes that a shareholder would pay on Fund distributions or the redemption of Fund shares. The return and principal value of an investment will fluctuate, so that an investor's shares, when redeemed, may be worth more or less than their original cost. Performance results assume reinvestment of all dividends and capital gain distributions at net asset value on the ex-dividend dates. Total returns for periods of less than one year have not been annualized. Current performance may be higher or lower than the performance data quoted. For month-end performance figures, please visit http://www.ubs.com.

57

UBS U.S. Small Cap Growth Fund

Top ten equity holdings (unaudited)¹

As of December 31, 2009

	Percentage of net assets
Whiting Petroleum Corp.		2.3	%
Bucyrus International, Inc.		2.2
F5 Networks, Inc.		2.2
Rock-Tenn Co., Class A		1.9
AsiaInfo Holdings, Inc.		1.8
EMCOR Group, Inc.		1.8
EnerSys		1.7
WMS Industries, Inc.		1.7
ArcSight, Inc.		1.7
Ventas, Inc.		1.7
Total		19.0	%

Industry diversification (unaudited)²

As a percentage of net assets as of December 31, 2009

Common stocks

Aerospace & defense	1.06	%
Air freight & logistics	1.41
Auto components	1.49
Biotechnology	6.58
Chemicals	2.16
Commercial services & supplies	1.61
Communications equipment	7.15
Computers & peripherals	1.68
Construction & engineering	2.98
Containers & packaging	1.88
Distributors	1.25
Diversified telecommunication services	0.44
Electrical equipment	4.30
Electronic equipment, instruments & components	1.68
Energy equipment & services	2.51
Health care equipment & supplies	4.22
Health care providers & services	6.16
Health care technology	2.19
Hotels, restaurants & leisure	3.44
Household durables	0.95
Internet software & services	1.39
IT services	1.90
Machinery	2.25
Media	1.10
Metals & mining	0.88
Oil, gas & consumable fuels	4.18
Paper & forest products	0.35
Pharmaceuticals	1.05
Real estate investment trust (REIT)	3.10
Road & rail	2.81
Semiconductors & semiconductor equipment	6.23
Software	10.28
Specialty retail	4.32
Textiles, apparel & luxury goods	2.53
Total common stocks	97.51	%

Investment company

iShares Russell 2000 Growth Index Fund	1.04
Short-term investment	2.03
Investment of cash collateral from securities loaned	4.92
Total investments	105.50	%
Liabilities, in excess of cash and other assets	(5.50	)
Net assets	100.00	%

¹  Figures represent the direct investments of the UBS U.S. Small Cap Growth Fund. Figures could be different if a breakdown of the underlying investment company was included.

²  Figures represent the industry breakdown of direct investments of the UBS U.S. Small Cap Growth Fund. Figures would be different if a breakdown of the underlying investment company's industry diversification was included.

58

UBS U.S. Small Cap Growth Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Common stocks: 97.51%
Aerospace & defense: 1.06%
DigitalGlobe, Inc.*		38,700	$	936,540
GeoEye, Inc.*		35,465		988,764
				1,925,304
Air freight & logistics: 1.41%
Hub Group, Inc., Class A*		95,200		2,554,216
Auto components: 1.49%
Tenneco, Inc.*		152,200		2,698,506
Biotechnology: 6.58%
Affymax, Inc.*		37,700		932,698
Genomic Health, Inc.*		58,390		1,142,108
Halozyme Therapeutics, Inc.*		146,979		862,767
Incyte Corp. Ltd.*		121,500		1,106,865
Isis Pharmaceuticals, Inc.*		64,500		715,950
Medivation, Inc.*1		36,284		1,366,093
Micromet, Inc.*1		122,000		812,520
Onyx Pharmaceuticals, Inc.*		26,200		768,708
Orexigen Therapeutics, Inc.*		95,900		713,496
Regeneron Pharmaceuticals, Inc.*		58,900		1,424,202
Seattle Genetics, Inc.*		102,918		1,045,647
Vanda Pharmaceuticals, Inc.*1		93,900		1,055,436
				11,946,490
Chemicals: 2.16%
Scotts Miracle-Gro Co., Class A		37,094		1,458,165
Solutia, Inc.*		194,100		2,465,070
				3,923,235
Commercial services & supplies: 1.61%
Clean Harbors, Inc.*		21,100		1,257,771
EnergySolutions, Inc.		33,931		288,074
Tetra Tech, Inc.*		51,000		1,385,670
				2,931,515
Communications equipment: 7.15%
Acme Packet, Inc.*		93,700		1,030,700
Blue Coat Systems, Inc.*		96,600		2,756,964
F5 Networks, Inc.*		74,900		3,968,202
Palm, Inc.*1		79,500		798,180
Polycom, Inc.*		92,300		2,304,731
Riverbed Technology, Inc.*		92,200		2,117,834
				12,976,611
Computers & peripherals: 1.68%
Compellent Technologies, Inc.*		69,900		1,585,332
STEC, Inc.*1		89,400		1,460,796
				3,046,128

	Shares		Value
Construction & engineering: 2.98%
EMCOR Group, Inc.*		120,600	$	3,244,140
Orion Marine Group, Inc.*		102,800		2,164,968
				5,409,108
Containers & packaging: 1.88%
Rock-Tenn Co., Class A		67,556		3,405,498
Distributors: 1.25%
LKQ Corp.*		115,800		2,268,522
Diversified telecommunication services: 0.44%
Neutral Tandem, Inc.*		35,399		805,327
Electrical equipment: 4.30%
EnerSys*		143,100		3,129,597
Regal-Beloit Corp.		48,100		2,498,314
Woodward Governor Co.		84,900		2,187,873
				7,815,784
Electronic equipment, instruments & components: 1.68%
Tech Data Corp.*		65,200		3,042,232
Energy equipment & services: 2.51%
Dril-Quip, Inc.*		54,000		3,049,920
Helix Energy Solutions Group, Inc.*		127,900		1,502,825
				4,552,745
Health care equipment & supplies: 4.22%
Haemonetics Corp.*		16,300		898,945
ResMed, Inc.*		38,000		1,986,260
STERIS Corp.		29,300		819,521
Thoratec Corp.*		81,000		2,180,520
Zoll Medical Corp.*		66,600		1,779,552
				7,664,798
Health care providers & services: 6.16%
Emergency Medical Services Corp., Class A*		37,500		2,030,625
HMS Holdings Corp.*		41,645		2,027,695
IPC The Hospitalist Co., Inc.*		58,900		1,958,425
Mednax, Inc.*		25,400		1,526,794
Team Health Holdings, Inc.*1		177,500		2,488,550
VCA Antech, Inc.*		46,500		1,158,780
				11,190,869

59

UBS U.S. Small Cap Growth Fund

Portfolio of investments

December 31, 2009 (unaudited)

	Shares		Value
Health care technology: 2.19%
MedAssets, Inc.*		85,400	$	1,811,334
Phase Forward, Inc.*		66,100		1,014,635
SXC Health Solutions Corp.*		21,316		1,149,998
				3,975,967
Hotels, restaurants & leisure: 3.44%
California Pizza Kitchen, Inc.*		149,284		2,007,870
Panera Bread Co., Class A*		16,900		1,131,793
WMS Industries, Inc.*		77,800		3,112,000
				6,251,663
Household durables: 0.95%
Ryland Group, Inc.		87,500		1,723,750
Internet software & services: 1.39%
VistaPrint NV*		44,600		2,527,036
IT services: 1.90%
NCI, Inc., Class A*		43,717		1,208,775
TNS, Inc.*		86,900		2,232,461
				3,441,236
Machinery: 2.25%
Bucyrus International, Inc.		72,500		4,086,825
Media: 1.10%
National CineMedia, Inc.		120,700		1,999,999
Metals & mining: 0.88%
Steel Dynamics, Inc.		90,600		1,605,432
Oil, gas & consumable fuels: 4.18%
Arena Resources, Inc.*		49,000		2,112,880
Goodrich Petroleum Corp.*1		57,500		1,400,125
Whiting Petroleum Corp.*		57,200		4,086,940
				7,599,945
Paper & forest products: 0.35%
Schweitzer-Mauduit International, Inc.		9,000		633,150
Pharmaceuticals: 1.05%
MAP Pharmaceuticals, Inc.*		84,870		808,811
Nektar Therapeutics*		118,200		1,101,624
				1,910,435

	Shares		Value
Real estate investment trust (REIT): 3.10%
BioMed Realty Trust, Inc.		61,600	$	972,048
Franklin Street Properties Corp.		109,800		1,604,178
Ventas, Inc.		69,900		3,057,426
				5,633,652
Road & rail: 2.81%
Knight Transportation, Inc.		112,300		2,166,267
Landstar System, Inc.		75,900		2,942,643
				5,108,910
Semiconductors & semiconductor equipment: 6.23%
Atheros Communications, Inc.*		76,740		2,627,578
Cirrus Logic, Inc.*		130,118		887,405
Cymer, Inc.*		49,100		1,884,458
Mellanox Technologies Ltd.*		47,292		891,927
Skyworks Solutions, Inc.*		175,800		2,494,602
Veeco Instruments, Inc.*		76,600		2,530,864
				11,316,834
Software: 10.28%
ArcSight, Inc.*		120,516		3,082,799
AsiaInfo Holdings, Inc.*		108,600		3,309,042
Factset Research Systems, Inc.		37,700		2,483,299
Fortinet, Inc.*		27,300		479,661
NICE Systems Ltd. ADR*		91,900		2,852,576
Rovi Corp.*		91,700		2,922,479
Sourcefire, Inc.*		44,155		1,181,146
Ultimate Software Group, Inc.*		80,504		2,364,403
				18,675,405
Specialty retail: 4.32%
Big 5 Sporting Goods Corp.		52,390		900,060
Chico's FAS, Inc.*		190,200		2,672,310
Children's Place Retail Stores, Inc.*		56,400		1,861,764
Coldwater Creek, Inc.*		58,438		260,634
Rue21, Inc.*		19,200		539,328
Wet Seal, Inc., Class A*		468,500		1,616,325
				7,850,421
Textiles, apparel & luxury goods: 2.53%
Phillips-Van Heusen Corp.		64,900		2,640,132
Skechers U.S.A., Inc., Class A*		66,717		1,962,147
				4,602,279
Total common stocks
(cost $144,778,036)				177,099,827

60

UBS U.S. Small Cap Growth Fund

Portfolio of investments

December 31, 2009 (unaudited)

Concluded

	Shares		Value
Investment company: 1.04%
iShares Russell 2000 Growth Index Fund (cost $1,815,254)1		27,600	$	1,878,732
Short-term investment: 2.03%
Investment company: 2.03%
UBS Cash Management Prime Relationship Fund, 0.120%2,3 (cost $3,695,023)		3,695,023		3,695,023

	Shares		Value
Investment of cash collateral from securities loaned: 4.92%
UBS Private Money Market Fund LLC, 0.134%2,3 (cost $8,931,068)		8,931,068	$	8,931,068
Total investments: 105.50%
(cost $159,219,381)				191,604,650
Liabilities, in excess of cash and other assets: (5.50)%				(9,987,817	)
Net assets: 100.00%			$	181,616,833

Notes to portfolio of investments

Aggregate cost for federal income tax purposes, which was substantially the same for book purposes, was $159,219,381; and net unrealized appreciation consisted of:

Gross unrealized appreciation	$	39,058,189
Gross unrealized depreciation		(6,672,920	)
Net unrealized appreciation of investments	$	32,385,269

*  Non-income producing security.

¹  Security, or portion thereof, was on loan at December 31, 2009.

²  Investment in affiliated investment company.

³  The rate shown reflects the yield at December 31, 2009.

ADR  American depositary receipt

The following is a summary of the inputs used as of December 31, 2009 in valuing the Fund's investments:

Measurements at 12/31/09
Description	Unadjusted quoted prices in active markets for identical investments (Level 1)		Other significant observable inputs (Level 2)		Unobservable inputs (Level 3)		Total
Common stocks	$	177,099,827	$	—	$	—	$	177,099,827
Investment company		1,878,732		—		—		1,878,732
Short-term investment		—		3,695,023		—		3,695,023
Investment of cash collateral from securities loaned		—		8,931,068		—		8,931,068
Total	$	178,978,559	$	12,626,091	$	—	$	191,604,650

See accompanying notes to financial statements.
61

The UBS Funds

December 31, 2009 (unaudited)

Explanation of expense disclosure (unaudited)

As a shareholder of the Funds, you incur two types of costs: (1) transactional costs (as applicable); including sales charges (loads); and (2) ongoing costs, including management fees; service and/or distribution (12b-1) fees (if applicable); and other Fund expenses. This example is intended to help you understand your ongoing costs (in dollars) of investing in each Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The example below is based on an investment of $1,000 invested at the beginning of the period and held for the entire period, July 1, 2009 to December 31, 2009.

Actual expenses

The first line of each class of shares in the table below provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over a period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses paid during period" to estimate the expenses you paid on your account during this period.

Hypothetical example for comparison purposes

The second line for each class of shares in the table below provides information about hypothetical account values and hypothetical expenses based on that Fund's actual expense ratios for each class of shares and an assumed rate of return of 5% per year before expenses, which is not that Fund's actual return for each class of shares. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in a Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transactional costs (as applicable), such as sales charges (loads). Therefore, the second line in the table for each class of shares is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transactional costs were included, your costs would have been higher.

This projection assumes that annualized expense ratios were in effect during the period July 1, 2009 to December 31, 2009.

62

The UBS Funds

December 31, 2009 (unaudited)

	Beginning account value July 1, 2009		Ending account value December 31, 2009		Expenses paid during period* 07/01/09 – 12/31/09		Expense ratio during period
UBS Global Equity Fund
Class A Actual	$	1,000.00	$	1,266.50	$	8.57		1.50	%
Hypothetical (5% annual return before expenses)		1,000.00		1,017.64		7.63		1.50
Class B Actual		1,000.00		1,261.70		12.83		2.25
Hypothetical (5% annual return before expenses)		1,000.00		1,013.86		11.42		2.25
Class C Actual		1,000.00		1,261.60		12.83		2.25
Hypothetical (5% annual return before expenses)		1,000.00		1,013.86		11.42		2.25
Class Y Actual		1,000.00		1,267.70		7.14		1.25
Hypothetical (5% annual return before expenses)		1,000.00		1,018.90		6.36		1.25
UBS International Equity Fund
Class A Actual		1,000.00		1,226.10		7.01		1.25
Hypothetical (5% annual return before expenses)		1,000.00		1,018.90		6.36		1.25
Class B Actual		1,000.00		1,220.70		11.19		2.00
Hypothetical (5% annual return before expenses)		1,000.00		1,015.12		10.16		2.00
Class C Actual		1,000.00		1,222.00		11.20		2.00
Hypothetical (5% annual return before expenses)		1,000.00		1,015.12		10.16		2.00
Class Y Actual		1,000.00		1,227.00		5.61		1.00
Hypothetical (5% annual return before expenses)		1,000.00		1,020.16		5.09		1.00
UBS U.S. Equity Alpha Fund
Class A Actual		1,000.00		1,255.20		12.62		2.22
Hypothetical (5% annual return before expenses)		1,000.00		1,014.01		11.27		2.22
Class C Actual		1,000.00		1,249.60		16.84		2.97
Hypothetical (5% annual return before expenses)		1,000.00		1,010.23		15.05		2.97
Class Y Actual		1,000.00		1,257.10		11.38		2.00
Hypothetical (5% annual return before expenses)		1,000.00		1,015.12		10.16		2.00

*  Expenses are equal to the Fund's annualized net expense ratios, multiplied by the average account value over the period, multiplied by 184 divided by 365 (to reflect the one-half year period).

63

The UBS Funds

December 31, 2009 (unaudited)

	Beginning account value July 1, 2009		Ending account value December 31, 2009		Expenses paid during period* 07/01/09 – 12/31/09		Expense ratio during period
UBS U.S. Large Cap Equity Fund
Class A Actual	$	1,000.00	$	1,239.80	$	6.77		1.20	%
Hypothetical (5% annual return before expenses)		1,000.00		1,019.16		6.11		1.20
Class B Actual		1,000.00		1,235.30		10.99		1.95
Hypothetical (5% annual return before expenses)		1,000.00		1,015.38		9.91		1.95
Class C Actual		1,000.00		1,235.10		10.99		1.95
Hypothetical (5% annual return before expenses)		1,000.00		1,015.38		9.91		1.95
Class Y Actual		1,000.00		1,241.10		5.37		0.95
Hypothetical (5% annual return before expenses)		1,000.00		1,020.42		4.84		0.95
UBS U.S. Large Cap Value Equity Fund
Class A Actual		1,000.00		1,213.20		6.69		1.20
Hypothetical (5% annual return before expenses)		1,000.00		1,019.16		6.11		1.20
Class B Actual		1,000.00		1,207.40		10.85		1.95
Hypothetical (5% annual return before expenses)		1,000.00		1,015.38		9.91		1.95
Class C Actual		1,000.00		1,208.30		10.85		1.95
Hypothetical (5% annual return before expenses)		1,000.00		1,015.38		9.91		1.95
Class Y Actual		1,000.00		1,215.20		5.30		0.95
Hypothetical (5% annual return before expenses)		1,000.00		1,020.42		4.84		0.95
UBS U.S. Mid Cap Growth Equity Fund
Class A Actual		1,000.00		1,234.80		8.17		1.45
Hypothetical (5% annual return before expenses)		1,000.00		1,017.90		7.37		1.45
Class C Actual		1,000.00		1,230.80		12.37		2.20
Hypothetical (5% annual return before expenses)		1,000.00		1,014.12		11.17		2.20
Class Y Actual		1,000.00		1,236.80		6.77		1.20
Hypothetical (5% annual return before expenses)		1,000.00		1,019.16		6.11		1.20

64

The UBS Funds

December 31, 2009 (unaudited)

	Beginning account value July 1, 2009		Ending account value December 31, 2009		Expenses paid during period* 07/01/09 – 12/31/09		Expense ratio during period
UBS U.S. Small Cap Growth Fund
Class A Actual	$	1,000.00	$	1,229.00	$	7.87		1.40	%
Hypothetical (5% annual return before expenses)		1,000.00		1,018.15		7.12		1.40
Class B Actual		1,000.00		1,223.60		12.05		2.15
Hypothetical (5% annual return before expenses)		1,000.00		1,014.37		10.92		2.15
Class C Actual		1,000.00		1,222.90		12.05		2.15
Hypothetical (5% annual return before expenses)		1,000.00		1,014.37		10.92		2.15
Class Y Actual		1,000.00		1,230.30		6.46		1.15
Hypothetical (5% annual return before expenses)		1,000.00		1,019.41		5.85		1.15

65

The UBS Funds

Financial statements

Statement of assets and liabilities
December 31, 2009 (unaudited)

	UBS Global Equity Fund		UBS International Equity Fund		UBS U.S. Equity Alpha Fund		UBS U.S. Large Cap Equity Fund
Assets:
Investments, at cost:
Unaffiliated issuers	$	113,311,277	$	35,228,794	$	75,386,391	$	191,498,466
Affiliated issuers		63,307		4,208		177,546		5,662,064
Investments of cash collateral in affiliated issuers received from securities loaned, at cost		—		1,336,894		—		—
Foreign currency, at cost		626,183		170,681		—		—
	$	114,000,767	$	36,740,577	$	75,563,937	$	197,160,530
Investments, at value:
Unaffiliated issuers		147,423,171		52,646,014		91,537,862		235,462,138
Affiliated issuers		63,307		4,208		177,546		5,662,064
Investments of cash collateral in affiliated issuers received from securities loaned, at value1		—		1,336,894		—		—
Foreign currency, at value		628,226		171,766		—		—
Cash		193		1,402		1,614,066		—
Receivables:
Investment securities sold		1,558,737		3,645,901		5,016,875		47,666
Due from advisor		1,175		30,464		7,730		26,449
Dividends		438,177		64,316		115,760		208,261
Interest		59		3		134		592
Fund shares sold		210,863		13,285		1,950		155,387
Foreign tax reclaims		322,274		97,018		—		—
Cash collateral for futures contracts		—		—		—		225,000
Cash collateral for investments sold short		—		—		520,624		—
Unrealized appreciation on forward foreign currency contracts		711,775		325,565		—		—
Other assets		55,129		5,623		6,088		14,669
Total assets	$	151,413,086	$	58,342,459	$	98,998,635	$	241,802,226
Liabilities:
Payables:
Cash collateral from securities loaned		—		1,336,894		—		—
Investment securities purchased		31,932		1,453,051		3,280,643		73,092
Investment advisory and fund administration fees		82,366		43,661		69,418		159,015
Fund shares redeemed		1,973,295		558,543		3,907,654		613,720
Custody and fund accounting fees		14,061		11,960		11,075		17,044
Distribution and service fees		40,083		2,959		14,760		10,369
Dividends payable for investments sold short		—		—		9,890		—
Trustees' fees		7,045		5,597		6,655		8,520
Payable for bank loan		—		870,000		—		—
Variation margin		—		—		—		28,500
Accrued expenses		74,385		68,814		57,501		161,685
Investments sold short, at value2		—		—		17,596,192		—
Unrealized depreciation on forward foreign currency contracts		634,807		360,402		—		—
Total liabilities		2,857,974		4,711,881		24,953,788		1,071,945
Net assets	$	148,555,112	$	53,630,578	$	74,044,847	$	240,730,281

¹  The market value of securities loaned by UBS International Equity Fund and UBS U.S. Small Cap Growth Fund as of December 31, 2009 was $1,272,975 and $8,702,902, respectively.

²  Proceeds from investments sold short by UBS U.S. Equity Alpha Fund were $15,122,697.

66

The UBS Funds

Financial statements

	UBS U.S. Large Cap Value Equity Fund		UBS U.S. Mid Cap Growth Equity Fund		UBS U.S. Small Cap Growth Fund
Assets:
Investments, at cost:
Unaffiliated issuers	$	55,078,428	$	4,498,640	$	146,593,290
Affiliated issuers		429,699		61,660		3,695,023
Investments of cash collateral in affiliated issuers received from securities loaned, at cost		—		—		8,931,068
Foreign currency, at cost		—		—		—
	$	55,508,127	$	4,560,300	$	159,219,381
Investments, at value:
Unaffiliated issuers		56,513,536		5,180,871		178,978,559
Affiliated issuers		429,699		61,660		3,695,023
Investments of cash collateral in affiliated issuers received from securities loaned, at value1		—		—		8,931,068
Foreign currency, at value		—		—		—
Cash		—		—		1,025
Receivables:
Investment securities sold		392,766		—		1,505,812
Due from advisor		—		14,677		17,612
Dividends		52,538		2,331		23,115
Interest		111		10		3,338
Fund shares sold		3,003		—		367,283
Foreign tax reclaims		—		—		—
Cash collateral for futures contracts		—		—		—
Cash collateral for investments sold short		—		—		—
Unrealized appreciation on forward foreign currency contracts		—		—		—
Other assets		3,255		280		10,882
Total assets	$	57,394,908	$	5,259,829	$	193,533,717
Liabilities:
Payables:
Cash collateral from securities loaned		—		—		8,931,068
Investment securities purchased		—		—		1,668,328
Investment advisory and fund administration fees		19,431		4,005		143,563
Fund shares redeemed		99,894		—		1,005,514
Custody and fund accounting fees		6,805		6,806		12,097
Distribution and service fees		15,714		248		9,722
Dividends payable for investments sold short		—		—		—
Trustees' fees		5,207		4,424		7,238
Payable for bank loan		—		—		—
Variation margin		—		—		—
Accrued expenses		31,462		24,690		139,354
Investments sold short, at value2		—		—		—
Unrealized depreciation on forward foreign currency contracts		—		—		—
Total liabilities		178,513		40,173		11,916,884
Net assets	$	57,216,395	$	5,219,656	$	181,616,833

See accompanying notes to financial statements.
67

The UBS Funds

Financial statements

Statement of assets and liabilities (cont'd)
December 31, 2009 (unaudited)

	UBS Global Equity Fund			UBS International Equity Fund			UBS U.S. Equity Alpha Fund1			UBS U.S. Large Cap Equity Fund
Net assets consist of:
Beneficial interest	$	425,433,541		$	64,215,714		$	98,571,444		$	438,566,376
Accumulated undistributed net investment income (loss)		556,392			411,382			(36,502	)		832,571
Accumulated net realized loss		(311,658,875	)		(28,408,306	)		(38,168,071	)		(242,634,703	)
Net unrealized appreciation		34,224,054			17,411,788			13,677,976			43,966,037
Net assets	$	148,555,112		$	53,630,578		$	74,044,847		$	240,730,281
Class A:
Net assets	$	80,556,082		$	8,481,106		$	32,324,957		$	30,024,891
Shares outstanding		6,880,093			1,135,654			4,079,727			2,154,214
Net asset value and redemption proceeds per share	$	11.71		$	7.47		$	7.92		$	13.94
Offering price per share (NAV per share plus maximum sales charge)2	$	12.39		$	7.90		$	8.36		$	14.75
Class B:
Net assets	$	984,824		$	264,568		$	—		$	212,833
Shares outstanding		86,144			35,400			—			15,569
Net asset value and offering price per share	$	11.43		$	7.47			—		$	13.67
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	10.86		$	7.10			—		$	12.99
Class C:
Net assets	$	25,990,977		$	1,064,285		$	8,957,633		$	4,393,868
Shares outstanding		2,304,193			145,241			1,139,151			324,700
Net asset value and offering price per share	$	11.28		$	7.33		$	7.86		$	13.53
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	11.17		$	7.26		$	7.78		$	13.39
Class Y:
Net assets	$	41,023,229		$	43,820,619		$	32,762,257		$	206,098,689
Shares outstanding		3,415,874			5,848,653			4,137,386			14,670,457
Net asset value per share, offering price per share, and redemption proceeds per share	$	12.01		$	7.49		$	7.92		$	14.05

¹  UBS U.S. Mid Cap Growth Equity Fund and UBS U.S. Equity Alpha Fund do not offer Class B Shares.

²  For Class A, the maximum sales charge is 5.50%. Classes B, C and Y have no front-end sales charges. For Class A, the maximum contingent deferred sales charge of 1.00% of the shares' offering price or the net asset value at the time of sales by the shareholder, whichever is less, is charged on sales of shares on original purchases of $250,000 or more that were not subject to a front-end sales charge made within one year of the purchase date. For Class B, the maximum contingent deferred sales charge is 5.00%. Class C maximum contingent deferred sales charge is 1.00%. Class Y has no contingent deferred sales charge.

68

The UBS Funds

Financial statements

	UBS U.S. Large Cap Value Equity Fund			UBS U.S. Mid Cap Growth Equity Fund1			UBS U.S. Small Cap Growth Fund
Net assets consist of:
Beneficial interest	$	80,476,467		$	6,085,331		$	234,595,632
Accumulated undistributed net investment income (loss)		210,923			(17,128	)		(703,350	)
Accumulated net realized loss		(24,906,103	)		(1,530,778	)		(84,660,718	)
Net unrealized appreciation		1,435,108			682,231			32,385,269
Net assets	$	57,216,395		$	5,219,656		$	181,616,833
Class A:
Net assets	$	48,699,620		$	666,331		$	35,499,243
Shares outstanding		8,293,954			80,172			3,375,851
Net asset value and redemption proceeds per share	$	5.87		$	8.31		$	10.52
Offering price per share (NAV per share plus maximum sales charge)2	$	6.21		$	8.79		$	11.13
Class B:
Net assets	$	175,547			—		$	124,479
Shares outstanding		29,986			—			12,640
Net asset value and offering price per share	$	5.85			—		$	9.85
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	5.56			—		$	9.36
Class C:
Net assets	$	5,946,066		$	134,522		$	2,573,532
Shares outstanding		1,033,106			16,823			261,963
Net asset value and offering price per share	$	5.76		$	8.00		$	9.82
Redemption proceeds per share (NAV per share less maximum contingent deferred sales charge)2	$	5.70		$	7.92		$	9.72
Class Y:
Net assets	$	2,395,162		$	4,418,803		$	143,419,579
Shares outstanding		405,811			525,438			13,161,331
Net asset value per share, offering price per share, and redemption proceeds per share	$	5.90		$	8.41		$	10.90

See accompanying notes to financial statements.
69

The UBS Funds

Financial statements

Statement of operations
For the six months ended December 31, 2009 (unaudited)

	UBS Global Equity Fund			UBS International Equity Fund			UBS U.S. Equity Alpha Fund			UBS U.S. Large Cap Equity Fund
Investment income:
Dividends	$	1,295,542		$	533,988		$	1,245,101		$	2,162,581
Interest and other		467			—			—			—
Affiliated interest		1,650			1,548			1,001			4,224
Securities lending-net		10,477			11,170			—			—
Foreign tax withheld		(8,676	)		(17,818	)		—			—
Total income		1,299,460			528,888			1,246,102			2,166,805
Expenses:
Advisory and administration		685,761			304,757			645,731			1,032,804
Service and distribution:
Class A		100,305			10,565			42,414			42,956
Class B		5,737			1,259			—			1,135
Class C		126,286			5,277			47,119			22,995
Transfer agency and related service fees:
Class A		82,985			3,804			13,481			34,426
Class B		1,272			189			—			256
Class C		32,522			768			7,934			3,032
Class Y		27,559			67,239			27,752			147,699
Custodian and fund accounting		45,089			42,388			34,315			53,259
Federal and state registration		30,367			30,810			21,269			30,832
Professional services		51,779			50,161			47,285			45,601
Shareholder reports		33,223			12,457			21,191			40,697
Trustees		14,031			11,113			13,093			17,122
Dividend expense for investments sold short		—			—			275,875			—
Other		16,594			11,032			7,509			19,914
Total operating expenses		1,253,510			551,819			1,204,968			1,492,728
Fee waivers and/or expense reimbursements by Advisor		(13,436	)		(186,811	)		(88,994	)		(159,615	)
Net operating expenses		1,240,074			365,008			1,115,974			1,333,113
Interest expense		—			91			166,630			394
Net expenses		1,240,074			365,099			1,282,604			1,333,507
Net investment income (loss)		59,386			163,789			(36,502	)		833,298
Net realized gain (loss) on:
Investments in unaffiliated issuers		9,963,632			10,338,370			23,870,914			8,736,760
Investments in affiliated issuers		2,715,627			—			—			—
Futures contracts		—			—			—			191,230
Securities sold short		—			—			(1,773,315	)		—
Foreign currency transactions		753,373			135,960			—			—
Net realized gain (loss)		13,432,632			10,474,330			22,097,599			8,927,990
Change in net unrealized appreciation (depreciation) on:
Investments		25,124,740			3,711,044			9,371,371			48,512,213
Futures contracts		—			—			—			(5,693	)
Securities sold short		—			—			(1,988,953	)		—
Foreign forward currency contracts		648,247			201,055			—			—
Translation of other assets and liabilities denominated in foreign currency		10,121			3,970			—			—
Change in net unrealized appreciation		25,783,108			3,916,069			7,382,418			48,506,520
Net realized and unrealized gain		39,215,740			14,390,399			29,480,017			57,434,510
Net increase in net assets resulting from operations	$	39,275,126		$	14,554,188		$	29,443,515		$	58,267,808

70

The UBS Funds

Financial statements

	UBS U.S. Large Cap Value Equity Fund			UBS U.S. Mid Cap Growth Equity Fund			UBS U.S. Small Cap Growth Fund
Investment income:
Dividends	$	572,877		$	13,146		$	395,049
Interest and other		—			—			—
Affiliated interest		661			68			3,711
Securities lending-net		—			—			24,345
Foreign tax withheld		—			—			—
Total income		573,538			13,214			423,105
Expenses:
Advisory and administration		220,824			22,314			886,886
Service and distribution:
Class A		60,465			748			51,868
Class B		1,147			—			743
Class C		30,049			642			12,934
Transfer agency and related service fees:
Class A		36,006			1,102			79,912
Class B		527			—			615
Class C		6,136			438			5,925
Class Y		3,483			41			122,220
Custodian and fund accounting		20,745			20,505			36,800
Federal and state registration		21,096			16,893			24,494
Professional services		48,395			44,341			44,341
Shareholder reports		12,752			2,666			30,560
Trustees		10,472			8,902			14,587
Dividend expense for investments sold short		—			—			—
Other		6,074			3,574			12,326
Total operating expenses		478,171			122,166			1,324,211
Fee waivers and/or expense reimbursements by Advisor		(115,970	)		(91,824	)		(156,008	)
Net operating expenses		362,201			30,342			1,168,203
Interest expense		—			—			77
Net expenses		362,201			30,342			1,168,280
Net investment income (loss)		211,337			(17,128	)		(745,175	)
Net realized gain (loss) on:
Investments in unaffiliated issuers		(1,991,934	)		46,485			2,575,614
Investments in affiliated issuers		—			—			—
Futures contracts		—			—			—
Securities sold short		—			—			—
Foreign currency transactions		—			—			—
Net realized gain (loss)		(1,991,934	)		46,485			2,575,614
Change in net unrealized appreciation (depreciation) on:
Investments		12,485,267			965,869			37,003,808
Futures contracts		—			—			—
Securities sold short		—			—			—
Foreign forward currency contracts		—			—			—
Translation of other assets and liabilities denominated in foreign currency		—			—			—
Change in net unrealized appreciation		12,485,267			965,869			37,003,808
Net realized and unrealized gain		10,493,333			1,012,354			39,579,422
Net increase in net assets resulting from operations	$	10,704,670		$	995,226		$	38,834,247

See accompanying notes to financial statements.
71

The UBS Funds

Financial statements

Statement of changes in net assets

	UBS Global Equity Fund						UBS International Equity Fund
	Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009			Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009
Operations:
Net investment income (loss)	$	59,386		$	2,199,037		$	163,789		$	(1,659,840	)
Net realized gain (loss)		13,432,632			(69,569,439	)		10,474,330			(35,631,181	)
Change in net unrealized appreciation (depreciation)		25,783,108			(18,101,984	)		3,916,069			(10,960,573	)
Net increase (decrease) in net assets from operations		39,275,126			(85,472,386	)		14,554,188			(44,931,914	)
Dividends and distributions to shareholders by class:
Class A:
Net investment income and net foreign currency gains		(1,823,227	)		(4,842,626	)		(502,754	)		(231,657	)
Net realized gain		—			—			—			(760,618	)
Total Class A dividends and distributions		(1,823,227	)		(4,842,626	)		(502,754	)		(992,275	)
Class B:
Net investment income and net foreign currency gains		(16,105	)		(128,499	)		(14,771	)		—
Net realized gain		—			—			—			(6,885	)
Total Class B dividends and distributions		(16,105	)		(128,499	)		(14,771	)		(6,885	)
Class C:
Net investment income and net foreign currency gains		(531,429	)		(1,311,744	)		(58,439	)		(11,121	)
Net realized gain		—			—			—			(94,172	)
Total Class C dividends and distributions		(531,429	)		(1,311,744	)		(58,439	)		(105,293	)
Class Y:
Net investment income and net foreign currency gains		(1,055,564	)		(6,370,482	)		(2,971,270	)		(2,441,800	)
Net realized gain		—			—			—			(6,407,652	)
Total Class Y dividends and distributions		(1,055,564	)		(6,370,482	)		(2,971,270	)		(8,849,452	)
Decrease in net assets from dividends and distributions		(3,426,325	)		(12,653,351	)		(3,547,234	)		(9,953,905	)
Beneficial interest transactions:
Proceeds from shares sold		3,364,603			37,961,057			3,731,059			46,338,330
Shares issued on reinvestment of dividends and distributions		3,259,302			12,106,041			3,488,259			9,877,838
Cost of shares redeemed		(56,616,611	)		(110,911,845	)		(40,202,977	)		(74,614,879	)
Redemption fees		595			47,416			1,522			21,033
Net increase (decrease) in net assets resulting from beneficial interest transactions		(49,992,111	)		(60,797,331	)		(32,982,137	)		(18,377,678	)
Increase (decrease) in net assets		(14,143,310	)		(158,923,068	)		(21,975,183	)		(73,263,497	)
Net assets, beginning of period		162,698,422			321,621,490			75,605,761			148,869,258
Net assets, end of period	$	148,555,112		$	162,698,422		$	53,630,578		$	75,605,761
Net assets include accumulated undistributed (distributions in excess of) net investment income	$	556,392		$	3,923,331		$	411,382		$	3,794,827

72

The UBS Funds

Financial statements

	UBS U.S. Equity Alpha Fund						UBS U.S. Large Cap Equity Fund
	Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009			Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009
Operations:
Net investment income (loss)	$	(36,502	)	$	325,175		$	833,298		$	5,953,983
Net realized gain (loss)		22,097,599			(55,013,005	)		8,927,990			(235,188,832	)
Change in net unrealized appreciation (depreciation)		7,382,418			29,628,558			48,506,520			19,293,729
Net increase (decrease) in net assets from operations		29,443,515			(25,059,272	)		58,267,808			(209,941,120	)
Dividends and distributions to shareholders by class:
Class A:
Net investment income and net foreign currency gains		—			(576,077	)		(615,929	)		(305,532	)
Net realized gain		—			—			—			(1,595,416	)
Total Class A dividends and distributions		—			—			(615,929	)		(1,900,948	)
Class B:
Net investment income and net foreign currency gains		—			—			(1,397	)		(623	)
Net realized gain		—			—			—			(13,791	)
Total Class B dividends and distributions		—			—			(1,397	)		(14,414	)
Class C:
Net investment income and net foreign currency gains		—			—			(72,171	)		(12,672	)
Net realized gain		—			—			—			(163,602	)
Total Class C dividends and distributions		—			—			(72,171	)		(176,274	)
Class Y:
Net investment income and net foreign currency gains		—			(110,609	)		(5,270,317	)		(3,820,205	)
Net realized gain		—			—			—			(12,193,390	)
Total Class Y dividends and distributions		—			—			(5,270,317	)		(16,013,595	)
Decrease in net assets from dividends and distributions		—			(686,686	)		(5,959,814	)		(18,105,231	)
Beneficial interest transactions:
Proceeds from shares sold		6,545,181			117,825,079			13,104,241			93,811,450
Shares issued on reinvestment of dividends and distributions		—			666,293			5,904,189			17,806,087
Cost of shares redeemed		(99,888,272	)		(80,103,113	)		(87,813,473	)		(369,797,169	)
Redemption fees		0			13,594			16,555			58,778
Net increase (decrease) in net assets resulting from beneficial interest transactions		(93,343,091	)		38,401,853			(68,788,488	)		(258,120,854	)
Increase (decrease) in net assets		(63,899,576	)		12,655,895			(16,480,494	)		(486,167,205	)
Net assets, beginning of period		137,944,423			125,288,528			257,210,775			743,377,980
Net assets, end of period	$	74,044,847		$	137,944,423		$	240,730,281		$	257,210,775
Net assets include accumulated undistributed (distributions in excess of) net investment income	$	(36,502	)	$	—		$	832,571		$	5,959,087

See accompanying notes to financial statements.
73

The UBS Funds

Financial statements

Statement of changes in net assets (cont'd)

	UBS U.S. Large Cap Value Equity Fund						UBS U.S. Mid Cap Growth Equity Fund
	Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009			Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009
Operations:
Net investment income (loss)	$	211,337		$	1,136,742		$	(17,128	)	$	(30,471	)
Net realized gain (loss)		(1,991,934	)		(21,689,579	)		46,485			(1,483,122	)
Change in net unrealized appreciation (depreciation)		12,485,267			(6,462,189	)		965,869			(362,083	)
Net increase (decrease) in net assets from operations		10,704,670			(27,015,026	)		995,226			(1,875,676	)
Dividends and distributions to shareholders by class:
Class A:
Net investment income and net foreign currency gains		(1,002,633	)		(516,748	)		—			—
Net realized gain		—			(7,453,614	)		—			(9,595	)
Total Class A dividends and distributions		(1,002,633	)		(7,970,362	)		—			(9,595	)
Class B:
Net investment income and net foreign currency gains		(896	)		(2,141	)		—			—
Net realized gain		—			(60,577	)		—			—
Total Class B dividends and distributions		(896	)		(62,718	)		—			—
Class C:
Net investment income and net foreign currency gains		(78,334	)		(22,232	)		—			—
Net realized gain		—			(925,371	)		—			(2,082	)
Total Class C dividends and distributions		(78,334	)		(947,603	)		—			(2,082	)
Class Y:
Net investment income and net foreign currency gains		(54,617	)		(27,994	)		—			—
Net realized gain		—			(332,468	)		—			(65,030	)
Total Class Y dividends and distributions		(54,617	)		(360,462	)		—			(65,030	)
Decrease in net assets from dividends and distributions		(1,136,480	)		(9,341,145	)		—			(76,707	)
Beneficial interest transactions:
Proceeds from shares sold		465,476			1,979,114			146,533			328,613
Shares issued on reinvestment of dividends and distributions		1,014,890			8,347,989			—			76,709
Cost of shares redeemed		(5,633,164	)		(17,119,519	)		(121,287	)		(166,889	)
Redemption fees		103			1,154			—			3
Net increase (decrease) in net assets resulting from beneficial interest transactions		(4,152,695	)		(6,791,262	)		25,246			238,436
Increase (decrease) in net assets		5,415,495			(43,147,433	)		1,020,472			(1,713,947	)
Net assets, beginning of period		51,800,900			94,948,333			4,199,184			5,913,131
Net assets, end of period	$	57,216,395		$	51,800,900		$	5,219,656		$	4,199,184
Net assets include accumulated undistributed net investment income (loss)	$	210,923		$	1,136,066		$	(17,128	)	$	—

74

The UBS Funds

Financial statements

	UBS U.S. Small Cap Growth Fund
	Six months ended December 31, 2009 (unaudited)			Year ended June 30, 2009
Operations:
Net investment income (loss)	$	(745,175	)	$	(961,914	)
Net realized gain (loss)		2,575,614			(87,081,406	)
Change in net unrealized appreciation (depreciation)		37,003,808			(36,741,700	)
Net increase (decrease) in net assets from operations		38,834,247			(124,785,020	)
Dividends and distributions to shareholders by class:
Class A:
Net investment income and net foreign currency gains		—			—
Net realized gain		—			(3,056	)
Total Class A dividends and distributions		—			(3,056	)
Class B:
Net investment income and net foreign currency gains		—			—
Net realized gain		—			(19	)
Total Class B dividends and distributions		—			(19	)
Class C:
Net investment income and net foreign currency gains		—			—
Net realized gain		—			(187	)
Total Class C dividends and distributions		—			(187	)
Class Y:
Net investment income and net foreign currency gains		—			—
Net realized gain		—			(8,114	)
Total Class Y dividends and distributions		—			(8,114	)
Decrease in net assets from dividends and distributions		—			(11,376	)
Beneficial interest transactions:
Proceeds from shares sold		13,982,210			50,736,468
Shares issued on reinvestment of dividends and distributions		—			10,729
Cost of shares redeemed		(49,377,966	)		(119,932,435	)
Redemption fees		10,766			21,887
Net increase (decrease) in net assets resulting from beneficial interest transactions		(35,384,990	)		(69,163,351	)
Increase (decrease) in net assets		3,449,257			(193,959,747	)
Net assets, beginning of period		178,167,576			372,127,323
Net assets, end of period	$	181,616,833		$	178,167,576
Net assets include accumulated undistributed net investment income (loss)	$	(703,350	)	$	41,825

See accompanying notes to financial statements.
75

UBS Global Equity Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	9.46		$	13.54		$	15.47		$	12.99		$	11.63		$	10.51
Income (loss) from investment operations:
Net investment income (loss)1		0.002			0.10			0.15			0.13			0.11			0.15
Net realized and unrealized gain (loss) from investment activities		2.52			(3.57	)		(2.08	)		2.47			1.32			0.97
Total income (loss) from investment operations		2.52			(3.47	)		(1.93	)		2.60			1.43			1.12
Less dividends/distributions:
From net investment income		(0.27	)		(0.61	)		—			(0.12	)		(0.07	)		—
Total dividends/distributions		(0.27	)		—			—			(0.12	)		(0.07	)		—
Net asset value, end of period	$	11.71		$	9.46		$	13.54		$	15.47		$	12.99		$	11.63
Total investment return2		26.65	%		(24.86	)%		(12.48	)%		20.11	%		12.35	%		10.66	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	80,556		$	72,280		$	117,601		$	168,208		$	173,052		$	109,998
Ratio of expenses to average net assets:
Before expense reimbursement		1.51	%3		1.48	%		1.31	%		1.35	%		1.37	%		1.39	%
After expense reimbursement		1.50	%3		1.25	%		1.25	%		1.25	%		1.25	%		1.25	%
Ratio of net investment income (loss) to average net assets		0.07	%3		1.10	%		0.98	%		0.91	%		0.88	%		1.35	%
Portfolio turnover rate		48	%		76	%		66	%		32	%		48	%		37	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	9.22		$	13.13		$	15.11		$	12.69		$	11.39		$	10.37
Income (loss) from investment operations:
Net investment income (loss)1		(0.04	)		0.02			0.02			0.01			0.02			0.07
Net realized and unrealized gain (loss) from investment activities		2.44			(3.43	)		(2.00	)		2.43			1.28			0.95
Total income (loss) from investment operations		2.40			(3.41	)		(1.98	)		2.44			1.30			1.02
Less dividends/distributions:
From net investment income		(0.19	)		(0.50	)		—			(0.02	)		—			—
Total dividends/distributions		(0.19	)		—			—			—			—			—
Net asset value, end of period	$	11.43		$	9.22		$	13.13		$	15.11		$	12.69		$	11.39
Total investment return2		26.17	%		(25.39	)%		(13.10	)%		19.25	%		11.41	%		9.84	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	985		$	1,254		$	3,814		$	7,439		$	13,672		$	108,894
Ratio of expenses to average net assets:
Before expense reimbursement		2.28	%3		2.25	%		2.05	%		2.17	%		2.35	%		2.22	%
After expense reimbursement		2.25	%3		2.00	%		2.00	%		2.00	%		2.00	%		2.00	%
Ratio of net investment income (loss) to average net assets		(0.70	)%3		0.26	%		0.17	%		0.10	%		0.13	%		0.60	%
Portfolio turnover rate		48	%		76	%		66	%		32	%		48	%		37	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Annualized.

⁴  The investment manager recouped expenses previously reimbursed by the manager on behalf of the Fund, not to exceed the expense cap.

76

UBS Global Equity Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	9.13		$	13.05		$	15.02		$	12.65		$	11.35		$	10.33
Income (loss) from investment operations:
Net investment income (loss)1		(0.04	)		0.03			0.03			0.02			0.02			0.06
Net realized and unrealized gain (loss) from investment activities		2.42			(3.44	)		(2.00	)		2.42			1.28			0.96
Total income (loss) from investment operations		2.38			(3.41	)		(1.97	)		2.44			1.30			1.02
Less dividends/distributions:
From net investment income		(0.23	)		(0.51	)		—			(0.07	)		—			—
Total dividends/distributions		(0.23	)		—			—			—			—			—
Net asset value, end of period	$	11.28		$	9.13		$	13.05		$	15.02		$	12.65		$	11.35
Total investment return2		26.16	%		(25.46	)%		(13.12	)%		19.28	%		11.45	%		9.87	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	25,991		$	22,519		$	35,900		$	52,378		$	56,836		$	68,735
Ratio of expenses to average net assets:
Before expense reimbursement		2.31	%3		2.30	%		2.11	%		2.14	%		2.20	%		2.20	%
After expense reimbursement		2.25	%3		2.00	%		2.00	%		2.00	%		2.00	%		2.00	%
Ratio of net investment income (loss) to average net assets		(0.68	)%3		0.34	%		0.23	%		0.16	%		0.13	%		0.60	%
Portfolio turnover rate		48	%		76	%		66	%		32	%		48	%		37	%
	Class Y
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	9.69		$	13.84		$	15.78		$	13.23		$	11.83		$	10.67
Income (loss) from investment operations:
Net investment income (loss)1		0.02			0.13			0.19			0.17			0.15			0.18
Net realized and unrealized gain (loss) from investment activities		2.58			(3.63	)		(2.13	)		2.52			1.34			0.98
Total income (loss) from investment operations		2.60			(3.50	)		(1.94	)		2.69			1.49			1.16
Less dividends/distributions:
From net investment income		(0.28	)		(0.65	)		—			(0.14	)		(0.09	)		—
Total dividends/distributions		(0.28	)		—			—			—			—			—
Net asset value, end of period	$	12.01		$	9.69		$	13.84		$	15.78		$	13.23		$	11.83
Total investment return2		26.77	%		(24.52	)%		(12.29	)%		20.44	%		12.67	%		10.87	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	41,023		$	66,646		$	164,307		$	180,027		$	180,990		$	159,252
Ratio of expenses to average net assets:
Before expense reimbursement		1.15	%3		1.08	%		0.96	%		0.99	%		0.99	%		1.04	%
After expense reimbursement		1.15	%3		1.00	%		1.00	%4		0.99	%		0.99	%		1.00	%
Ratio of net investment income (loss) to average net assets		0.31	%3		1.27	%		1.29	%		1.16	%		1.14	%		1.60	%
Portfolio turnover rate		48	%		76	%		66	%		32	%		48	%		37	%

See accompanying notes to financial statements.
77

UBS International Equity Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	6.48		$	9.97		$	12.99		$	10.98		$	9.48		$	8.58
Income (loss) from investment operations:
Net investment income (loss)1		0.01			0.10			0.17			0.17			0.16			0.15
Net realized and unrealized gain (loss) from investment activities		1.44			(2.89	)		(1.83	)		2.47			1.81			0.86
Total income (loss) from investment operations		1.45			(2.79	)		(1.66	)		2.64			1.97			1.01
Less dividends/distributions:
From net investment income		(0.46	)		(0.16	)		(0.20	)		(0.11	)		(0.10	)		(0.11	)
From net realized gains		—			(0.54	)		(1.16	)		(0.52	)		(0.37	)		—
Total dividends/distributions		(0.46	)		(0.70	)		(1.36	)		(0.63	)		(0.47	)		(0.11	)
Net asset value, end of period	$	7.47		$	6.48		$	9.97		$	12.99		$	10.98		$	9.48
Total investment return2		22.61	%		(26.75	)%		(13.93	)%		24.84	%		20.93	%		11.73	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	8,481		$	7,809		$	17,023		$	26,564		$	23,539		$	15,168
Ratio of expenses to average assets:
Before expense reimbursement		1.67	%4		1.57	%		1.32	%		1.38	%3		1.48	%		1.68	%
After expense reimbursement		1.25	%4		1.25	%		1.25	%		1.26	%3		1.25	%		1.25	%
Ratio of net investment income (loss) to average net assets		0.26	%4		1.50	%		1.43	%		1.42	%		1.52	%		1.61	%
Portfolio turnover rate		35	%		124	%		55	%		72	%		69	%		71	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	6.49		$	9.79		$	12.81		$	10.82		$	9.34		$	8.48
Income (loss) from investment operations:
Net investment income (loss)1		(0.02	)		0.06			0.08			0.06			0.08			0.08
Net realized and unrealized gain (loss) from investment activities		1.44			(2.82	)		(1.79	)		2.46			1.77			0.85
Total income (loss) from investment operations		1.42			(2.76	)		(1.71	)		2.52			1.85			0.93
Less dividends/distributions:
From net investment income		(0.44	)		—			(0.15	)		(0.01	)		—			(0.07	)
From net realized gains		—			(0.54	)		(1.16	)		(0.52	)		(0.37	)		—
Total dividends/distributions		(0.44	)		(0.54	)		(1.31	)		(0.53	)		(0.37	)		(0.07	)
Net asset value, end of period	$	7.47		$	6.49		$	9.79		$	12.81		$	10.82		$	9.34
Total investment return2		22.07	%		(27.30	)%		(14.55	)%		23.97	%		19.86	%		10.92	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	265		$	218		$	324		$	555		$	732		$	876
Ratio of expenses to average assets:
Before expense reimbursement		2.48	%4		2.52	%		2.25	%		2.25	%3		2.22	%		2.25	%
After expense reimbursement		2.00	%4		2.00	%		2.00	%		2.01	%3		2.00	%		2.00	%
Ratio of net investment income (loss) to average net assets		(0.49	)%4		0.93	%		0.67	%		0.51	%		0.77	%		0.86	%
Portfolio turnover rate		35	%		124	%		55	%		72	%		69	%		71	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Includes interest expense of 0.01%.

⁴  Annualized.

78

UBS International Equity Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	6.34		$	9.69		$	12.71		$	10.76		$	9.30		$	8.45
Income (loss) from investment operations:
Net investment income (loss)1		(0.02	)		0.05			0.09			0.08			0.08			0.08
Net realized and unrealized gain (loss) from investment activities		1.42			(2.80	)		(1.79	)		2.42			1.77			0.85
Total income (loss) from investment operations		1.40			(2.75	)		(1.70	)		2.50			1.85			0.93
Less dividends/distributions:
From net investment income		(0.41	)		(0.06	)		(0.16	)		(0.03	)		(0.02	)		(0.08	)
From net realized gains		—			(0.54	)		(1.16	)		(0.52	)		(0.37	)		—
Total dividends/distributions		(0.41	)		(0.60	)		(1.32	)		(0.55	)		(0.39	)		(0.08	)
Net asset value, end of period	$	7.33		$	6.34		$	9.69		$	12.71		$	10.76		$	9.30
Total investment return2		22.20	%		(27.33	)%		(14.51	)%		23.85	%		19.93	%		10.97	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	1,064		$	914		$	1,949		$	2,576		$	2,412		$	1,816
Ratio of expenses to average assets:
Before expense reimbursement		2.47	%4		2.38	%		2.13	%		2.16	%3		2.17	%		2.16	%
After expense reimbursement		2.00	%4		2.00	%		2.00	%		2.01	%3		2.01	%		2.00	%
Ratio of net investment income (loss) to average net assets		(0.49	)%4		0.75	%		0.75	%		0.66	%		0.77	%		0.86	%
Portfolio turnover rate		35	%		124	%		55	%		72	%		69	%		71	%
	Class Y
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	6.51		$	10.05		$	13.07		$	11.04		$	9.55		$	8.63
Income (loss) from investment operations:
Net investment income (loss)1		0.02			0.12			0.21			0.20			0.19			0.17
Net realized and unrealized gain (loss) from investment activities		1.45			(2.91	)		(1.85	)		2.49			1.79			0.86
Total income (loss) from investment operations		1.47			(2.79	)		(1.64	)		2.69			1.98			1.03
Less dividends/distributions:
From net investment income		(0.49	)		(0.21	)		(0.22	)		(0.14	)		(0.12	)		(0.11	)
From net realized gains		—			(0.54	)		(1.16	)		(0.52	)		(0.37	)		—
Total dividends/distributions		(0.49	)		(0.75	)		(1.38	)		(0.66	)		(0.49	)		(0.11	)
Net asset value, end of period	$	7.49		$	6.51		$	10.05		$	13.07		$	11.04		$	9.55
Total investment return2		22.70	%		(26.62	)%		(13.63	)%		24.83	%		21.22	%		11.97	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	43,821		$	66,665		$	129,573		$	172,150		$	147,397		$	113,264
Ratio of expenses to average assets:
Before expense reimbursement		1.55	%4		1.42	%		1.13	%		1.16	%3		1.19	%		1.18	%
After expense reimbursement		1.00	%4		1.00	%		1.00	%		1.01	%3		1.00	%		1.00	%
Ratio of net investment income (loss) to average net assets		0.52	%4		1.81	%		1.79	%		1.63	%		1.77	%		1.86	%
Portfolio turnover rate		35	%		124	%		55	%		72	%		69	%		71	%

See accompanying notes to financial statements.
79

UBS U.S. Equity Alpha Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,						For the period ended June 30,
	(unaudited)			2009			2008			20075
Net asset value, beginning of period	$	6.31		$	8.82		$	11.55		$	10.00
Income (loss) from investment operations:
Net investment income (loss)1		(0.00	)2		0.04			0.05			0.02
Net realized and unrealized gain (loss) from investment activities		1.61			(2.48	)		(2.10	)		1.55
Total income (loss) from investment operations		1.61			(2.44	)		(2.05	)		1.57
Less dividends/distributions:
From net investment income		—			(0.07	)		(0.03	)		(0.01	)
From net realized gains		—			—			(0.65	)		(0.01	)
Total dividends/distributions		—			(0.07	)		(0.68	)		(0.02	)
Net asset value, end of period	$	7.92		$	6.31		$	8.82		$	11.55
Total investment return3		25.52	%		(27.52	)%		(18.49	)%		15.73	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	32,325		$	33,137		$	93,344		$	187,444
Ratio of expenses to average net assets:
Before expense reimbursement/recoupment and after interest and dividend expense for securities sold short		2.37	%4		2.47	%		1.93	%		1.93	%4
After expense reimbursement/recoupment and interest and dividend expense for securities sold short		2.22	%4		2.24	%		1.93	%		1.88	%4
After expense reimbursement/recoupment and before interest and dividend expense for securities sold short		1.50	%4		1.50	%		1.50	%		1.50	%4
Ratio of net investment income (loss) to average net assets		(0.07	)%4		0.63	%		0.47	%		0.30	%4
Portfolio turnover rate		74	%		154	%		72	%		81	%

	Class Y
	Six months ended December 31, 2009			Year ended June 30,						For the period ended June 30,
	(unaudited)			2009			2008			20075
Net asset value, beginning of period	$	6.30		$	8.82		$	11.55		$	10.00
Income (loss) from investment operations:
Net investment income (loss)1		(0.00	)2		0.002			0.08			0.04
Net realized and unrealized gain (loss) from investment activities		1.62			(2.41	)		(2.10	)		1.54
Total income (loss) from investment operations		1.62			(2.41	)		(2.02	)		1.58
Less dividends/distributions:
From net investment income		—			(0.11	)		(0.06	)		(0.02	)
From net realized gains		—			—			(0.65	)		(0.01	)
Total dividends/distributions		—			(0.11	)		(0.71	)		(0.03	)
Net asset value, end of period	$	7.92		$	6.30		$	8.82		$	11.55
Total investment return3		25.71	%		(27.22	)%		(18.34	)%		15.88	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	32,762		$	95,804		$	9,121		$	5,405
Ratio of expenses to average net assets:
Before expense reimbursement/recoupment and after interest and dividend expense for securities sold short		2.13	%4		2.33	%		1.70	%		1.67	%4
After expense reimbursement/recoupment and interest and dividend expense for securities sold short		2.00	%4		2.25	%		1.70	%		1.67	%4
After expense reimbursement/recoupment and before interest and dividend expense for securities sold short		1.25	%4		1.25	%		1.25	%		1.25	%4
Ratio of net investment income (loss) to average net assets		(0.04	)%4		0.07	%		0.74	%		0.43	%4
Portfolio turnover rate		74	%		154	%		72	%		81	%

¹  Calculated using the average shares method.

²  Amount represents less than $0.005 per share.

³  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

⁴  Annualized.

⁵  For the period September 26, 2006 (commencement of issuance) through June 30, 2007.

80

UBS U.S. Equity Alpha Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,						For the period ended June 30,
	(unaudited)			2009			2008			20075
Net asset value, beginning of period	$	6.29		$	8.74		$	11.50		$	10.00
Income (loss) from investment operations:
Net investment income (loss)1		(0.01	)		(0.01	)		(0.03	)		(0.04	)
Net realized and unrealized gain (loss) from investment activities		1.58			(2.44	)		(2.08	)		1.55
Total income (loss) from investment operations		1.57			(2.45	)		(2.11	)		1.51
Less dividends/distributions:
From net investment income		—			—			—			—
From net realized gains		—			—			(0.65	)		(0.01	)
Total dividends/distributions		—			—			(0.65	)		(0.01	)
Net asset value, end of period	$	7.86		$	6.29		$	8.74		$	11.50
Total investment return3		24.96	%		(28.03	)%		(19.11	)%		15.12	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	8,958		$	9,003		$	22,823		$	42,750
Ratio of expenses to average net assets:
Before expense reimbursement/recoupment and after interest and dividend expense for securities sold short		3.21	%4		3.30	%		2.74	%		2.72	%4
After expense reimbursement/recoupment and interest and dividend expense for securities sold short		2.97	%4		2.99	%		2.68	%		2.64	%4
After expense reimbursement/recoupment and before interest and dividend expense for securities sold short		2.25	%4		2.25	%		2.25	%		2.25	%4
Ratio of net investment income (loss) to average net assets		(0.16	)%4		(0.12	)%		(0.28	)%		(0.44	)%4
Portfolio turnover rate		74	%		154	%		72	%		81	%

See accompanying notes to financial statements.
81

UBS U.S. Large Cap Equity Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	11.48		$	16.63		$	21.19		$	18.24		$	17.27		$	16.08
Income (loss) from investment operations:
Net investment income (loss)1		0.03			0.13			0.16			0.15			0.10			0.15
Net realized and unrealized gain (loss) from investment activities		2.72			(4.84	)		(3.68	)		3.52			1.39			1.63
Total income (loss) from investment operations		2.75			(4.71	)		(3.52	)		3.67			1.49			1.78
Less dividends/distributions:
From net investment income		(0.29	)		(0.07	)		(0.16	)		(0.10	)		(0.11	)		(0.11	)
From net realized gains		—			(0.37	)		(0.88	)		(0.62	)		(0.41	)		(0.48	)
Total dividends/distributions		(0.29	)		(0.44	)		(1.04	)		(0.72	)		(0.52	)		(0.59	)
Net asset value, end of period	$	13.94		$	11.48		$	16.63		$	21.19		$	18.24		$	17.27
Total investment return2		23.98	%		(28.04	)%		(17.17	)%		20.39	%		8.62	%		11.10	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	30,025		$	34,406		$	90,558		$	158,138		$	88,968		$	25,669
Ratio of expenses to average net assets:
Before expense reimbursement		1.38	%3		1.28	%		1.16	%		1.18	%		1.20	%		1.14	%
After expense reimbursement/recoupment		1.20	%3		1.28	%		1.16	%		1.18	%		1.24	%5		1.14	%
Ratio of net investment income (loss) to average net assets		0.43	%3		1.05	%		0.83	%		0.75	%		0.54	%		0.89	%
Portfolio turnover rate		23	%		62	%		47	%		34	%		50	%		32	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	11.14		$	16.20		$	20.66		$	17.84		$	16.94		$	15.81
Income (loss) from investment operations:
Net investment income (loss)1		(0.02	)		0.04			0.01			0.004			(0.04	)		0.004
Net realized and unrealized gain (loss) from investment activities		2.64			(4.71	)		(3.58	)		3.44			1.35			1.61
Total income (loss) from investment operations		2.62			(4.67	)		(3.57	)		3.44			1.31			1.61
Less dividends/distributions:
From net investment income		(0.09	)		(0.02	)		(0.01	)		—			—			—
From net realized gains		—			(0.37	)		(0.88	)		(0.62	)		(0.41	)		(0.48	)
Total dividends/distributions		(0.09	)		(0.39	)		(0.89	)		(0.62	)		(0.41	)		(0.48	)
Net asset value, end of period	$	13.67		$	11.14		$	16.20		$	20.66		$	17.84		$	16.94
Total investment return2		23.53	%		(28.61	)%		(17.79	)%		19.50	%		7.73	%		10.19	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	213		$	265		$	635		$	870		$	989		$	1,018
Ratio of expenses to average net assets:
Before expense reimbursement		2.16	%3		2.02	%		1.93	%		1.95	%		1.92	%		2.02	%
After expense reimbursement/recoupment		1.95	%3		2.02	%		1.93	%		1.95	%		2.01	%5		2.02	%
Ratio of net investment income (loss) to average net assets		(0.32	)%3		0.33	%		0.07	%		(0.01	)%		(0.23	)%		0.01	%
Portfolio turnover rate		23	%		62	%		47	%		34	%		50	%		32	%

¹  Calculated using the average shares method.

²  Total investment return is calculated assuming a $10,000 investment on the first day of each period reported, reinvestment of all dividends and distributions, if any, at net asset value on the ex-dividend dates, and a sale at net asset value on the last day of each period reported. The figures do not include any applicable sales charges; results would be lower if they were included. Total investment return for periods of less than one year has not been annualized. Returns do not reflect the deduction of taxes that a shareholder would pay on dividends/distributions or the redemption of Fund shares.

³  Annualized.

⁴  Amount represents less than $0.005 per share.

⁵  The investment manager recouped expenses previously reimbursed by the investment manager on behalf of the Fund, not to exceed the expense cap.

82

UBS U.S. Large Cap Equity Fund

Financial highlights

	Class C
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	11.14		$	16.21		$	20.66		$	17.83		$	16.93		$	15.80
Income (loss) from investment operations:
Net investment income (loss)1		(0.02	)		0.04			0.02			0.004			(0.04	)		0.01
Net realized and unrealized gain (loss) from investment activities		2.64			(4.71	)		(3.59	)		3.45			1.36			1.60
Total income (loss) from investment operations		2.62			(4.67	)		(3.57	)		3.45			1.32			1.61
Less dividends/distributions:
From net investment income		(0.23	)		(0.03	)		—			—			(0.01	)		—
From net realized gains		—			(0.37	)		(0.88	)		(0.62	)		(0.41	)		(0.48	)
Total dividends/distributions		(0.23	)		(0.40	)		(0.88	)		(0.62	)		(0.42	)		(0.48	)
Net asset value, end of period	$	13.53		$	11.14		$	16.21		$	20.66		$	17.83		$	16.93
Total investment return2		23.51	%		(28.57	)%		(17.76	)%		19.56	%		7.79	%		10.20	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	4,394		$	4,719		$	6,382		$	10,591		$	5,977		$	2,423
Ratio of expenses to average net assets:
Before expense reimbursement		2.06	%3		1.96	%		1.91	%		1.92	%		1.96	%		1.95	%
After expense reimbursement/recoupment		1.95	%3		1.96	%		1.91	%		1.92	%		1.98	%5		1.95	%
Ratio of net investment income (loss) to average net assets		(0.33	)%3		0.35	%		0.09	%		0.01	%		(0.20	)%		0.08	%
Portfolio turnover rate		23	%		62	%		47	%		34	%		50	%		32	%
	Class Y
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	11.62		$	16.85		$	21.44		$	18.43		$	17.42		$	16.21
Income (loss) from investment operations:
Net investment income (loss)1		0.05			0.17			0.22			0.21			0.15			0.19
Net realized and unrealized gain (loss) from investment activities		2.75			(4.91	)		(3.72	)		3.56			1.40			1.65
Total income (loss) from investment operations		2.80			(4.74	)		(3.50	)		3.77			1.55			1.84
Less dividends/distributions:
From net investment income		(0.37	)		(0.12	)		(0.21	)		(0.14	)		(0.13	)		(0.15	)
From net realized gains		—			(0.37	)		(0.88	)		(0.62	)		(0.41	)		(0.48	)
Total dividends/distributions		(0.37	)		(0.49	)		(1.09	)		(0.76	)		(0.54	)		(0.63	)
Net asset value, end of period	$	14.05		$	11.62		$	16.85		$	21.44		$	18.43		$	17.42
Total investment return2		24.11	%		(27.85	)%		(16.87	)%		20.73	%		8.91	%		11.37	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	206,099		$	217,821		$	645,803		$	833,023		$	543,099		$	367,268
Ratio of expenses to average net assets:
Before expense reimbursement		1.06	%3		0.96	%		0.87	%		0.89	%		0.92	%		0.90	%
After expense reimbursement/recoupment		0.95	%3		0.96	%		0.87	%		0.89	%		0.97	%5		0.90	%
Ratio of net investment income (loss) to average net assets		0.68	%3		1.39	%		1.13	%		1.04	%		0.81	%		1.13	%
Portfolio turnover rate		23	%		62	%		47	%		34	%		50	%		32	%

See accompanying notes to financial statements.
83

UBS U.S. Large Cap Value Equity Fund

Financial highlights

The table below sets forth financial data for one share of beneficial interest outstanding throughout each period presented.

	Class A
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	4.94		$	8.42		$	11.66		$	10.54		$	10.48		$	11.18
Income (loss) from investment operations:
Net investment income1		0.02			0.11			0.14			0.13			0.11			0.12
Net realized and unrealized gain (loss) from investment activities		1.03			(2.66	)		(2.25	)		2.03			1.12			1.22
Total income (loss) from investment operations		1.05			(2.55	)		(2.11	)		2.16			1.23			1.34
Less dividends/distributions:
From net investment income		(0.12	)		(0.06	)		(0.14	)		(0.11	)		(0.12	)		(0.12	)
From net realized gains		—			(0.87	)		(0.99	)		(0.93	)		(1.05	)		(1.92	)
Total dividends/distributions		(0.12	)		(0.93	)		(1.13	)		(1.04	)		(1.17	)		(2.04	)
Net asset value, end of period	$	5.87		$	4.94		$	8.42		$	11.66		$	10.54		$	10.48
Total investment return3		21.32	%		(29.74	)%		(19.38	)%		21.20	%		12.13	%		12.35	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	48,700		$	43,951		$	78,989		$	113,213		$	105,709		$	105,975
Ratio of expenses to average net assets:
Before expense reimbursement		1.59	%4		1.52	%		1.32	%		1.29	%		1.31	%		1.39	%
After expense reimbursement		1.20	%4		1.10	%		1.10	%		1.10	%		1.10	%		1.10	%
Ratio of net investment income to average net assets		0.81	%4		1.89	%		1.35	%		1.12	%		1.07	%		1.09	%
Portfolio turnover rate		39	%		67	%		52	%		27	%		41	%		49	%
	Class B
	Six months ended December 31, 2009			Year ended June 30,
	(unaudited)			2009			2008			2007			2006			2005
Net asset value, beginning of period	$	4.87		$	8.33		$	11.50		$	10.39		$	10.31		$	10.99
Income (loss) from investment operations:
Net investment income1		0.002			0.06			0.06			0.04			0.03			0.04
Net realized and unrealized gain (loss) from investment activities		1.01			(2.62	)		(2.21	)		2.00			1.10			1.20
Total income (loss) from investment operations		1.01			(2.56	)		(2.15	)		2.04			1.13			1.24
Less dividends/distributions:
From net investment income		(0.03	)		(0.03	)		(0.03	)		—			—			—
From net realized gains		—			(0.87	)		(0.99	)		(0.93	)		(1.05	)		(1.92	)
Total dividends/distributions		(0.03	)		(0.90	)		(1.02	)		(0.93	)		(1.05	)		(1.92	)
Net asset value, end of period	$	5.85		$	4.87		$	8.33		$	11.50		$	10.39		$	10.31
Total investment return3		20.74	%		(30.23	)%		(19.92	)%		20.21	%		11.25	%		11.59	%
Ratios/supplemental data:
Net assets, end of period (000's)	$	176		$	247		$	471		$	1,061		$	1,978		$	4,997
Ratio of expenses to average net assets:
Before expense reimbursement		2.66	%4		2.48	%		2.17	%		2.19