The UBS Funds

October 28, 2013

UBS Fixed Income Opportunities Fund

Summary Prospectus

Before you invest, you may want to review the fund's prospectus and statement of additional information ("SAI"), which contain more information about the fund and its risks. You can find the fund's prospectus, SAI and other information about the fund online at http://www.ubs.com/us/en/asset_management/individual_investors/mutual_fund.html. You can also get this information at no cost by calling 1-800-647 1568 or by sending an email request to ubs@fundinsite.com. The current prospectus and SAI, dated October 28, 2013, are incorporated by reference into this summary prospectus (i.e., they are legally a part of this summary prospectus).

Share Class: Ticker Symbol

Class A				Class C				Class Y
FNOAX				FNOCX				FNOYX

Investment objective

The Fund seeks to maximize total return, consisting of capital appreciation and current income.

Fees and expenses

These tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for a sales charge waiver or discount if you and your family invest, or agree to invest in the future, at least $100,000 in the Fund. More information about these and other discounts and waivers, as well as eligibility requirements for each share class, is available from your financial advisor and in "Managing your fund account" on page 28 of the Fund's prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 113 of the Fund's statement of additional information ("SAI").

Shareholder fees (fees paid directly from your investment)

	Class A			Class C			Class Y
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)		4.50	%		None			None
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)		None¹			0.75	%		None
Redemption fee (as a % of amount redeemed within 90 days of purchase, if applicable)		1.00	%		1.00	%		1.00	%

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class A			Class C			Class Y
Management fees		0.65	%		0.65	%		0.65	%
Distribution and/or service (12b-1) fees		0.25			0.75			None
Other expenses		0.52			0.52			0.48
Acquired fund fees and expenses		0.10			0.10			0.10
Total annual fund operating expenses²		1.52			2.02			1.23
Less management fee waiver/expense reimbursements		0.47			0.47			0.43
Total annual fund operating expenses after management fee waiver/expense reimbursements^2,3		1.05			1.55			0.80

¹ Purchases of $1 million or more that were not subject to a front-end sales charge are subject to a 1% CDSC if sold within one year of the purchase date.

² Since the "Acquired fund fees and expenses" are not directly borne by the Fund, they are not reflected in the Fund's financial statements, and therefore the amounts listed in "Total annual fund operating expenses" and "Total annual fund operating expenses after management fee waiver/expense reimbursements" will differ from those presented in the Financial highlights.

³ The Trust, with respect to the Fund, and UBS Global Asset Management (Americas) Inc., the Fund's investment advisor ("UBS Global AM (Americas)" or 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, interest, taxes, brokerage commissions, extraordinary expenses, and dividend expense and security loan fees for securities sold short) to the extent necessary so that the Fund's ordinary operating expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions, extraordinary expenses, and dividend expense and security loan fees for securities sold short), through the period ending October 28, 2014, do not exceed 0.95% for Class A shares, 1.45% for Class C shares and 0.70% 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. The fee waiver/expense reimbursement agreement may be terminated by the Fund's Board of Trustees at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory

contract with the Advisor. Upon termination of the fee waiver/expense reimbursement agreement, however, the UBS Global AM (Americas)'s three year recoupment rights will survive.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your shares at the end of those periods unless otherwise stated. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The costs described in the example reflect the expenses of the Fund that would result from the contractual fee waiver and expense reimbursement agreement with the Advisor for the first year only. Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

	1 year		3 years		5 years		10 years
Class A	$	552	$	865	$	1,199	$	2,143
Class C (assuming sale of all shares at end of period)		233		588		1,045		2,310
Class C (assuming no sale of shares)		158		588		1,045		2,310
Class Y		82		348		634		1,451

Portfolio turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 60% of the average value of its portfolio.

Principal strategies
Principal investments

The Fund seeks to achieve its investment objective by investing its assets across a wide range of fixed income securities, currencies and other investments to generate total returns under a variety of market conditions and economic cycles. The Fund may invest in fixed income securities of US and non-US issuers located in developed and emerging market countries.

Under normal circumstances, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes, if any) in fixed income securities and/or investments that provide exposure to fixed income securities. Investments in fixed income securities may include, but are not limited to, securities of governments throughout the world (including the United States), their agencies and instrumentalities, cash equiv-

alents, debt securities of supranationals and corporations including trust-preferred securities, convertible securities, mortgage-backed securities, asset-backed securities, inflation-linked securities, equipment trusts and other securitized or collateralized debt securities. The Fund's investments in fixed income securities may have all types of interest rate payment and reset terms, including fixed rate, adjustable rate, zero coupon, pay-in-kind and auction rate features. In addition, the fixed income securities purchased by the Fund may be denominated in any currency, have coupons payable in any currency and may be of any maturity or duration. The Fund may invest in fixed income securities of any credit quality, including non-investment grade securities (often referred to as high yield securities or "junk bonds").

The Fund expects to use exchange-traded and/or over-the-counter ("OTC") derivative instruments extensively in employing its long/short, globally-oriented fixed income and currency strategy. Generally, derivatives are financial contracts whose value depends upon, or is derived from, the value of an underlying asset, reference rate, or index, and may relate to stocks, bonds, interest rates, currencies or currency exchange rates, and related indexes. The derivatives in which the Fund may invest include, but are not limited to, options (including, but not limited to, options on futures, forwards and swap agreements), futures, forward agreements, swap agreements (including, but not limited to, interest rate, total return, currency, credit default and inflation swaps), credit-linked securities, caps, floors, collars, structured notes and other derivative instruments. The Fund may invest in derivatives to the extent permitted by the Investment Company Act of 1940, as amended (the "1940 Act").

The Fund may use derivatives for hedging or non-hedging purposes. The Fund intends to use derivatives to earn income and enhance returns, to manage or adjust the risk profile of the Fund, to replace more traditional direct investments, or to obtain exposure to certain markets. The Fund also may use derivatives to establish net short positions for individual markets, currencies and securities or to adjust the Fund's portfolio duration.

In addition, the Fund may establish short positions in fixed income securities through the use of any of the derivative instruments listed above to achieve a negative portfolio duration in an effort to take advantage of periods of rising interest rates and provide the potential for appreciation. The Advisor expects that the duration of the Fund's portfolio will be between approximately +5 years and -5 years depending on the level and expected future direction of interest rates. Duration measures a fixed income security's price sensitivity to interest rates by indicating the approximate change in a fixed income security's price if interest rates move up or

down in 1% increments. For example, when the level of interest rates increases by 1%, the price of a fixed income security or a portfolio of fixed income securities having a positive duration of five years generally will decrease by approximately 5% and the price of a fixed income security or a portfolio of fixed income securities having a negative duration of five years generally will increase by approximately 5%. Conversely when the level of interest rates decreases by 1%, the price of a fixed income security or a portfolio of fixed income securities having a positive duration of five years generally will increase by approximately 5% and the price of a fixed income security or a portfolio of fixed income securities having a negative duration of five years generally will decrease by approximately 5%.

Management process

In employing its investment strategies for the Fund, the Advisor attempts to generate total returns by managing the risks and market exposures of the Fund's portfolio. The Fund utilizes a long/short, global fixed income and currency strategy that emphasizes relative value investing. The Fund pursues a diversified investment strategy and the Advisor has substantial latitude to invest across broad fixed income and currency markets. At times, the unconstrained investment approach may lead the Advisor to have sizable allocations to particular markets, sectors and industries.

The Advisor implements the long/short strategy across multiple dimensions to gain specific exposure to investments that it believes offer an attractive risk-reward opportunity. Typically, the Advisor seeks to exploit opportunities, both long and short, where the market valuation of a particular security differs from the Advisor's valuation for the same security.

The Advisor actively manages the Fund's currency exposure and attempts to generate total returns and manage risk by identifying relative valuation discrepancies among global currencies as well as implementing hedging strategies to limit unwanted currency risks. These decisions are integrated within the macroeconomic framework analysis of global market and economic conditions.

In employing its investment strategies for the Fund, the Advisor attempts to achieve a total rate of return for the Fund which exceeds the rate of return on 3 Month LIBOR (a short-term interest rate that banks charge one another and that is generally representative of short-term interest rates) by 3% for Class A shares, 2.5% for Class C shares, and 3.25% for Class Y shares, each net of fund ordinary operating expenses over rolling five year time horizons. The Advisor does not represent or guarantee that the Fund will meet this total return goal.

The Fund is not a money market, stable net asset value, cash alternative, or a traditional long only fixed income fund. The Fund seeks to maximize total return, consisting of capital appreciation and current income by investing in global fixed income and currency markets. At times, the Fund may have exposures to higher risk strategies within the fixed income and currency markets, and it may take both long and short positions utilizing various instruments including the extensive use of derivatives. Furthermore, given the Fund's less constrained investment approach, it may maintain overall net short positions in any particular market. While the Advisor will seek to manage the Fund's volatility and overall risk exposure in a prudent manner, it is quite possible that the Fund may exhibit negative returns in any particular month, quarter or a year.

Main risks

All investments carry a certain amount of risk and the Fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in the Fund. An investment in the Fund is not a deposit of the bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Below are some of the specific risks of investing in the Fund.

Market risk: The risk that the market value of the Fund's investments may fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry, or sector of the economy, or it may affect the market as a whole.

Interest rate risk: An increase in prevailing interest rates typically causes the value of fixed income securities to fall. When the Fund has a negative portfolio duration, a decline in interest rates may negatively impact the Fund's value. Changes in interest rates will likely affect the value of longer-duration fixed income securities more than shorter-duration securities and higher quality securities more than lower quality securities. When interest rates are falling, some fixed income securities provide that the issuer may repay them earlier than the maturity date, and if this occurs the Fund may have to reinvest these repayments at lower interest rates.

Credit risk: The risk that the Fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to or guarantor of a derivative contract, is unable or unwilling to meet its financial obligations. This risk is likely greater for lower quality investments than for investments that are higher quality.

Foreign investing risk: The value of the Fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad and due to decreases in foreign currency values relative to the

US dollar. Investments in foreign government bonds involve special risks because the Fund may have limited legal recourse in the event of default. Also, foreign securities are sometimes less liquid and more difficult to sell and to value than securities of US issuers. These risks are greater for investments in emerging market issuers. In addition, investments in emerging market issuers may decline in value because of unfavorable foreign government actions, greater risks of political instability or the absence of accurate information about emerging market issuers.

Government securities risk: There are different types of US government securities with different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a US government sponsored entity, although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the US Treasury and are therefore riskier than those that are.

High yield bond risk: The risk that the issuer of bonds with ratings of BB (Standard & Poor's Financial Services LLC ("S&P")) or Ba (Moody's Investors Service, Inc. ("Moody's")) or below, or deemed of equivalent quality, will default or otherwise be unable to honor a financial obligation (also known as lower-rated or "junk bonds"). These securities are considered to be predominately speculative with respect to an issuer's capacity to pay interest and repay principal in accordance with the terms of the obligations. Lower-quality bonds are more likely to be subject to an issuer's default or downgrade than investment grade (higher quality) bonds.

Illiquidity risk: The risk that investments cannot be readily sold at the desired time or price, and the Fund may have to accept a lower price or may not be able to sell the security at all. An inability to sell securities can adversely affect the Fund's value or prevent the Fund from taking advantage of other investment opportunities.

Derivatives risk: The value of "derivatives"—so called because their value "derives" from the value of an underlying asset, reference rate or index—may rise or fall more rapidly than other investments. When using derivatives for non-hedging purposes, it is possible for the Fund to lose more than the amount it invested in the derivative. The risks of investing in derivative instruments also include market risk, management risk and counterparty risk (which is the risk that a counterparty to a derivative contract is unable or unwilling to meet its financial obligations). Derivatives relating to fixed income markets are especially susceptible to interest rate risk and credit risk. In addition, many types of swaps and other non-exchange traded derivatives may

be subject to liquidity risk, credit risk and mispricing or valuation complexity. These derivatives risks are different from, and may be greater than, the risks associated with investing directly in securities and other instruments.

Leverage risk associated with financial instruments: The use of financial instruments to increase potential returns, including derivatives used for investment (non-hedging) purposes, may cause the Fund to be more volatile than if it had not been leveraged. The use of leverage may also accelerate the velocity of losses and can result in losses to the Fund that exceed the amount originally invested.

Investing in other funds risk: The Fund's investment performance is affected by the investment performance of the underlying funds in which the Fund may invest. Through its investment in the underlying funds, the Fund is subject to the risks of the underlying funds' investments and subject to the underlying funds' expenses.

Management risk: The risk that the investment strategies, techniques and risk analyses employed by the Advisor may not produce the desired results.

Performance

Risk/return bar chart and table

The performance information that follows shows the Fund's performance information in a bar chart and an average annual total returns table. The information provides some indication of the risks of investing in the Fund by showing the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance. Index reflects no deduction for fees, expenses or taxes. The Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance for the Fund is available at http://globalam-us.ubs.com/corpweb/performance.do.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for other classes will vary from the Class Y shares' after-tax returns shown.

Total return

Total return January 1 - September 30, 2013: 0.33%
Best quarter during calendar years shown—1Q 2012: 3.55%
Worst quarter during calendar years shown—2Q 2011: (2.20)%

Average annual total returns (figures reflect sales charges)
(for the periods ended December 31, 2012)

Class (inception date)	1 year			Life of class
Class A (11/29/10)
Return before taxes		1.46	%		0.93	%
Class C (11/29/10)
Return before taxes		4.91			2.60
Class Y (11/29/10)
Return before taxes		6.56			3.47
Return after taxes on distributions		5.29			2.15
Return after taxes on distributions and sale of fund shares		4.25			2.26
BofA Merrill Lynch US Dollar 3-Month LIBOR Constant Maturity Index		0.51			0.39

Investment advisor

UBS Global Asset Management (Americas) Inc. serves as the investment advisor to the Fund.

Portfolio managers

• Brian Fehrenbach, portfolio manager of the Fund since inception.

• Scott E. Dolan, portfolio manager of the Fund since inception.

• Hongbing Hsu, portfolio manager of the Fund since inception.

• Branimir Petranovic, portfolio manager of the Fund since inception.

Purchase & sale of Fund shares

You may purchase, redeem or exchange shares of the Fund on any business day, which is any day the New York Stock Exchange is open for business. You may purchase, redeem or exchange shares of the Fund either through a financial advisor or directly from the Fund. In general, the minimum initial investment is $1,000 and the minimum subsequent investment is $100.

Tax information

The dividends and distributions you receive from the Fund are taxable and generally will be taxed as ordinary income, capital gains, or some combination of both, unless you are investing through a tax deferred arrangement, such as a 401(k) plan or an individual retirement account, in which case your distributions generally will be taxed when withdrawn from the tax-deferred account.

Payments to broker/dealers and other financial intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your financial advisor to recommend the Fund over another investment. Ask your financial advisor or visit your financial intermediary's Web site for more information.

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