10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2010

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                    to                     

Commission File Number:                    001-33318

POWERSHARES DB US DOLLAR INDEX BEARISH FUND

(A Series of PowerShares DB US Dollar Index Trust)

(Exact name of Registrant as specified in its charter)

Delaware	87-0778084
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
c/o DB Commodity Services LLC 60 Wall Street New York, New York	10005
(Address of Principal Executive Offices)	(Zip Code)

DB US DOLLAR INDEX BEARISH MASTER FUND

(A Series of DB US Dollar Index Master Trust)

(Exact name of Rule 140 Co-Registrant as specified in its charter)

Delaware	87-0778085
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
c/o DB Commodity Services LLC 60 Wall Street New York, New York	10005
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code: (212) 250-5883

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  þ    No  ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, an Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).    Yes  ¨    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definition of “accelerated filer,” “large accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer	¨	Accelerated Filer	x
Non-Accelerated Filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes  ¨    No  þ

Indicate the number of outstanding Shares as of September 30, 2010: 6,200,000 Shares.

POWERSHARES DB US DOLLAR INDEX BEARISH FUND

(A SERIES OF POWERSHARES DB US DOLLAR INDEX TRUST)

QUARTER ENDED SEPTEMBER 30, 2010

TABLE OF CONTENTS

		Page
PART I.	FINANCIAL INFORMATION		1
ITEM 1.	FINANCIAL STATEMENTS.		1
	Notes to Unaudited Consolidated Financial Statements		19
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.		26
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.		37
ITEM 4.	CONTROLS AND PROCEDURES.		38
PART II.	OTHER INFORMATION		39
Item 1.	Legal Proceedings.		39
Item 1A.	Risk Factors.		39
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.		39
Item 3.	Defaults Upon Senior Securities.		40
Item 4.	Reserved.		40
Item 5.	Other Information.		40
Item 6.	Exhibits.		40
SIGNATURES			42
EXHIBIT INDEX			E-1
Exhibit 31.1	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-2
Exhibit 31.2	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-3
Exhibit 31.3	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-4
Exhibit 31.4	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-5
Exhibit 31.5	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-6
Exhibit 31.6	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-7
Exhibit 31.7	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-8
Exhibit 31.8	Certification required under Exchange Act Rules 13a–14 and 15d–14		E-9
Exhibit 32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-10
Exhibit 32.2	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-11
Exhibit 32.3	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-12
Exhibit 32.4	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-13
Exhibit 32.5	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-14
Exhibit 32.6	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-15
Exhibit 32.7	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-16
Exhibit 32.8	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002		E-17

i

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS.

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Consolidated Statements of Financial Condition

September 30, 2010 (unaudited) and December 31, 2009

	September 30, 2010		December 31, 2009
Assets
Equity in broker trading accounts:
United States Treasury Obligations, at fair value (cost $145,967,736 and $293,980,775, respectively)	$	145,969,397	$	293,985,300
Cash held by broker		14,032,370		33,574,291
Net unrealized appreciation (depreciation) on futures contracts		7,448,094		(7,537,165	)
Deposits with broker		167,449,861		320,022,426
Receivable for securities sold		5,411,680		—
Total assets	$	172,861,541	$	320,022,426
Liabilities
Payable for securities purchased	$	4,998,125	$	—
Management fee payable		97,004		155,747
Brokerage fee payable		2,166		1,755
Total liabilities		5,097,295		157,502
Commitments and Contingencies (Note 9)
Equity
Shareholders’ equity
General shares:
Paid in capital—40 shares issued and outstanding as of September 30, 2010 and December 31, 2009, respectively		1,000		1,000
Accumulated earnings		82		103
Total General shares		1,082		1,103
Shares:
Paid in capital—6,200,000 and 11,600,000 redeemable Shares issued and outstanding as of September 30, 2010 and December 31, 2009, respectively		164,629,430		309,379,654
Accumulated earning		3,132,652		10,483,064
Total Shares		167,762,082		319,862,718
Total shareholders’ equity		167,763,164		319,863,821
Non-controlling interest in consolidated subsidiary—related party		1,082		1,103
Total equity		167,764,246		319,864,924
Total liabilities and equity	$	172,861,541	$	320,022,426
Net asset value per share
General shares	$	27.05	$	27.58
Shares	$	27.06	$	27.57

See accompanying notes to unaudited consolidated financial statements.

1

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Schedule of Investments

September 30, 2010

Description	Percentage of Net Assets			Fair Value		Face Value
United States Treasury Obligations
U.S. Treasury Bills, 0.10% due October 14, 2010		10.73	%	$	17,999,298	$	18,000,000
U.S. Treasury Bills, 0.115% due October 21, 2010		3.58			5,999,568		6,000,000
U.S. Treasury Bills, 0.08% due October 28, 2010		1.79			2,999,697		3,000,000
U.S. Treasury Bills, 0.12% due November 4, 2010		4.17			6,999,104		7,000,000
U.S. Treasury Bills, 0.145% due November 12, 2010		1.19			1,999,708		2,000,000
U.S. Treasury Bills, 0.145% due November 18, 2010		1.19			1,999,662		2,000,000
U.S. Treasury Bills, 0.13% due November 26, 2010		22.64			37,991,146		38,000,000
U.S. Treasury Bills, 0.145% due December 2, 2010		17.88			29,993,280		30,000,000
U.S. Treasury Bills, 0.135% due December 9, 2010		9.53			15,995,856		16,000,000
U.S. Treasury Bills, 0.14% due December 16, 2010		0.60			999,726		1,000,000
U.S. Treasury Bills, 0.16% due December 23, 2010		10.73			17,994,312		18,000,000
U.S. Treasury Bills, 0.155% due December 30, 2010		2.98			4,998,040		5,000,000
Total United States Treasury Obligations (cost $145,967,736)		87.01	%	$	145,969,397

A portion of the above United States Treasury Obligations are held as initial margin against open futures contracts, as described in Note 4(e).

Description	Percentage of Net Assets			Fair Value
Unrealized Appreciation on Futures Contracts
Dollar Index (1,909 contracts, settlement date December 13, 2010)*		4.44	%	$	7,448,094
Net Unrealized Appreciation on Futures Contracts		4.44	%	$	7,448,094

Net unrealized appreciation is comprised entirely of unrealized gains of $7,448,094.

* Positions represent futures contracts sold.

See accompanying notes to unaudited consolidated financial statements.

2

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Consolidated Schedule of Investments

December 31, 2009

Description	Percentage of Net Assets			Fair Value		Face Value
United States Treasury Obligations
U.S. Treasury Bills, 0.07% due January 7, 2010		14.38	%	$	45,999,954	$	46,000,000
U.S. Treasury Bills, 0.07% due January 14, 2010		1.88			5,999,964		6,000,000
U.S. Treasury Bills, 0.01% due January 28, 2010		0.94			2,999,937		3,000,000
U.S. Treasury Bills, 0.025% due February 4, 2010		6.88			21,999,340		22,000,000
U.S. Treasury Bills, 0.065% due February 11, 2010		12.50			39,998,520		40,000,000
U.S. Treasury Bills, 0.065% due February 18, 2010		12.50			39,998,760		40,000,000
U.S. Treasury Bills, 0.04% due February 25, 2010		11.25			35,997,804		36,000,000
U.S. Treasury Bills, 0.06% due March 4, 2010		8.13			25,998,076		26,000,000
U.S. Treasury Bills, 0.05% due March 11, 2010		9.69			30,997,458		31,000,000
U.S. Treasury Bills, 0.04% due March 18, 2010		6.57			20,997,879		21,000,000
U.S. Treasury Bills, 0.07% due March 25, 2010		7.19			22,997,608		23,000,000
Total United States Treasury Obligations (cost $293,980,775)		91.91	%	$	293,985,300

A portion of the above United States Treasury Obligations are held as initial margin against open futures contracts, as described in Note 4(e).

Description	Percentage of Net Assets			Fair Value
Unrealized Depreciation on Futures Contracts
Dollar Index (4,223 contracts, settlement date March 15, 2010)*		(2.36	)%	$	(7,537,165	)
Net Unrealized Depreciation on Futures Contracts		(2.36	)%	$	(7,537,165	)

Net unrealized depreciation is comprised entirely of unrealized losses of $7,537,165.

* Position represents futures contracts sold.

See accompanying notes to unaudited consolidated financial statements.

3

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Statements of Income and Expenses

For the Three Months Ended September 30, 2010 and 2009 and Nine Months Ended September 30, 2010 and 2009

	Three Months Ended						Nine Months Ended
	September 30, 2010			September 30, 2009			September 30, 2010			September 30, 2009
Income
Interest Income, net	$	50,974		$	118,112		$	147,429		$	273,100
Expenses
Management Fee		300,261			403,194			1,099,295			915,752
Brokerage Commissions and Fees		19,018			44,319			78,225			95,075
Total Expenses		319,279			447,513			1,177,520			1,010,827
Net investment loss		(268,305	)		(329,401	)		(1,030,091	)		(737,727	)
Net Realized and Net Change in Unrealized Gain (Loss) on United States Treasury Obligations and Futures
Net Realized Gain (Loss) on
United States Treasury Obligations		115			4,750			4,043			6,472
Futures		9,144,857			10,645,765			(21,306,801	)		22,275,865
Net realized gain (loss)		9,144,972			10,650,515			(21,302,758	)		22,282,337
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations		7,496			31,875			(2,864	)		29,618
Futures		4,657,645			3,062,740			14,985,259			(1,856,660	)
Net change in unrealized gain (loss)		4,665,141			3,094,615			14,982,395			(1,827,042	)
Net realized and net change in unrealized gain (loss) on United States Treasury Obligations and Futures		13,810,113			13,745,130			(6,320,363	)		20,455,295
Net Income (Loss)	$	13,541,808		$	13,415,729		$	(7,350,454	)	$	19,717,568
Less: net (income) loss attributed to the non-controlling interest in consolidated subsidiary - related party		(87	)		(49	)		21			(72	)
Net Income (Loss) Attributable to PowerShares DB US Dollar Index Bearish Fund and Subsidiary	$	13,541,721		$	13,415,680		$	(7,350,433	)	$	19,717,496

See accompanying notes to unaudited consolidated financial statements.

4

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Statement of Changes in Shareholders’ Equity

For the Three Months Ended September 30, 2010

	General Shares										Shares
	Shares		Paid in Capital		Accumulated Earnings (Deficit)			Total Equity			Shares			Paid in Capital			Accumulated Earnings (Deficit)			Total Equity			Total Shareholders’ Equity			Non-controlling Interest			Total Equity
Balance at July 1, 2010		40	$	1,000	$	(5	)	$	995			6,400,000		$	169,547,186		$	(10,408,982	)	$	159,138,204		$	159,139,199		$	995		$	159,140,194
Sale of Shares												800,000			20,922,508						20,922,508			20,922,508						20,922,508
Redemption of Shares												(1,000,000	)		(25,840,264	)					(25,840,264	)		(25,840,264	)					(25,840,264	)
Net Income
Net investment loss						(2	)		(2	)								(268,301	)		(268,301	)		(268,303	)		(2	)		(268,305	)
Net realized gain on United States Treasury Obligations and Futures						60			60									9,144,852			9,144,852			9,144,912			60			9,144,972
Net change in unrealized gain on United States Treasury Obligations and Futures						29			29									4,665,083			4,665,083			4,665,112			29			4,665,141
Net Income						87			87									13,541,634			13,541,634			13,541,721			87			13,541,808
Balance at September 30, 2010		40	$	1,000	$	82		$	1,082			6,200,000		$	164,629,430		$	3,132,652		$	167,762,082		$	167,763,164		$	1,082		$	167,764,246

See accompanying notes to unaudited consolidated financial statements.

5

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Statement of Changes in Shareholders’ Equity

For the Three Months Ended September 30, 2009

	General Shares										Shares
	Shares		Paid in Capital		Accumulated Earnings			Total Equity			Shares			Paid in Capital			Accumulated Earnings			Total Equity			Total Shareholders’ Equity			Non-controlling Interest			Total Equity
Balance at July 1, 2009		40	$	1,000	$	70		$	1,070			10,800,000		$	286,268,070		$	2,716,304		$	288,984,374		$	288,985,444		$	1,070		$	288,986,514
Sale of Shares												2,600,000			72,156,930						72,156,930			72,156,930						72,156,930
Redemption of Shares												(1,400,000	)		(38,842,374	)					(38,842,374	)		(38,842,374	)					(38,842,374	)
Net Income
Net investment loss						(1	)		(1	)								(329,399	)		(329,399	)		(329,400	)		(1	)		(329,401	)
Net realized gain on United States Treasury Obligations and Futures						36			36									10,650,443			10,650,443			10,650,479			36			10,650,515
Net change in unrealized gain on United States Treasury Obligations and Futures						14			14									3,094,587			3,094,587			3,094,601			14			3,094,615
Net Income						49			49									13,415,631			13,415,631			13,415,680			49			13,415,729
Balance at September 30, 2009		40	$	1,000	$	119		$	1,119			12,000,000		$	319,582,626		$	16,131,935		$	335,714,561		$	335,715,680		$	1,119		$	335,716,799

See accompanying notes to unaudited consolidated financial statements.

6

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Statement of Changes in Shareholders’ Equity

For the Nine Months Ended September 30, 2010

	General Shares										Shares
	Shares		Paid in Capital		Accumulated Earnings			Total Equity			Shares			Paid in Capital			Accumulated Earnings			Total Equity			Total Shareholders’ Equity			Non-controlling Interest			Total Equity
Balance at January 1, 2010		40	$	1,000	$	103		$	1,103			11,600,000		$	309,379,654		$	10,483,064		$	319,862,718		$	319,863,821		$	1,103		$	319,864,924
Sale of Shares												4,000,000			101,764,730						101,764,730			101,764,730						101,764,730
Redemption of Shares												(9,400,000	)		(246,514,954	)					(246,514,954	)		(246,514,954	)					(246,514,954	)
Net Loss
Net investment loss						(6	)		(6	)								(1,030,079	)		(1,030,079	)		(1,030,085	)		(6	)		(1,030,091	)
Net realized loss on United States Treasury Obligations and Futures						(92	)		(92	)								(21,302,574	)		(21,302,574	)		(21,302,666	)		(92	)		(21,302,758	)
Net change in unrealized gain on United States Treasury Obligations and Futures						77			77									14,982,241			14,982,241			14,982,318			77			14,982,395
Net Loss						(21	)		(21	)								(7,350,412	)		(7,350,412	)		(7,350,433	)		(21	)		(7,350,454	)
Balance at September 30, 2010		40	$	1,000	$	82		$	1,082			6,200,000		$	164,629,430		$	3,132,652		$	167,762,082		$	167,763,164		$	1,082		$	167,764,246

See accompanying notes to unaudited consolidated financial statements.

7

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Statement of Changes in Shareholders’ Equity

For the Nine Months Ended September 30, 2009

	General Shares										Shares
	Shares		Paid in Capital		Accumulated Earnings			Total Equity			Shares			Paid in Capital			Accumulated Earnings (Deficit)			Total Equity			Total Shareholders’ Equity			Non-controlling Interest			Total Equity
Balance at January 1, 2009		40	$	1,000	$	47		$	1,047			6,600,000		$	176,334,854		$	(3,585,489	)	$	172,749,365		$	172,750,412		$	1,047		$	172,751,459
Sale of Shares												10,200,000			269,333,168						269,333,168			269,333,168						269,333,168
Redemption of Shares												(4,800,000	)		(126,085,396	)					(126,085,396	)		(126,085,396	)					(126,085,396	)
Net Income
Net investment loss						(2	)		(2	)								(737,723	)		(737,723	)		(737,725	)		(2	)		(737,727	)
Net realized gain on United States Treasury Obligations and Futures						65			65									22,282,207			22,282,207			22,282,272			65			22,282,337
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures						9			9									(1,827,060	)		(1,827,060	)		(1,827,051	)		9			(1,827,042	)
Net Income						72			72									19,717,424			19,717,424			19,717,496			72			19,717,568
Balance at September 30, 2009		40	$	1,000	$	119		$	1,119			12,000,000		$	319,582,626		$	16,131,935		$	335,714,561		$	335,715,680		$	1,119		$	335,716,799

See accompanying notes to unaudited consolidated financial statements.

8

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Unaudited Consolidated Statements of Cash Flows

For the Nine Months Ended September 30, 2010 and 2009

	Nine Months Ended
	September 30, 2010			September 30, 2009
Cash flows from operating activities:
Net Income (Loss)	$	(7,350,454	)	$	19,717,568
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Cost of securities purchased		(534,827,077	)		(816,664,463	)
Proceeds from securities sold and matured		682,991,884			609,995,723
Net accretion of discount on United States Treasury Obligations		(147,725	)		(273,100	)
Net realized gain on United States Treasury Obligations		(4,043	)		(6,472	)
Net change in unrealized (gain) loss on United States Treasury Obligations and futures		(14,982,395	)		1,827,042
Change in operating receivables and liabilities:
Receivable for securities sold		(5,411,680	)		5,234,830
Payable for securities purchased		4,998,125			(4,999,125	)
Management fee payable		(58,743	)		87,933
Brokerage fee payable		411			1,011
Net cash provided by (used for) operating activities		125,208,303			(185,079,053	)
Cash flows from financing activities:
Proceeds from sale of Shares		101,764,730			269,333,168
Redemption of Shares		(246,514,954	)		(126,085,396	)
Net cash provided by (used for) financing activities		(144,750,224	)		143,247,772
Net change in cash held by broker		(19,541,921	)		(41,831,281	)
Cash held by broker at beginning of period		33,574,291			67,132,379
Cash held by broker at end of period	$	14,032,370		$	25,301,098

See accompanying notes to unaudited consolidated financial statements.

9

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Statements of Financial Condition

September 30, 2010 (unaudited) and December 31, 2009

	September 30, 2010		December 31, 2009
Assets
Equity in broker trading accounts:
United States Treasury Obligations, at fair value (cost $145,967,736 and $293,980,775, respectively)	$	145,969,397	$	293,985,300
Cash held by broker		14,032,370		33,574,291
Net unrealized appreciation (depreciation) on futures contracts		7,448,094		(7,537,165	)
Deposits with broker		167,449,861		320,022,426
Receivable for securities sold		5,411,680		—
Total assets	$	172,861,541	$	320,022,426
Liabilities
Payable for securities purchased	$	4,998,125	$	—
Management fee payable		97,004		155,747
Brokerage fee payable		2,166		1,755
Total liabilities		5,097,295		157,502
Commitments and Contingencies (Note 9)
Equity
Unit holders’ equity
General units:
Paid in capital—80 units issued and outstanding as of September 30, 2010 and December 31, 2009, respectively		2,000		2,000
Accumulated earnings		164		206
Total General units		2,164		2,206
Limited units:
Paid in capital—6,200,000 and 11,600,000 redeemable units issued and outstanding as of September 30, 2010 and December 31, 2009, respectively		164,629,430		309,379,654
Accumulated earnings		3,132,652		10,483,064
Total Limited units		167,762,082		319,862,718
Total unit holders’ equity		167,764,246		319,864,924
Total liabilities and equity	$	172,861,541	$	320,022,426
Net asset value per unit
General unit	$	27.05	$	27.58
Limited unit	$	27.06	$	27.57

See accompanying notes to unaudited consolidated financial statements.

10

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Schedule of Investments

September 30, 2010

Description	Percentage of Net Assets			Fair Value		Face Value
United States Treasury Obligations
U.S. Treasury Bills, 0.10% due October 14, 2010		10.73	%	$	17,999,298	$	18,000,000
U.S. Treasury Bills, 0.115% due October 21, 2010		3.58			5,999,568		6,000,000
U.S. Treasury Bills, 0.08% due October 28, 2010		1.79			2,999,697		3,000,000
U.S. Treasury Bills, 0.12% due November 4, 2010		4.17			6,999,104		7,000,000
U.S. Treasury Bills, 0.145% due November 12, 2010		1.19			1,999,708		2,000,000
U.S. Treasury Bills, 0.145% due November 18, 2010		1.19			1,999,662		2,000,000
U.S. Treasury Bills, 0.13% due November 26, 2010		22.64			37,991,146		38,000,000
U.S. Treasury Bills, 0.145% due December 2, 2010		17.88			29,993,280		30,000,000
U.S. Treasury Bills, 0.135% due December 9, 2010		9.53			15,995,856		16,000,000
U.S. Treasury Bills, 0.14% due December 16, 2010		0.60			999,726		1,000,000
U.S. Treasury Bills, 0.16% due December 23, 2010		10.73			17,994,312		18,000,000
U.S. Treasury Bills, 0.155% due December 30, 2010		2.98			4,998,040		5,000,000
Total United States Treasury Obligations (cost $145,967,736)		87.01	%	$	145,969,397

A portion of the above United States Treasury Obligations are held as initial margin against open futures contracts, as described in Note 4(e).

Description	Percentage of Net Assets			Fair Value
Unrealized Appreciation on Futures Contracts
Dollar Index (1,909 contracts, settlement date December 13, 2010)*		4.44	%	$	7,448,094
Net Unrealized Appreciation on Futures Contracts		4.44	%	$	7,448,094

Net unrealized appreciation is comprised entirely of unrealized gains of $7,448,094.

* Positions represent futures contracts sold.

See accompanying notes to unaudited consolidated financial statements.

11

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of PowerShares DB US Dollar Index Bearish Fund)

Schedule of Investments

December 31, 2009

Description	Percentage of Net Assets			Fair Value		Face Value
United States Treasury Obligations
U.S. Treasury Bills, 0.07% due January 7, 2010		14.38	%	$	45,999,954	$	46,000,000
U.S. Treasury Bills, 0.07% due January 14, 2010		1.88			5,999,964		6,000,000
U.S. Treasury Bills, 0.01% due January 28, 2010		0.94			2,999,937		3,000,000
U.S. Treasury Bills, 0.025% due February 4, 2010		6.88			21,999,340		22,000,000
U.S. Treasury Bills, 0.065% due February 11, 2010		12.50			39,998,520		40,000,000
U.S. Treasury Bills, 0.065% due February 18, 2010		12.50			39,998,760		40,000,000
U.S. Treasury Bills, 0.04% due February 25, 2010		11.25			35,997,804		36,000,000
U.S. Treasury Bills, 0.06% due March 4, 2010		8.13			25,998,076		26,000,000
U.S. Treasury Bills, 0.05% due March 11, 2010		9.69			30,997,458		31,000,000
U.S. Treasury Bills, 0.04% due March 18, 2010		6.57			20,997,879		21,000,000
U.S. Treasury Bills, 0.07% due March 25, 2010		7.19			22,997,608		23,000,000
Total United States Treasury Obligations (cost $293,980,775)		91.91	%	$	293,985,300

A portion of the above United States Treasury Obligations are held as initial margin against open futures contracts, as described in Note 4(e).

Description	Percentage of Net Assets			Fair Value
Unrealized Depreciation on Futures Contracts
Dollar Index (4,223 contracts, settlement date March 15, 2010)*		(2.36	)%	$	(7,537,165	)
Net Unrealized Depreciation on Futures Contracts		(2.36	)%	$	(7,537,165	)

Net unrealized depreciation is comprised entirely of unrealized losses of $7,537,165.

* Position represents futures contracts sold.

See accompanying notes to unaudited consolidated financial statements.

12

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Statements of Income and Expenses

For the Three Months Ended September 30, 2010 and 2009 and Nine Months Ended September 30, 2010 and 2009

	Three Months Ended						Nine Months Ended
	September 30, 2010			September 30, 2009			September 30, 2010			September 30, 2009
Income
Interest Income, net	$	50,974		$	118,112		$	147,429		$	273,100
Expenses
Management Fee		300,261			403,194			1,099,295			915,752
Brokerage Commissions and Fees		19,018			44,319			78,225			95,075
Total Expenses		319,279			447,513			1,177,520			1,010,827
Net investment loss		(268,305	)		(329,401	)		(1,030,091	)		(737,727	)
Net Realized and Net Change in Unrealized Gain (Loss) on United States Treasury Obligations and Futures
Net Realized Gain (Loss) on
United States Treasury Obligations		115			4,750			4,043			6,472
Futures		9,144,857			10,645,765			(21,306,801	)		22,275,865
Net realized gain (loss)		9,144,972			10,650,515			(21,302,758	)		22,282,337
Net Change in Unrealized Gain (Loss) on
United States Treasury Obligations		7,496			31,875			(2,864	)		29,618
Futures		4,657,645			3,062,740			14,985,259			(1,856,660	)
Net change in unrealized gain (loss)		4,665,141			3,094,615			14,982,395			(1,827,042	)
Net realized and net change in unrealized gain (loss) on United States Treasury Obligations and Futures		13,810,113			13,745,130			(6,320,363	)		20,455,295
Net Income (Loss)	$	13,541,808		$	13,415,729		$	(7,350,454	)	$	19,717,568

See accompanying notes to unaudited consolidated financial statements.

13

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Statement of Changes in Unit Holders’ Equity

For the Three Months Ended September 30, 2010

	General Units										Limited Units
	Units		Paid in Capital		Accumulated Earnings (Deficit)			Total Equity			Units			Paid in Capital			Accumulated Earnings (Deficit)			Total Equity			Total Unit Holders’ Equity
Balance at July 1, 2010		80	$	2,000	$	(10	)	$	1,990			6,400,000		$	169,547,186		$	(10,408,982	)	$	159,138,204		$	159,140,194
Sale of Limited Units												800,000			20,922,508						20,922,508			20,922,508
Redemption of Limited Units												(1,000,000	)		(25,840,264	)					(25,840,264	)		(25,840,264	)
Net Income
Net investment loss						(4	)		(4	)								(268,301	)		(268,301	)		(268,305	)
Net realized gain on United States Treasury Obligations and Futures						120			120									9,144,852			9,144,852			9,144,972
Net change in unrealized gain on United States Treasury Obligations and Futures						58			58									4,665,083			4,665,083			4,665,141
Net Income						174			174									13,541,634			13,541,634			13,541,808
Balance at September 30, 2010		80	$	2,000	$	164		$	2,164			6,200,000		$	164,629,430		$	3,132,652		$	167,762,082		$	167,764,246

See accompanying notes to unaudited consolidated financial statements.

14

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Statement of Changes in Unit Holders’ Equity

For the Three Months Ended September 30, 2009

	General Units										Limited Units
	Units		Paid in Capital		Accumulated Earnings			Total Equity			Units			Paid in Capital			Accumulated Earnings			Total Equity			Total Unit Holders’ Equity
Balance at July 1, 2009		80	$	2,000	$	140		$	2,140			10,800,000		$	286,268,070		$	2,716,304		$	288,984,374		$	288,986,514
Sale of Limited Units												2,600,000			72,156,930						72,156,930			72,156,930
Redemption of Limited Units												(1,400,000	)		(38,842,374	)					(38,842,374	)		(38,842,374	)
Net Income
Net investment loss						(2	)		(2	)								(329,399	)		(329,399	)		(329,401	)
Net realized gain on United States Treasury Obligations and Futures						72			72									10,650,443			10,650,443			10,650,515
Net change in unrealized gain on United States Treasury Obligations and Futures						28			28									3,094,587			3,094,587			3,094,615
Net Income						98			98									13,415,631			13,415,631			13,415,729
Balance at September 30, 2009		80	$	2,000	$	238		$	2,238			12,000,000		$	319,582,626		$	16,131,935		$	335,714,561		$	335,716,799

See accompanying notes to unaudited consolidated financial statements.

15

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Statement of Changes in Unit Holders’ Equity

For the Nine Months Ended September 30, 2010

	General Units										Limited Units
	Units		Paid in Capital		Accumulated Earnings			Total Equity			Units			Paid in Capital			Accumulated Earnings			Total Equity			Total Unit  Holders’ Equity
Balance at January 1, 2010		80	$	2,000	$	206		$	2,206			11,600,000		$	309,379,654		$	10,483,064		$	319,862,718		$	319,864,924
Sale of Limited Units												4,000,000			101,764,730						101,764,730			101,764,730
Redemption of Limited Units												(9,400,000	)		(246,514,954	)					(246,514,954	)		(246,514,954	)
Net Loss
Net investment loss						(12	)		(12	)								(1,030,079	)		(1,030,079	)		(1,030,091	)
Net realized loss on United States Treasury Obligations and Futures						(184	)		(184	)								(21,302,574	)		(21,302,574	)		(21,302,758	)
Net change in unrealized gain on United States Treasury Obligations and Futures						154			154									14,982,241			14,982,241			14,982,395
Net Loss						(42	)		(42	)								(7,350,412	)		(7,350,412	)		(7,350,454	)
Balance at September 30, 2010		80	$	2,000	$	164		$	2,164			6,200,000		$	164,629,430		$	3,132,652		$	167,762,082		$	167,764,246

See accompanying notes to unaudited consolidated financial statements.

16

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Statement of Changes in Unit Holders’ Equity

For the Nine Months Ended September 30, 2009

	General Units										Limited Units
	Units		Paid in Capital		Accumulated Earnings			Total Equity			Units			Paid in Capital			Accumulated Earnings (Deficit)			Total Equity			Total Unit  Holders’ Equity
Balance at January 1, 2009		80	$	2,000	$	94		$	2,094			6,600,000		$	176,334,854		$	(3,585,489	)	$	172,749,365		$	172,751,459
Sale of Limited Units												10,200,000			269,333,168						269,333,168			269,333,168
Redemption of Limited Units												(4,800,000	)		(126,085,396	)					(126,085,396	)		(126,085,396	)
Net Income
Net investment loss						(4	)		(4	)								(737,723	)		(737,723	)		(737,727	)
Net realized gain on United States Treasury Obligations and Futures						130			130									22,282,207			22,282,207			22,282,337
Net change in unrealized gain (loss) on United States Treasury Obligations and Futures						18			18									(1,827,060	)		(1,827,060	)		(1,827,042	)
Net Income						144			144									19,717,424			19,717,424			19,717,568
Balance at September 30, 2009		80	$	2,000	$	238		$	2,238			12,000,000		$	319,582,626		$	16,131,935		$	335,714,561		$	335,716,799

See accompanying notes to unaudited consolidated financial statements.

17

DB US Dollar Index Bearish Master Fund

(A majority owned subsidiary of Powershares DB US Dollar Index Bearish Fund)

Unaudited Statements of Cash Flows

For the Nine Months Ended September 30, 2010 and 2009

	Nine Months Ended
	September 30, 2010			September 30, 2009
Cash flows from operating activities:
Net Income (Loss)	$	(7,350,454	)	$	19,717,568
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
Cost of securities purchased		(534,827,077	)		(816,664,463	)
Proceeds from securities sold and matured		682,991,884			609,995,723
Net accretion of discount on United States Treasury Obligations		(147,725	)		(273,100	)
Net realized gain on United States Treasury Obligations		(4,043	)		(6,472	)
Net change in unrealized (gain) loss on United States Treasury Obligations and futures		(14,982,395	)		1,827,042
Change in operating receivables and liabilities:
Receivable for securities sold		(5,411,680	)		5,234,830
Payable for securities purchased		4,998,125			(4,999,125	)
Management fee payable		(58,743	)		87,933
Brokerage fee payable		411			1,011
Net cash provided by (used for) operating activities		125,208,303			(185,079,053	)
Cash flow from financing activities:
Proceeds from sale of Limited Units		101,764,730			269,333,168
Redemption of Limited Units		(246,514,954	)		(126,085,396	)
Net cash provided by (used for) financing activities		(144,750,224	)		143,247,772
Net change in cash held by broker		(19,541,921	)		(41,831,281	)
Cash held by broker at beginning of period		33,574,291			67,132,379
Cash held by broker at end of period	$	14,032,370		$	25,301,098

See accompanying notes to unaudited consolidated financial statements.

18

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements

September 30, 2010

(1) Organization

PowerShares DB US Dollar Index Bearish Fund (the “Fund”; “Fund” may also refer to the Fund and the Master Fund, collectively, as the context requires), a separate series of PowerShares DB US Dollar Index Trust (the “Trust”), a Delaware statutory trust organized in two separate series, and its subsidiary, DB US Dollar Index Bearish Master Fund (the “Master Fund”), a separate series of DB US Dollar Index Bearish Master Trust (the “Master Trust”), a Delaware statutory trust organized in two separate series, were formed on August 3, 2006. DB Commodity Services LLC, a Delaware limited liability company (“DBCS” or the “Managing Owner”), funded both the Fund and the Master Fund with a capital contribution of $1,000 in exchange for 40 General Shares of the Fund and 40 General Units of the Master Fund. The fiscal year end of the Fund is December 31st. The term of the Fund is perpetual (unless terminated earlier in certain circumstances) as provided in the Amended and Restated Declaration of Trust and Trust Agreement of the Trust and the Master Trust (each a “Trust Agreement”, and collectively, the “Trust Agreements”).

The Fund offers common units of beneficial interest (the “Shares”) only to certain eligible financial institutions (the “Authorized Participants”) in one or more blocks of 200,000 Shares, called a Basket. The proceeds from the offering of Shares are invested in the Master Fund. The Fund and the Master Fund commenced investment operations on February 15, 2007. The Fund commenced trading on the American Stock Exchange (now known as the NYSE Alternext US LLC (the “NYSE Alternext”)) on February 20, 2007 and, as of November 25, 2008, is listed on the NYSE Arca, Inc. (the “NYSE Arca”).

This report covers the three months ended September 30, 2010 and 2009 (hereinafter referred to as the “Three Months Ended September 30, 2010” and the “Three Months Ended September 30, 2009”, respectively) and the Nine Months Ended September 30, 2010 and 2009 (hereinafter referred to as the “Nine Months Ended September 30, 2010” and the “Nine Months Ended September 30, 2009”, respectively).

Financial statements of the Master Fund are presented separately. The Master Fund is wholly-owned by the Fund and the Managing Owner. Unless otherwise indicated, the notes to the consolidated financial statements apply to both the Fund and the Master Fund.

(2) Fund Investment Overview

The Fund invests substantially all of its assets in the Master Fund in a master-feeder structure. The Fund holds no investment assets other than Master Fund Units. The Master Fund is wholly-owned by the Fund and the Managing Owner. Each Share issued by the Fund correlates with a Master Fund Unit issued by the Master Fund and held by the Fund.

The Fund, through the Master Fund, establishes short positions in certain futures contracts (the “DX Contracts”), with a view to tracking the changes, whether positive or negative, in the level of the Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Excess Return, the Short Index or the Index, over time. The performance of the Fund also is intended to reflect the excess, if any, of its Master Fund’s interest income from its holdings of United States Treasury Obligations and other high credit quality short-term fixed income securities over the expenses of the Fund and the Master Fund. The Index is calculated to reflect the changes in market value over time, whether positive or negative, of short positions in DX Contracts. DX Contracts are traded through the currency markets of ICE Futures U.S. (formerly known as the New York Board of Trade^®), under the symbol “DX.” The changes in market value over time, whether positive or negative, of the DX Contracts are related to the changes, whether positive or negative, in the level of the U.S. Dollar Index^® (the “USDX^®”). The Index provides a general indication of the international value of the U.S. dollar relative to the six major world currencies (the “Index Currencies”), which comprise the USDX^® — Euro, Japanese Yen, British Pound, Canadian Dollar, Swedish Krona and Swiss Franc.

The Fund does not employ leverage. As of September 30, 2010 and December 31, 2009, the Fund had $167,449,861 (or 100%) and $320,022,426 (or 100%), respectively, of its holdings of cash, United States Treasury Obligations and unrealized appreciation/depreciation on futures contracts on deposit with its Commodity Broker. Of this, $3,046,764 (or 1.82%) and $6,739,908 (or 2.11%), respectively, of the Fund’s holdings of cash and United States Treasury Obligations are required to be deposited as margin in support of the Fund’s short futures positions on DX Contracts. For additional information, please see the unaudited Consolidated Schedule of Investments as of September 30, 2010 and the audited Consolidated Schedule of Investments as of December 31, 2009 for a breakdown of the Fund’s portfolio holdings.

19

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements—(Continued)

September 30, 2010

(3) Service Providers and Related Party Agreements

The Trustee

Under the Trust Agreements, Wilmington Trust Company, the trustee of the Fund and the Master Fund (the “Trustee”), has delegated to the Managing Owner the exclusive management and control of all aspects of the business of the Trust, the Fund, the Master Trust and the Master Fund. The Trustee will have no duty or liability to supervise or monitor the performance of the Managing Owner, nor will the Trustee have any liability for the acts or omissions of the Managing Owner.

The Managing Owner

The Managing Owner serves the Fund and Master Fund as commodity pool operator, commodity trading advisor and managing owner, and is an indirect wholly-owned subsidiary of Deutsche Bank AG. During the Three Months Ended September 30, 2010 and 2009, the Fund and the Master Fund incurred Management Fees of $300,261 and $403,194, respectively. Management Fees incurred during the Nine Months Ended September 30, 2010 and 2009 by the Fund and the Master Fund were $1,099,295 and $915,752, respectively. As of September 30, 2010 and December 31, 2009, Management Fees payable to the Managing Owner were $97,004 and $155,747, respectively.

The Commodity Broker

Deutsche Bank Securities Inc., a Delaware corporation, serves as the Master Fund’s clearing broker (the “Commodity Broker”). The Commodity Broker is an indirect wholly-owned subsidiary of Deutsche Bank AG and is an affiliate of the Managing Owner. In its capacity as clearing broker, the Commodity Broker executes and clears each of the Master Fund’s futures transactions and performs certain administrative and custodial services for the Master Fund. As custodian of the Master Fund’s assets, the Commodity Broker is responsible, among other things, for providing periodic accountings of all dealings and actions taken by the Master Trust on behalf of the Master Fund during the reporting period, together with an accounting of all securities, cash or other indebtedness or obligations held by it or its nominees for or on behalf of the Master Fund. During the Three Months Ended September 30, 2010 and 2009, the Fund and the Master Fund incurred brokerage fees of $19,018 and $44,319, respectively. Brokerage fees incurred during the Nine Months Ended September 30, 2010 and 2009 by the Fund and the Master Fund were $78,225 and $95,075, respectively. As of September 30, 2010 and December 31, 2009, brokerage fees payable were $2,166 and $1,755, respectively.

The Administrator

The Bank of New York Mellon (the “Administrator”) has been appointed by the Managing Owner as the administrator, custodian and transfer agent of the Master Fund and the Fund, and has entered into separate administrative, custodian, transfer agency and service agreements (collectively referred to as the “Administration Agreement”).

Pursuant to the Administration Agreement, the Administrator performs or supervises the performance of services necessary for the operation and administration of the Fund and the Master Fund (other than making investment decisions), including receiving and processing orders from Authorized Participants to create and redeem Baskets, net asset value calculations, accounting and other fund administrative services. The Administrator retains certain financial books and records, including: Basket creation and redemption books and records, fund accounting records, ledgers with respect to assets, liabilities, capital, income and expenses, the registrar, transfer journals and related details, and trading and related documents received from futures commission merchants.

The Distributor

ALPS Distributors, Inc. (the “Distributor”) provides certain distribution services to the Fund. Pursuant to the Distribution Services Agreement among the Managing Owner in its capacity as managing owner of the Fund, the Fund and the Distributor, the Distributor assists the Managing Owner and the Administrator with certain functions and duties relating to distribution and marketing services to the Fund including reviewing and approving marketing materials.

Invesco Powershares Capital Management LLC

Under the License Agreement among Invesco Powershares Capital Management LLC (the “Licensor”) and the Managing Owner in its own capacity and in its capacity as managing owner of the Fund (the Fund and the Managing Owner, collectively, the “Licensees”), the Licensor granted to each Licensee a non-exclusive license to use the “PowerShares^®” trademark (the “Trademark”) anywhere in the world, solely in connection with the marketing and promotion of the Fund and to use or refer to the Trademark in connection with the issuance and trading of the Fund as necessary.

Invesco Aim Distributors, Inc.

Through a marketing agreement between the Managing Owner and Invesco Aim Distributors, Inc. (“Invesco Aim Distributors”), an affiliate of Invesco PowerShares Capital Management LLC (“Invesco PowerShares”), the Managing Owner, on behalf of the Fund and the Master Fund, has appointed Invesco Aim Distributors as a marketing agent. Invesco Aim Distributors assists the Managing

20

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements—(Continued)

September 30, 2010

Owner and the Administrator with certain functions and duties such as providing various educational and marketing activities regarding the Fund, primarily in the secondary trading market, which activities include, but are not limited to, communicating the Fund’s name, characteristics, uses, benefits, and risks, consistent with the prospectus. Invesco Aim Distributors will not open or maintain customer accounts or handle orders for the Fund. Invesco Aim Distributors engages in public seminars, road shows, conferences, media interviews, and distributes sales literature and other communications (including electronic media) regarding the Fund.

(4) Summary of Significant Accounting Policies

(a) Basis of Presentation and Consolidation

The consolidated financial statements of the Fund have been prepared using U.S. generally accepted accounting principles, and they include the consolidated financial statement balances of the Fund and the Master Fund. Upon the initial offering of the Shares on February 15, 2007, the capital raised by the Fund was used to purchase 100% of the common units of beneficial interest of the Master Fund (the “Master Fund Limited Units”) (excluding common units of beneficial interest of the Master Fund held by the Managing Owner (the “Master Fund General Units”)). The Master Fund Limited Units owned by the Fund provide the Fund and its investors certain controlling rights and abilities over the Master Fund. Consequently, the financial statement balances of the Master Fund have been consolidated with the Fund’s financial statement balances, and all significant inter-company balances and transactions have been eliminated. Separate financial statements of the Master Fund are presented to comply with SEC reporting requirements as the Master Fund is a separate SEC registrant.

(b) Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses and related disclosure of contingent assets and liabilities during the reporting period of the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

(c) Financial Instruments and Fair Value

United States Treasury Obligations and currency futures contracts are recorded in the consolidated statements of financial condition on a trade date basis at fair value with changes in fair value recognized in earnings in each period. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price).

Financial Accounting Standards Board (FASB) fair value measurement and disclosure guidance requires a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below:

Basis of Fair Value Measurement

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2: Quoted prices in markets that are not active or financial instruments for which all significant inputs are observable, either directly or indirectly;

Level 3: Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable.

A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

In determining fair value of United States Treasury Obligations and currency futures contracts, the Fund uses unadjusted quoted market prices in active markets. United States Treasury Obligations and currency futures contracts are classified within Level 1 of the fair value hierarchy. The Fund does not adjust the quoted prices for United States Treasury Obligations and currency futures contracts.

(d) Deposits with Broker

The Fund deposits cash and United States Treasury Obligations with its Commodity Broker subject to Commodity Futures Trading Commission (the “CFTC”) regulations and various exchange and broker requirements. The combination of the Fund’s deposits with its Commodity Broker of cash and United States Treasury Obligations and the unrealized profit or loss on open futures contracts (variation margin) represents the Fund’s overall equity in its broker trading account. To meet the Fund’s initial margin requirements, the Fund holds United States Treasury Obligations. The Fund uses its cash held by the Commodity Broker to satisfy variation margin requirements. The Fund earns interest on its cash deposited with the Commodity Broker.

21

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements—(Continued)

September 30, 2010

(e) United States Treasury Obligations

The Fund records purchases and sales of United States Treasury Obligations on a trade date basis. These holdings are marked to market based on quoted market closing prices. The Fund holds United States Treasury Obligations for deposit with the Master Fund’s Commodity Broker to meet margin requirements and for trading purposes. Interest income is recognized on an accrual basis when earned. Premiums and discounts are amortized or accreted over the life of the United States Treasury Obligations. Included in the United States Treasury Obligations as of September 30, 2010 and December 31, 2009 were holdings of $3,046,764 and $6,739,908, respectively, which were restricted and held against initial margin of the open futures contracts. The Fund purchased $5,000,000 notional amount of United States Treasury Obligations which was unpaid as of September 30, 2010. As a result a payable for securities purchased is reported for $4,998,125. There was no payable for securities purchased balance as of December 31, 2009.

(f) Cash Held by Broker

The Fund’s arrangement with the Commodity Broker requires the Fund to meet its variation margin requirement related to the price movements, both positive and negative, on futures contracts held by the Fund by keeping cash on deposit with the Commodity Broker. The Fund defines cash and cash equivalents to be highly liquid investments, with original maturities of three months or less when purchased. As of September 30, 2010, the Fund had cash held by the Commodity Broker of $14,032,370. As of December 31, 2009, the Fund had cash held by the Commodity Broker of $33,574,291, of which $7,537,165, was on deposit to satisfy the Fund’s negative variation margin on open futures contracts.

(g) Income Taxes

The Fund and the Master Fund are classified as partnerships for U.S. federal income tax purposes. Accordingly, neither the Fund nor the Master Fund will incur U.S. federal income taxes. No provision for federal, state, and local income taxes has been made in the accompanying consolidated financial statements, as investors are individually liable for income taxes, if any, on their allocable share of the Fund’s share of the Master Fund’s income, gain, loss, deductions and other items.

The major tax jurisdiction for the Fund and the earliest tax year subject to examination: United States 2007.

(h) Futures Contracts

All currency futures contracts are held and used for trading purposes. The currency futures are recorded on a trade date basis and open contracts are recorded in the consolidated statement of financial condition at fair value on the last business day of the period, which represents market value for those currency futures for which market quotes are readily available. However, when market closing prices are not available, the Managing Owner may value an asset of the Master Fund pursuant to policies the Managing Owner has adopted, which are consistent with normal industry standards. Realized gains (losses) and changes in unrealized appreciation (depreciation) on open positions are determined on a specific identification basis and recognized in the consolidated statement of income and expenses in the period in which the contract is closed or the changes occur, respectively. As of September 30, 2010 and December 31, 2009, the futures contracts held by the Fund were in a net unrealized appreciation position of $7,448,094 and a net unrealized depreciation position of $7,537,165, respectively.

(i) Management Fee

The Master Fund pays the Managing Owner a management fee (the “Management Fee”), monthly in arrears, in an amount equal to 0.75% per annum of the daily net asset value of the Master Fund. No separate Management Fee is paid by the Fund. The Management Fee is paid in consideration of the Managing Owner’s currency futures trading advisory services. Effective January 4, 2010, the Management Fee payable by the Master Fund was increased from 0.50% to 0.75% per annum of the daily net asset value of the Master Fund.

(j) Brokerage Commissions and Fees

The Master Fund incurs all brokerage commissions, including applicable exchange fees, NFA fees, give-up fees, pit brokerage fees and other transaction related fees and expenses charged in connection with trading activities by the Commodity Broker. These costs are recorded as brokerage commissions and fees in the consolidated statement of income and expenses as incurred. The Commodity Broker’s brokerage commissions and trading fees are determined on a contract-by-contract basis. On average, total charges paid to the Commodity Broker were less than $10.00 per round-turn trade for the Three Months Ended September 30, 2010 and 2009 and the Nine Months Ended September 30, 2010 and 2009.

22

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements—(Continued)

September 30, 2010

(k) Routine Operational, Administrative and Other Ordinary Expenses

The Managing Owner assumes all routine operational, administrative and other ordinary expenses of the Fund and the Master Fund, including, but not limited to, computer services, the fees and expenses of the Trustee, legal and accounting fees and expenses, tax preparation expenses, filing fees and printing, mailing and duplication costs. Accordingly, all such expenses are not reflected in the consolidated statement of income and expenses of the Fund.

(l) Organizational and Offering Costs

All organizational and offering expenses of the Fund and its Master Fund are incurred and assumed by the Managing Owner. Neither the Fund nor its Master Fund are, or will be, responsible to the Managing Owner for the reimbursement of organizational and offering costs. Expenses incurred in connection with the continuous offering of Shares also will be paid by the Managing Owner.

(m) Non-Recurring and Unusual Fees and Expenses

The Master Fund pays all fees and expenses, if any, of the Fund and the Master Fund, which are non-recurring and unusual in nature. Such expenses include legal claims and liabilities, litigation costs or indemnification or other unanticipated expenses. Such fees and expenses, by their nature, are unpredictable in terms of timing and amount. For the Three Months Ended September 30, 2010 and 2009 and the Nine Months Ended September 30, 2010 and 2009, the Fund and the Master Fund did not incur such expenses.

(5) Fair Value Measurements

The Fund’s assets and liabilities recorded at fair value have been categorized based upon the fair value hierarchy discussed in Note 4(c).

Assets and Liabilities Measured at Fair Value were as follows:

	September 30, 2010		December 31, 2009
United States Treasury Obligations (Level 1)	$	145,969,397	$	293,985,300
Currency Futures Contracts (Level 1)	$	7,448,094	$	(7,537,165	)

There were no Level 2 or Level 3 holdings as of September 30, 2010 and December 31, 2009.

(6) Financial Instrument Risk

In the normal course of its business, the Master Fund is party to financial instruments with off-balance sheet risk. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the balance sheet, may result in a future obligation or loss. The financial instruments used by the Master Fund are currency futures, whose values are based upon an underlying asset and generally represent future commitments that have a reasonable possibility of being settled in cash or through physical delivery. The financial instruments are traded on an exchange and are standardized contracts.

Market risk is the potential for changes in the value of the financial instruments traded by the Master Fund due to market changes, including fluctuations in currency prices. In entering into these futures contracts, there exists a market risk that such futures contracts may be significantly influenced by adverse market conditions, resulting in such futures contracts being less valuable. If the markets should move against all of the futures contracts at the same time, the Master Fund could experience substantial losses.

Credit risk is the possibility that a loss may occur due to the failure of an exchange clearinghouse to perform according to the terms of a futures contract. Credit risk with respect to exchange-traded instruments is reduced to the extent that an exchange or clearing organization acts as a counterparty to the transactions. The Master Fund’s risk of loss in the event of counterparty default is typically limited to the amounts recognized in the consolidated statement of financial condition and not represented by the futures contract or notional amounts of the instruments.

The Fund and the Master Fund have not utilized, nor do they expect to utilize in the future, special purpose entities to facilitate off-balance sheet financing arrangements and have no loan guarantee arrangements or off-balance sheet arrangements of any kind, other than agreements entered into in the normal course of business noted above.

(7) Share Purchases and Redemptions

(a) Purchases

Shares may be purchased from the Fund only by Authorized Participants in one or more blocks of 200,000 Shares, called a Basket. The Fund issues Shares in Baskets only to Authorized Participants continuously as of noon, New York time, on the business day immediately following the date on which a valid order to create a Basket is accepted by the Fund, at the net asset value of 200,000 Shares as of the closing time of the NYSE Arca or the last to close of the exchanges on which the Master Fund’s assets are traded, whichever is later, on the date that a valid order to create a Basket is accepted by the Fund.

23

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements—(Continued)

September 30, 2010

Each Share issued by the Fund correlates with a Master Fund Unit issued by the Master Fund and held by the Fund. Master Fund Units may only be created by the Fund.

(b) Redemptions

On any business day, an Authorized Participant may place an order with the Managing Owner to redeem one or more Baskets. Redemption orders must be placed by 1:00 p.m., New York time. The day on which the Managing Owner receives a valid redemption order is the redemption order date. Redemption orders are irrevocable. The redemption procedures allow Authorized Participants to redeem Baskets. Individual shareholders may not redeem directly from the Fund.

By placing a redemption order, an Authorized Participant agrees to deliver the Baskets to be redeemed through The Depository Trust Company’s (the “DTC”) book-entry system to the Fund not later than noon, New York time, on the business day immediately following the redemption order date. By placing a redemption order, and prior to receipt of the redemption proceeds, an Authorized Participant’s DTC account is charged the non-refundable transaction fee due for the redemption order.

The redemption proceeds from the Fund consist of the cash redemption amount. The cash redemption amount is equal to the net asset value of the number of Basket(s) requested in the Authorized Participant’s redemption order as of the closing time of the NYSE Arca or the last to close of the exchanges on which the Master Fund’s assets are traded, whichever is later, on the redemption order date. The Fund will distribute the cash redemption amount at noon, New York time, on the business day immediately following the redemption order date through DTC to the account of the Authorized Participant as recorded on DTC’s book-entry system.

The redemption proceeds due from the Fund are delivered to the Authorized Participant at noon, New York time, on the business day immediately following the redemption order date if, by such time on such business day immediately following the redemption order date, the Fund’s DTC account has been credited with the Baskets to be redeemed. If the Fund’s DTC account has not been credited with all of the Baskets to be redeemed by such time, the redemption proceeds are delivered to the extent of whole Baskets received. Any remainder of the redemption proceeds are delivered on the next business day to the extent of remaining whole Baskets received if the Managing Owner receives the fee applicable to the extension of the redemption distribution date which the Managing Owner may, from time-to-time, determine and the remaining Baskets to be redeemed are credited to the Fund’s DTC account by noon, New York time, on such next business day. Any further outstanding amount of the redemption order will be canceled. The Managing Owner is also authorized to deliver the redemption proceeds notwithstanding that the Baskets to be redeemed are not credited to the Fund’s DTC account by noon, New York time, on the business day immediately following the redemption order date if the Authorized Participant has collateralized its obligation to deliver the Baskets through DTC’s book-entry system on such terms as the Managing Owner may from time-to-time agree upon.

Each Share redeemed by the Fund correlates with a Master Fund Unit redeemed by the Master Fund. Master Fund Units may only be redeemed by the Fund.

(c) Share Transactions

Summary of Share Transactions for the Three Months Ended September 30, 2010 and 2009

and the Nine Months Ended September 30, 2010 and 2009

	Shares						Paid in Capital						Shares						Paid in Capital
	Three Months Ended						Three Months Ended						Nine Months Ended						Nine Months Ended
	September 30, 2010			September 30, 2009			September 30, 2010			September 30, 2009			September 30, 2010			September 30, 2009			September 30, 2010			September 30, 2009
Shares Sold*		800,000			2,600,000		$	20,922,508		$	72,156,930			4,000,000			10,200,000		$	101,764,730		$	269,333,168
Shares Redeemed*		(1,000,000	)		(1,400,000	)		(25,840,264	)		(38,842,374	)		(9,400,000	)		(4,800,000	)		(246,514,954	)		(126,085,396	)
Net Increase (Decrease)		(200,000	)		1,200,000		$	(4,917,756	)	$	33,314,556			(5,400,000	)		5,400,000		$	(144,750,224	)	$	143,247,772

* Each Share sold and redeemed by the Fund correlates with a Master Fund Unit issued and redeemed by the Master Fund. Master Fund Units may be created or redeemed only by the Fund.

(8) Profit and Loss Allocations and Distributions

The Master Fund is wholly-owned by the Fund and the Managing Owner. Each Share issued by the Fund correlates with a Master Fund Unit issued by the Master Fund and held by the Fund.

24

PowerShares DB US Dollar Index Bearish Fund and Subsidiary

Notes to Unaudited Consolidated Financial Statements—(Continued)

September 30, 2010

Pursuant to the Amended and Restated Declaration of Trust and Trust Agreement of the Master Trust, income and expenses are allocated pro rata to the Managing Owner as holder of the General Shares and to the Shareholders monthly based on their respective percentage interests as of the close of the last trading day of the preceding month. Any losses allocated to the Managing Owner (as the owner of the General Shares) which are in excess of the Managing Owner’s capital balance are allocated to the Shareholders in accordance with their respective interest in the Master Fund as a percentage of total shareholders’ equity. Distributions (other than redemption of units) may be made at the sole discretion of the Managing Owner on a pro rata basis in accordance with the respective capital balances of the shareholders.

(9) Commitments and Contingencies

The Managing Owner, either in its own capacity or in its capacity as the Managing Owner and on behalf of the Fund and the Master Fund, has entered into various service agreements that contain a variety of representations, or provide indemnification provisions related to certain risks service providers undertake in performing services which are in the best interests of the Funds. As of September 30, 2010, no claims had been received by the Fund or the Master Fund and it was therefore not possible to estimate the Fund’s and the Master Fund’s potential future exposure under such indemnification provisions.

(10) Net Asset Value and Financial Highlights

The Fund is presenting the following net asset value and financial highlights related to investment performance for a Share outstanding for the Three Months Ended September 30, 2010 and 2009 and for the Nine Months Ended September 30, 2010 and 2009. The net investment income and total expense ratios are calculated using average net asset value. The net asset value presentation is calculated using daily Shares outstanding. The net investment income and total expense ratios have been annualized. The total return is based on the change in net asset value of the Shares during the period. An individual investor’s return and ratios may vary based on the timing of capital transactions.

The Fund invests substantially all of its assets in the Master Fund in a master-feeder structure. The Fund holds no investment assets other than Master Fund Limited Units. The Fund is the majority Master Fund Limited Unit owner and the Managing Owner holds a non-controlling interest in the Master Fund. Each Share issued by the Fund correlates with the Master Fund Limited Unit issued by the Master Fund and held by the Fund.

Net asset value per Master Fund Limited Unit and Master Fund General Unit (collectively, “Master Fund Units”) is the net asset value of the Master Fund divided by the number of outstanding Master Fund Units. Because there is a one-to-one correlation between Shares and the Master Fund Limited Units, the net asset value per Share and the net asset value per Master Fund Limited Unit are equal.

	Three Months Ended						Nine Months Ended
	September 30, 2010			September 30, 2009			September 30, 2010			September 30, 2009
Net Asset Value
Net asset value per Share, beginning of period	$	24.87		$	26.76		$	27.57		$	26.17
Net realized and change in unrealized gain (loss) on United States Treasury Obligations and Futures		2.23			1.25			(0.37	)		1.89
Net investment income (loss)		(0.04	)		(0.03	)		(0.14	)		(0.08	)
Net income (loss)		2.19			1.22			(0.51	)		1.81
Net asset value per Share, end of period	$	27.06		$	27.98		$	27.06		$	27.98
Market value per Share, beginning of period	$	24.84		$	26.75		$	27.54		$	26.18
Market value per Share, end of period	$	27.06		$	27.93		$	27.06		$	27.93
Ratio to average Net Assets*
Net investment income (loss)		(0.67	)%		(0.40	)%		(0.70	)%		(0.40	)%
Total expenses		0.80	%		0.55	%		0.80	%		0.55	%
Total Return, at net asset value **		8.81	%		4.56	%		(1.85	)%		6.92	%
Total Return, at market value **		8.94	%		4.41	%		(1.74	)%		6.68	%

* Percentages are annualized.

** Percentages are not annualized.

(11) Subsequent Events

The Fund evaluated the need for disclosures and/or adjustments resulting from subsequent events through the date the financial statements were issued. This evaluation did not result in any subsequent events that necessitated disclosures and/or adjustments.

25

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

This information should be read in conjunction with the consolidated financial statements and notes included in Item 1 of Part I of this Quarterly Report (the “Report”). The discussion and analysis which follows may contain trend analysis and other forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 which reflect our current views with respect to future events and financial results. Words such as “anticipate,” “expect,” “intend,” “plan,” “believe,” “seek,” “outlook” and “estimate,” as well as similar words and phrases, signify forward-looking statements. PowerShares DB US Dollar Index Bearish Fund’s forward-looking statements are not guarantees of future results and conditions and important factors, risks and uncertainties may cause our actual results to differ materially from those expressed in our forward-looking statements.

You should not place undue reliance on any forward-looking statements. Except as expressly required by the Federal securities laws, DB Commodity Services LLC (the “Managing Owner”), undertakes no obligation to publicly update or revise any forward-looking statements or the risks, uncertainties or other factors described in this Report, as a result of new information, future events or changed circumstances or for any other reason after the date of this Report.

Overview/Introduction

The Fund invests substantially all of its assets in the Master Fund in a master-feeder structure. The Fund holds no investment assets other than Master Fund Units. The Master Fund is wholly-owned by the Fund and the Managing Owner. Each Share issued by the Fund correlates with a Master Fund Unit issued by the Master Fund and held by the Fund.

The Fund, through the Master Fund, establishes short positions in certain futures contracts (the “DX Contracts”), with a view to tracking the changes, whether positive or negative, in the level of the Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Excess Return, the Short Index or the Index, over time. The performance of the Fund also is intended to reflect the excess, if any, of its Master Fund’s interest income from its holdings of United States Treasury Obligations and other high credit quality short-term fixed income securities over the expenses of the Fund and the Master Fund. The Index is calculated to reflect the changes in market value over time, whether positive or negative, of short positions in DX Contracts. DX Contracts are traded through the currency markets of ICE Futures U.S. (formerly known as the New York Board of Trade^®), under the symbol “DX.” The changes in market value over time, whether positive or negative, of the DX Contracts are related to the changes, whether positive or negative, in the level of the U.S. Dollar Index^® (the “USDX^®”). The Index provides a general indication of the international value of the U.S. dollar relative to the six major world currencies (the “Index Currencies”), which comprise the USDX^® — Euro, Japanese Yen, British Pound, Canadian Dollar, Swedish Krona and Swiss Franc.

The Shares are designed for investors who want a cost-effective and convenient way to invest in a group of currency futures on U.S. and non-U.S. markets.

The USDX^® mark is a registered service mark owned by ICE Futures U.S., Inc.

As of the date of this Report, the DX Contracts are not subject to speculative position limits. There can be no assurance that the DX Contracts will not become subject to speculative position limits. Should the Fund become subject to speculative position limits with respect to its DX Contracts holdings, the Fund’s ability to issue new Baskets or the Fund’s ability to reinvest income in additional DX Contracts may be limited to the extent that these activities would cause the Fund to exceed the potential future position limits. Limiting the size of the Fund may affect the correlation between the price of the Shares, as traded on the NYSE Arca, and the net asset value of the Fund. That is, the inability to create additional Baskets could result in Shares trading at a premium or discount to the net asset value of the Fund.

If the Managing Owner determines in its commercially reasonable judgment that it has become impracticable or inefficient for any reason for the Fund to gain full or partial exposure to the DX Contracts, the Fund may:

• invest in a different month DX Contract other than the specific DX Contract that was originally required by the Index, or

• invest in another futures contract substantially similar to the DX Contracts, if available, or

• invest in the futures contracts referencing the Index Currencies, or

• invest in a forward agreement, swap, or other OTC derivative referencing the Index Currencies, if, in the commercially reasonable judgment of the Managing Owner, such above instruments tend to exhibit trading prices that correlate with the DX Contract.

26

The Fund is an index tracking fund and does not utilize any trading system, whether discretionary, systematic or otherwise. The Index is calculated to reflect the changes in market value over time, whether positive or negative, of short positions in DX Contracts. In turn, the Master Fund seeks to track the Index by establishing short positions in DX Contracts accordingly. Therefore, the Managing Owner serves in an administrative role in order to ensure that the Fund invests in a manner that seeks to track the Index.

Index Description

The Index is designed to reflect the changes in market value over time, whether positive or negative, from investing in the first to expire DX Contracts whose changes in market value over time, whether positive or negative, in turn, are tied to the USDX^®. The first to expire DX Contracts are the futures contracts that expire in March, June, September and December. DX Contracts are traded exclusively through ICE Futures U.S., under the symbol “DX.”

The changes in market value over time, whether positive or negative, of DX Contracts are related to the Index Currencies. (Although the Index tracks the changes in market value over time, whether positive or negative, of short positions in the first to expire DX Contracts, the closing level of the Index is in effect, and in part, a reflection of the changes, whether positive or negative, in the level of the U.S. dollar relative to a basket of the underlying Index Currencies.) The Index Currencies are Euro, Japanese Yen, British Pound, Canadian Dollar, Swedish Krona and Swiss Franc. The Index Currencies represent the currencies of the major trading partners of the U.S. (and represent the currencies of 17 countries, 12 countries of the Euro zone plus five other countries).

The USDX^® is composed of notional amounts of each Index Currency. The notional amounts of the Index Currencies included in the USDX^® reflect a geometric weighted average of the change in the Index Currencies’ exchange rates against the U.S. dollar relative to March 1973. March 1973 was chosen as the base period of the USDX^® because it represents a significant milestone in foreign exchange history when the world’s major trading nations allowed their currencies to float freely against each other.

The fair value of DX Contracts is based on foreign exchange futures prices for the underlying Index Currencies. The fair value of DX Contracts is calculated in the same way as a spot index. DX Contracts, similar to single currency futures contracts, will trade at a forward premium or discount based on the interest rate differential between the U.S. dollar and the Index Currencies.

Volatility of the USDX^® has been historically comparable in range and variability to a broad-based, multi-capitalization stock index future. The DX Contract price is sized at $1,000 times the USDX^® closing level. Thus, if the USDX^® closing level is 100.00, the DX Contract will be valued $100,000. If the USDX^® closing level is 112.50, each DX Contract will have a $112,500 value.

The sponsor of the Short Index is Deutsche Bank AG London, or the Index Sponsor.

USDX ^® Composition

The Index reflects the changes in market value over time, whether positive or negative, of short positions in the first to expire DX Contracts. In turn, the changes in market value over time, whether positive or negative, of DX Contracts are related to the changes, positive and negative, in the level of the USDX^®.

The USDX^® provides a general indication of the international value of the U.S. dollar and is composed of notional amounts of each of the Index Currencies. The notional amounts of each Index Currency included in the USDX^® are weighted to reflect the currencies of the largest trading partners of the U.S. These largest trading partners constitute the bulk of international trade with the United States and have well-developed foreign exchange markets with rates freely determined by market participants. In addition, many currencies not included in the USDX^® move in close correlation with those that are included. The USDX^® is computed 24 hours a day, seven days a week based on exchange rates supplied to Reuters by some 500 banks worldwide.

The following table reflects the index base weights (the “Index Base Weights”) of each Index Currency as of March 1973 with respect to the USDX^®:

Index Currency	Index Base Weight (%)
Euro		57.60
Japanese Yen		13.60
British Pound		11.90
Canadian Dollar		9.10
Swedish Krona		4.20
Swiss Franc		3.60
Closing Level at Inception:		100.00

The USDX^® has been calculated since inception in March 1973. The closing level at inception was 100.00.

27

The Euro was included in the USDX^® in 1999 and replaced the following currencies that were originally included in the USDX^®: Belgian Franc, Dutch Guilder, German Mark, French Franc and Italian Lira.

Please see http://dbfunds.db.com/udn/weights.aspx with respect to the most recently available weighted composition of the Fund and http://dbfunds.db.com/udn/index.aspx with respect to the composition of the Index on the Base Date.

Index Calculation

The Index reflects the changes in market value over time, whether positive or negative, of short positions in the first to expire DX Contracts relative to the value of the dollar as of December 31, 1986 (the “Base Date”) , which expire in March, June, September and December. On the Base Date, the closing level was 100.00. Although the DX Contract started trading in 1985, the Base Date of December 31, 1986 was selected because reasonably reliable pricing data was not available prior to December 31, 1986. A quote of “105.50” means the U.S. dollar’s value has risen 5.50% since the Base Date relative to the underlying basket of Index Currencies which comprise the USDX^®.

The Index Sponsor calculates the closing level of each Index on both an excess return basis and a total return basis. The excess return index reflects the changes in market value over time, whether positive or negative, of the DX Contracts. The total return is the sum of the changes in market value over time, whether positive or negative, of the DX Contracts plus the return of 3-month U.S. Treasury bills. The closing levels of the Index have been calculated using historic exchange closing price data of the DX Contracts since the Base Date.

The use of short positions on DX Contracts in the construction of the Short Index causes the Short Index to rise as a result of any downward price movement in the DX Contracts. In turn, this appreciation in the short DX Contracts reflects the fall of the U.S. dollar relative to the underlying basket of Index Currencies which comprise the USDX^®.

Since the Base Date, the Short Index closing level has ranged on a daily basis from as high as 153.28 on April 22, 2008 to as low as 91.91 on July 5, 2001. Past Index levels are not necessarily indicative of future Index levels.

Index Rolls and Rebalancing of the USDX^®

The underlying DX Contracts of the Index are rolled quarterly over three consecutive business days starting on the Wednesday prior to the applicable IMM Date (each an “Index Roll Day”). “IMM Date” means the third Wednesday of March, June, September and December, a traditional settlement date in the International Money Market.

DX Contracts are rolled on each Index Roll Day as follows:

• On each Index Roll Day, 1/3 of the DX Contracts that will expire on the next IMM Date is sold and positions in the DX Contracts that expire on the IMM Date following the next IMM Date are purchased.

• On each Index Roll Day, new notional holdings are calculated for the old DX Contracts leaving the Index as well as the new DX Contracts entering an Index.

• On all days that are not Index Roll Days, the notional holdings of the DX Contracts in the Index remain constant.

There are no regularly scheduled adjustments or rebalancings of the USDX^®. The USDX^® has only been adjusted once, when the Euro was introduced as the common currency for the European Union (EU) bloc of countries. Without any other adjustments, the combination of components and their respective weightings in the USDX^® have yielded performance results similar to other commonly used US dollar indexes, whether those index methodologies are based on trade weights or capital flow weights.

General

Under the Amended and Restated Declaration of Trust and Trust Agreement of each of the Trust and the Master Trust (the “Trust Agreements”), Wilmington Trust Company, the Trustee of the Trust and the Master Trust, has delegated to the Managing Owner the exclusive management and control of all aspects of the business of the Trust, the Fund, and the Master Trust and Master Fund. The Trustee will have no duty or liability to supervise or monitor the performance of the Managing Owner, nor will the Trustee have any liability for the acts or omissions of the Managing Owner.

The Index Sponsor obtains information for inclusion in, or for use in the calculation of, the Index from sources the Index Sponsor considers reliable. None of the Index Sponsor, the Managing Owner, the Trust, the Fund, the Master Trust, and the Master Fund or any of their respective affiliates accepts responsibility for or guarantees the accuracy and/or completeness of the Index or any data included in the Index.

28

The Shares are intended to provide investment results that generally correspond to the changes, positive or negative, in the levels of the Index over time. The value of the Shares is expected to fluctuate in relation to changes in the value of the Master Fund’s portfolio. The market price of the Shares may not be identical to the net asset value per Share, but these two valuations are expected to be very close.

Performance Summary

This report covers the three months ended September 30, 2010 and 2009 (hereinafter referred to as the “Three Months Ended September 30, 2010” and the “Three Months Ended September 30, 2009”, respectively) and the Nine Months Ended September 30, 2010 and 2009 (hereinafter referred to as the “Nine Months Ended September 30, 2010” and the “Nine Months Ended September 30, 2009”, respectively). The Fund commenced trading on the American Stock Exchange (now known as the NYSE Alternext US LLC (the “NYSE Alternext”)) on February 20, 2007, and, as of November 25, 2008, is listed on the NYSE Arca, Inc. (the “NYSE Arca”).

Performance of the Fund and the exchange traded Shares are detailed below in “Results of Operations”. Past performance of the Fund is not necessarily indicative of future performance.

The Index provides a general indication of the international value of the U.S. dollar relative to the six major world currencies (the “Index Currencies”), which comprise the USDX^® — Euro, Japanese Yen, British Pound, Canadian Dollar, Swedish Krona and Swiss Franc. The Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Total Return (Short Index-TR), consists of the Index plus 3-month United States Treasury bills returns. Past Index results are not necessarily indicative of future changes, positive or negative, in the Index closing levels.

The section “Summary of Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Total Return and Underlying DX Contract Returns for the Three Months Ended September 30, 2010 and 2009 and the Nine Months Ended September 30, 2010 and 2009” below provides an overview of the changes in the closing levels of the Index by disclosing the change in closing levels of the Index itself and the underlying DX Contracts of the Index. Please note also that the Fund’s objective is to track the Index (not the Short Index-TR™) and the Fund does not attempt to outperform or underperform the Index.

Summary of Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Total Return and Underlying DX Contract

Returns for the Three Months Ended September 30, 2010 and 2009 and the Nine Months Ended September 30, 2010 and 2009

Underlying Index	Aggregate returns for the SHORT INDEX-TR
	Three Months Ended September 30, 2010			Three Months Ended September 30, 2009			Nine Months Ended September 30, 2010			Nine Months Ended September 30, 2009
DX Contract		9.14	%		5.07	%		(1.25	)%		7.91	%

If the Fund’s interest income from its holdings of fixed income securities were to exceed the Fund’s fees and expenses, the aggregate return on an investment in the Fund is expected to outperform the Index and underperform the Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Total Return (the “Short Index-TR”). The only difference between the Index and the Short Index-TR is that the Index does not include interest income from a hypothetical basket of fixed income securities while the Short Index-TR does include such a component. The difference between the Index and the Short Index-TR is attributable entirely to the hypothetical interest income from this hypothetical basket of fixed income securities. If the Fund’s interest income from its holdings of fixed income securities exceeds the Fund’s fees and expenses, then the amount of such excess is expected to be distributed periodically. The market price of the Shares is expected to closely track the Index. The aggregate return on an investment in the Fund over any period is the sum of the capital appreciation or depreciation of the Shares over the period, plus the amount of any distributions during the period. Consequently, the Fund’s aggregate return is expected to outperform the Index by the amount of the excess, if any, of its interest income over its fees and expenses but, as a result of the Fund’s fees and expenses, the aggregate return on the Fund is expected to underperform the Short Index-TR. If the Fund’s fees and expenses were to exceed the Fund’s interest income from its holdings of fixed income securities, the aggregate return on an investment in the Fund is expected to underperform the Index.

Net Asset Value

Net asset value means the total assets of the Master Fund, including, but not limited to, all futures, cash and investments less total liabilities of the Master Fund, each determined on the basis of U.S. generally accepted accounting principles, consistently applied under the accrual method of accounting. In particular, net asset value includes any unrealized appreciation or depreciation on open currency futures contracts, and any other credit or debit accruing to the Master Fund but unpaid or not received by the Master Fund. All open currency futures contracts will be calculated at their then current market value, which will be based upon the settlement price for that particular currency futures contract traded on the applicable exchange on the date with respect to which net asset value is being determined; provided, that if a currency futures contract could not be liquidated on such day, due to the operation of daily limits

29

or other rules of the exchange upon which that position is traded or otherwise, the settlement price on the most recent day on which the position could have been liquidated will be the basis for determining the market value of such position for such day. The Managing Owner may in its discretion (and only under extraordinary circumstances, including, but not limited to, periods during which a settlement price of a futures contract is not available due to exchange limit orders or force majeure type events such as systems failure, natural or man-made disaster, act of God, armed conflict, act of terrorism, riot or labor disruption or any similar intervening circumstance) value any asset of the Master Fund pursuant to such other principles as the Managing Owner deems fair and equitable so long as such principles are consistent with normal industry standards. Interest earned on the Master Fund’s brokerage account is accrued monthly. The amount of any distribution is a liability of the Master Fund from the day when the distribution is declared until it is paid.

The Fund invests substantially all of its assets in the Master Fund in a master-feeder structure. The Fund holds no investment assets other than Master Fund Limited Units. The Fund is the majority Master Fund Limited Unit owner and the Managing Owner holds a non-controlling interest in the Master Fund. Each Share issued by the Fund correlates with the Master Fund Limited Unit issued by the Master Fund and held by the Fund.

Net asset value per Master Fund Limited Unit and Master Fund General Unit (collectively, “Master Fund Units”) is the net asset value of the Master Fund divided by the number of outstanding Master Fund Units. Because there is a one-to-one correlation between Shares and the Master Fund Limited Units, the net asset value per Share and the net asset value per Master Fund Limited Unit are equal.

Critical Accounting Policies

The Fund’s and Master Fund’s critical accounting policies are as follows:

Preparation of the financial statements and related disclosures in conformity with U.S. generally accepted accounting principles requires the application of appropriate accounting rules and guidance, as well as the use of estimates, and requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenue and expense and related disclosure of contingent assets and liabilities during the reporting period of the consolidated financial statements and accompanying notes. Both the Fund’s and the Master Fund’s application of these policies involve judgments and actual results may differ from the estimates used.

The Master Fund holds a significant portion of its assets in currency futures contracts and United States Treasury Obligations, both of which are recorded on a trade date basis and at fair value in the consolidated financial statements, with changes in fair value reported in the consolidated statement of income and expenses.

The use of fair value to measure financial instruments, with related unrealized gains or losses recognized in earnings in each period is fundamental to the Fund’s financial statements. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (the exit price).

In determining fair value of United States Treasury Obligations and currency futures contracts, the Fund uses unadjusted quoted market prices in active markets. FASB fair value measurement and disclosure guidance requires a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The objective of a fair value measurement is to determine the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). The hierarchy gives the highest priority to unadjusted quoted prices for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. See Note 4(c) within the financial statements in Item 1 for further information.

When market closing prices are not available, the Managing Owner may value an asset of the Master Fund pursuant to policies the Managing Owner has adopted, which are consistent with normal industry standards.

Realized gains (losses) and changes in unrealized gain (loss) on open positions are determined on a specific identification basis and recognized in the consolidated statement of income and expenses in the period in which the contract is closed or the changes occur, respectively.

Interest income on United States Treasury Obligations is recognized on an accrual basis when earned. Premiums and discounts are amortized or accreted over the life of the United States Treasury Obligations.

30

Market Risk

Trading in futures contracts involves the Master Fund entering into contractual commitments to purchase or sell a particular currency at a specified date and price. The market risk associated with the Master Fund’s commitments to purchase currencies is limited to the gross or face amount of the contracts held.

The Master Fund’s exposure to market risk is also influenced by a number of factors including the volatility of interest rates and foreign currency exchange rates, the liquidity of the markets in which the contracts are traded and the relationships among the contracts held. The inherent uncertainty of the Master Fund’s trading as well as the development of drastic market occurrences could ultimately lead to a loss of all or substantially all of the investors’ capital.

Credit Risk

When the Master Fund enters into futures contracts, the Master Fund will be exposed to credit risk that the counterparty to the contract will not meet its obligations. The counterparty for futures contracts traded on United States exchanges is the clearing house associated with the particular exchange. In general, clearing houses are backed by their corporate members who may be required to share in the financial burden resulting from the nonperformance by one of their members and, as such, should significantly reduce this credit risk. In cases where the clearing house is not backed by the clearing members (i.e., some foreign exchanges), it may be backed by a consortium of banks or other financial institutions. There can be no assurance that any counterparty, clearing member or clearinghouse will meet its obligations to the Master Fund.

The Commodity Broker, when acting as the Master Fund’s futures commission merchant in accepting orders for the purchase or sale of domestic futures contracts, is required by CFTC regulations to separately account for and segregate as belonging to the Master Fund all assets of the Master Fund relating to domestic futures trading and the Commodity Broker is not allowed to commingle such assets with other assets of the Commodity Broker. In addition, CFTC regulations also require the Commodity Broker to hold in a secure account assets of the Master Fund related to foreign futures trading.

Liquidity

All of the Master Fund’s source of capital is derived from the Fund through the Fund’s offering of Shares to Authorized Participants. Authorized Participants may then subsequently redeem such Shares. The Master Fund in turn allocates its net assets to currency futures trading. A significant portion of the net asset value is held in United States Treasury Obligations and cash, which is used as margin for the Master Fund’s trading in currency futures. The percentage that United States Treasury Obligations bear to the total net assets will vary from period to period as the market values of the Master Fund’s currency futures change. The balance of the net assets are held in the Master Fund’s trading account. Interest earned on the Master Fund’s interest-bearing funds is paid to the Master Fund.

The Master Fund’s currency futures contracts may be subject to periods of illiquidity because of market conditions, regulatory considerations or for other reasons. For example, commodity exchanges may limit fluctuations in certain futures contract prices during a single day by regulations referred to as “daily limits.” During a single day, no trades may be executed at prices beyond the daily limit. Once the price of a particular futures contract has increased or decreased by an amount equal to the daily limit, positions in the future can neither be taken nor liquidated unless the traders are willing to effect trades at or within the limit. Although the DX Contracts that the Master Fund invests in are not currently subject to daily limits, the DX Contracts held by the Master Fund could become subject to such limits in the future. Such market conditions could prevent the Master Fund from promptly liquidating its currency futures positions.

On any business day, an Authorized Participant may place an order with the Managing Owner to redeem one or more Baskets. Redemption orders must be placed by 1:00 p.m., New York time. The day on which the Managing Owner receives a valid redemption order is the redemption order date. Redemption orders are irrevocable. The redemption procedures allow Authorized Participants to redeem Baskets. Individual Shareholders may not redeem directly from the Fund. By placing a redemption order, an Authorized Participant agrees to deliver the Baskets to be redeemed through DTC’s book-entry system to the Fund no later than noon, New York time, on the business day immediately following the redemption order date. By placing a redemption order, and prior to receipt of the redemption proceeds, an Authorized Participant’s DTC account is charged the non-refundable transaction fee due for the redemption order.

Cash Flows

The primary cash flow activity of the Fund is to raise capital from Authorized Participants through the issuance of Shares. This cash is invested into the Master Fund where it is used to invest in United States Treasury Obligations and to meet margin requirements as a result of the positions taken in DX Contracts to match the fluctuations of the Index the Fund is tracking.

31

Operating Activities

Net cash flow provided by and (used for) operating activities was $125.2 million and $(185.1) million for the Nine Months Ended September 30, 2010 and 2009, respectively. This amount primarily includes net purchases and sales of United States Treasury Obligations which are held at fair value on the statement of financial condition.

During the Nine Months Ended September 30, 2010, $534.8 million was paid to purchase United States Treasury Obligations and $683.0 million was received from sales and maturing contracts. During the Nine Months Ended September 30, 2009, $816.7 million was paid to purchase United States Treasury Obligations and $610.0 million was received from sales and maturing contracts. Unrealized appreciation on United States Treasury Obligations and futures increased by $15.0 million and decreased by $1.8 million during the Nine Months Ended September 30, 2010 and 2009, respectively.

Financing Activities

The Fund’s net cash flow provided by and (used for) financing activities was $(144.8) million and $143.2 million during the Nine Months Ended September 30, 2010 and 2009, respectively. This included $101.8 million and $ 269.3 million from the sale of Shares to Authorized Participants during the Nine Months Ended September 30, 2010 and 2009, respectively.

Results of Operations

FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2010 AND 2009 AND THE NINE MONTHS ENDED SEPTEMBER 30, 2010 AND 2009

The Fund was launched on February 15, 2007 at $25.00 per Share. The Shares traded on the NYSE Alternext from February 20, 2007 to November 25, 2008 and have been trading on the NYSE Arca since November 25, 2008.

The Fund and the Master Fund seek to track changes in the closing levels of the Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Excess Return, the Short Index or the Index, over time, plus the excess, if any, of the Master Fund’s interest income from its holdings of United States Treasury Obligations and other high credit quality short-term fixed income securities over the expenses of the Fund and the Master Fund. The following graphs illustrate changes in (i) the price of the Shares (as reflected by the graph “UDN”), (ii) the Fund’s NAV (as reflected by the graph “UDNNV”), and (iii) the closing levels of the Index (as reflected by the graph “USDDNX”). Whenever the interest income earned by the Fund exceeds Fund expenses, the price of the Shares generally exceeds the levels of the Index primarily because the Share price reflects interest income from the Master Fund’s collateral holdings whereas the Index does not consider such interest income. There can be no assurances that the price of the Shares will continue to exceed the Index levels.

The Index is a set of rules applied to a body of data and does not represent the results of actual investment or trading. The Index is frictionless, in that it does not take into account fees or expenses associated with investing in the Fund. Also, because it does not represent actual futures positions, the Index is not subject to, and does not take into account the impact of, speculative position limits (if applicable) or certain other similar limitations on the ability of the Fund to trade the DX Contracts. The “TR” version of the Index includes an assumed amount of interest income based on prevailing rates that is adjusted from time to time. The Fund, by contrast, invests actual money and trades actual futures contracts. As a result, the performance of the Fund involves friction, in that fees and expenses impose a drag on performance. The Fund may be subject to speculative position limits (if applicable) and certain other limitations on its ability to trade the DX Contracts, which may compel the Fund to trade futures or other instruments that are not the DX Contracts as proxies for the DX Contracts. The interest rate actually earned by the Fund over any period may differ from the assumed amount of interest income factored into the “TR” version of the Index over the same period. All of these factors can contribute to discrepancies between changes in net asset value per Share and changes in the level of the Index over any period of time. Fees and expenses always will tend to cause changes in the net asset value per Share to underperform changes in the value of the Index over any given period, all other things being equal. Actual interest income could be higher or lower than the assumed interest income factored into the “TR” version of the Index, and therefore could cause changes in the net asset value per Share to outperform or underperform changes in the value of the Index over any given period, all other things being equal. Similarly, trading futures or other instruments that are not the DX Contracts as proxies for the DX Contracts could cause changes in the net asset value per Share to outperform or underperform changes in the value of the Index over any given period, all other things being equal.

32

COMPARISON OF UDN, UDNNV AND USDDNX FOR THE THREE MONTHS ENDED

SEPTEMBER 30, 2010 AND 2009 AND THE NINE MONTHS ENDED SEPTEMBER 30, 2010 AND 2009

NEITHER THE PAST PERFORMANCE OF THE FUND NOR THE PRIOR INDEX LEVELS AND CHANGES, POSITIVE

OR NEGATIVE, SHOULD BE TAKEN AS AN INDICATION OF THE FUND’S FUTURE PERFORMANCE.

NEITHER THE PAST PERFORMANCE OF THE FUND NOR THE PRIOR INDEX LEVELS AND CHANGES, POSITIVE

OR NEGATIVE, SHOULD BE TAKEN AS AN INDICATION OF THE FUND’S FUTURE PERFORMANCE.

See Additional Legends below.

33

NEITHER THE PAST PERFORMANCE OF THE FUND NOR THE PRIOR INDEX LEVELS AND CHANGES, POSITIVE

OR NEGATIVE, SHOULD BE TAKEN AS AN INDICATION OF THE FUND’S FUTURE PERFORMANCE.

NEITHER THE PAST PERFORMANCE OF THE FUND NOR THE PRIOR INDEX LEVELS AND CHANGES, POSITIVE

OR NEGATIVE, SHOULD BE TAKEN AS AN INDICATION OF THE FUND’S FUTURE PERFORMANCE.

See Additional Legends below.

34

Additional Legends

Deutsche Bank Short US Dollar Index (USDX^®) Futures Index – Excess Return is an index and does not reflect (i) actual trading and (ii) any fees or expenses.

WHILE THE FUND’S OBJECTIVE IS NOT TO GENERATE PROFIT THROUGH ACTIVE PORTFOLIO MANAGEMENT, BUT IS TO TRACK THE INDEX, BECAUSE THE INDEX WAS ESTABLISHED IN AUGUST 2006, CERTAIN INFORMATION RELATING TO THE INDEX CLOSING LEVELS MAY BE CONSIDERED TO BE “HYPOTHETICAL.” HYPOTHETICAL INFORMATION MAY HAVE CERTAIN INHERENT LIMITATIONS, SOME OF WHICH ARE DESCRIBED BELOW.

WITH RESPECT TO INDEX DATA, NO REPRESENTATION IS BEING MADE THAT THE INDEX WILL OR IS LIKELY TO ACHIEVE ANNUAL OR CUMULATIVE CLOSING LEVELS CONSISTENT WITH OR SIMILAR TO THOSE SET FORTH HEREIN. SIMILARLY, NO REPRESENTATION IS BEING MADE THAT THE FUND WILL GENERATE PROFITS OR LOSSES SIMILAR TO THE FUND’S PAST PERFORMANCE OR THE HISTORICAL ANNUAL OR CUMULATIVE CHANGES IN THE INDEX CLOSING LEVELS. IN FACT, THERE ARE FREQUENTLY SHARP DIFFERENCES BETWEEN HYPOTHETICAL RESULTS AND THE ACTUAL RESULTS SUBSEQUENTLY ACHIEVED BY INVESTMENT METHODOLOGIES, WHETHER ACTIVE OR PASSIVE.

WITH RESPECT TO INDEX DATA, ONE OF THE LIMITATIONS OF HYPOTHETICAL INFORMATION IS THAT IT IS GENERALLY PREPARED WITH THE BENEFIT OF HINDSIGHT. TO THE EXTENT THAT INFORMATION PRESENTED HEREIN RELATES TO THE PERIOD DECEMBER 1986 THROUGH JULY 2006, THE INDEX CLOSING LEVELS REFLECT THE APPLICATION OF THE INDEX’S METHODOLOGY, AND SELECTION OF DX CONTRACTS, IN HINDSIGHT.

NO HYPOTHETICAL RECORD CAN COMPLETELY ACCOUNT FOR THE IMPACT OF FINANCIAL RISK IN ACTUAL TRADING. FOR EXAMPLE, THERE ARE NUMEROUS FACTORS INCLUDING THOSE DESCRIBED UNDER ITEM 1A. – “RISK FACTORS” SET FORTH IN THE FUND’S ANNUAL REPORT ON FORM 10-K/A FOR THE YEAR ENDED DECEMBER 31, 2009, RELATED TO THE CURRENCIES MARKETS IN GENERAL OR TO THE IMPLEMENTATION OF THE FUND’S EFFORTS TO TRACK THE INDEX OVER TIME WHICH CANNOT BE, AND HAVE NOT BEEN, ACCOUNTED FOR IN THE PREPARATION OF THE INDEX INFORMATION SET FORTH ON THE FOLLOWING PAGES, ALL OF WHICH CAN ADVERSELY AFFECT ACTUAL PERFORMANCE RESULTS FOR THE FUND. FURTHERMORE, THE INDEX INFORMATION DOES NOT INVOLVE FINANCIAL RISK OR ACCOUNT FOR THE IMPACT OF FEES AND COSTS ASSOCIATED WITH THE FUND.

THE MANAGING OWNER, AN INDIRECT WHOLLY OWNED SUBSIDIARY OF DEUTSCHE BANK AG, COMMENCED OPERATIONS IN JANUARY 2006. AS MANAGING OWNER, THE MANAGING OWNER AND ITS TRADING PRINCIPALS HAVE BEEN MANAGING THE DAY-TO-DAY OPERATIONS FOR THE FUND AND MANAGING FUTURES ACCOUNTS AND RELATED PRODUCTS. BECAUSE THERE ARE LIMITED ACTUAL TRADING RESULTS TO COMPARE TO THE INDEX CLOSING LEVELS SET FORTH HEREIN, PROSPECTIVE INVESTORS SHOULD BE PARTICULARLY WARY OF PLACING UNDUE RELIANCE ON THE ANNUAL OR CUMULATIVE INDEX RESULTS.

FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2010 COMPARED TO THE THREE MONTHS ENDED SEPTEMBER 30, 2009

Fund Share Price Performance

For the Three Months Ended September 30, 2010, the NYSE Arca market value of each Share increased 8.94% from $24.84 per Share to $27.06 per Share. The Share price low and high for the Three Months Ended September 30, 2010 and related change from the Share price on June 30, 2010 was as follows: Shares traded from a low of $25.29 per Share (+1.81%) on July 1, 2010 to a high of $27.06 per Share (+8.94%) on September 29, 2010 and September 30, 2010.

For the Three Months Ended September 30, 2009, the NYSE Arca market value of each Share increased 4.41% from $26.75 per Share to $27.93 per Share. The Share price low and high for the Three Months Ended September 30, 2009 and related change from the Share price on June 30, 2009 was as follows: Shares traded from a low of $26.56 per Share (-0.71%) on July 7, 2009 to a high of $28.18 per Share (+5.35%) on September 22, 2009.

Fund Share Net Asset Performance

For the Three Months Ended September 30, 2010, the net asset value of each Share increased 8.81% from $24.87 per Share to $27.06 per Share. Gains in the short DX Contract position during the Three Months Ended September 30, 2010 contributed to a 9.14% increase in the level of the Short Index-TR.

35

Net income for the Three Months Ended September 30, 2010 was $13.5 million, resulting from $0.05 million of interest income, net realized gains of $9.1 million, net unrealized gain of $4.7 million and operating expenses of $0.3 million.

For the Three Months Ended September 30, 2009, the net asset value of each Share increased 4.56% from $26.76 per Share to $27.98 per Share. Gains in the short DX Contract position during the Three Months Ended September 30, 2009 contributed to a 5.07% increase in the level of the Short Index-TR.

Net income for the Three Months Ended September 30, 2009 was $13.4 million, resulting from $0.1 million of interest income, net realized gains of $10.6 million, net unrealized gains of $3.1 million, and operating expenses of $0.4 million.

FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2010 COMPARED TO THE NINE MONTHS ENDED SEPTEMBER 30, 2009

Fund Share Price Performance

For the Nine Months Ended September 30, 2010, the NYSE Arca market value of each Share decreased 1.74% from $27.54 per Share to $27.06 per Share. The Share price high and low for the Nine Months Ended September 30, 2010 and related change from the Share price on December 31, 2009 was as follows: Shares traded from a high of $28.06 per Share (+1.89%) on January 14, 2010 to a low of $24.07 per Share (-12.60%) on June 7, 2010.

For the Nine Months Ended September 30, 2009, the NYSE Arca market value of each Share increased 6.68% from $26.18 per Share to $27.93 per Share. The Share price low and high for the Nine Months Ended September 30, 2009 and related change from the Share price on December 31, 2008 was as follows: Shares traded from a low of $24.17 per Share (-7.68%) on March 2 and on March 9, 2009 to a high of $28.18 per Share (+7.64%) on September 22, 2009.

Fund Share Net Asset Performance

For the Nine Months Ended September 30, 2010, the net asset value of each Share decreased 1.85% from $27.57 per Share to $27.06 per Share. Losses in the short DX Contract position during the Nine Months Ended September 30, 2010 contributed to a 1.25% decrease in the level of the Short Index-TR.

Net loss for the Nine Months Ended September 30, 2010 was $7.4 million, resulting from $0.1 million of interest income, net realized losses of $21.3 million, net unrealized gains of $15.0 million and operating expenses of $1.2 million.

For the Nine Months Ended September 30, 2009, the net asset value of each Share increased 6.92% from $26.17 per Share to $27.98 per Share. Gains in the short DX Contract position during the Nine Months Ended September 30, 2009 contributed to a 7.91% increase in the level of the Short Index-TR.

Net income for the Nine Months Ended September 30, 2009 was $19.7 million, resulting from $0.2 million of interest income, net realized gains of $22.3 million, net unrealized losses of $1.8 million, and operating expenses of $1.0 million.

Off-Balance Sheet Arrangements and Contractual Obligations

In the normal course of its business, the Master Fund is party to financial instruments with off-balance sheet risk. The term “off-balance sheet risk” refers to an unrecorded potential liability that, even though it does not appear on the balance sheet, may result in a future obligation or loss. The financial instruments used by the Master Fund are currency futures, whose values are based upon an underlying asset and generally represent future commitments which have a reasonable possibility to be settled in cash or through physical delivery. The financial instruments are traded on an exchange and are standardized contracts.

The Fund and the Master Fund have not utilized, nor do they expect to utilize in the future, special purpose entities to facilitate off-balance sheet financing arrangements and have no loan guarantee arrangements or off-balance sheet arrangements of any kind, other than agreements entered into in the normal course of business noted above, which may include indemnification provisions related to certain risks service providers undertake in performing services which are in the best interests of the Fund and the Master Fund. While the Fund’s and the Master Fund’s exposure under such indemnification provisions cannot be estimated, these general business indemnifications are not expected to have a material impact on either the Fund’s or the Master Fund’s financial position.

The Fund and Master Fund’s contractual obligations are with the Managing Owner and the Commodity Broker. Management Fee payments made to the Managing Owner are calculated as a fixed percentage of the Master Fund’s net asset value. Commission payments to the Commodity Broker are on a contract-by-contract, or round-turn, basis. As such, the Managing Owner cannot anticipate the amount of payments that will be required under these arrangements for future periods as net asset values are not known until a future date. These agreements are effective for one-year terms, renewable automatically for additional one-year terms unless terminated. Additionally, these agreements may be terminated by either party for various reasons.

36

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

INTRODUCTION

The Fund is designed to replicate positions in a currency futures index. The market sensitive instruments held by it are subject to the risk of trading loss. Unlike an operating company, the risk of market sensitive instruments is integral, not incidental, to the Fund’s main line of business.

Market movements can produce frequent changes in the fair market value of the Fund’s open positions and, consequently, in its earnings and cash flow. The Fund’s market risk is primarily influenced by changes in the price of currencies.

Standard of Materiality

Materiality as used in this section, “Quantitative and Qualitative Disclosures About Market Risk,” is based on an assessment of reasonably possible market movements and the potential losses caused by such movements, taking into account the effects of margin, and any other multiplier features, as applicable, of the Fund’s market sensitive instruments.

QUANTIFYING THE FUND’S TRADING VALUE AT RISK

Quantitative Forward-Looking Statements

The following quantitative disclosures regarding the Fund’s market risk exposures contain “forward-looking statements” within the meaning of the safe harbor from civil liability provided for such statements by the Private Securities Litigation Reform Act of 1995 (set forth in Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934). All quantitative disclosures in this section are deemed to be forward-looking statements for purposes of the safe harbor, except for statements of historical fact (such as the dollar amount of maintenance margin required for market risk sensitive instruments held at the end of the reporting period).

Value at risk (VaR) is a statistical measure of the value of losses that would not be expected to be exceeded over a given time horizon and at a given probability level arising from movement of underlying risk factors. Loss is measured as a decline in the fair value of the portfolio as a result of changes in any of the material variables by which fair values are determined. VaR is measured over a specified holding period (1 day) and to a specified level of statistical confidence (99th percentile). However, the inherent uncertainty in the markets in which the Fund trades and the recurrence in the markets traded by the Fund of market movements far exceeding expectations could result in actual trading or non-trading losses far beyond the indicated VaR or the Fund’s experience to date (i.e., “risk of ruin”). In light of this, as well as the risks and uncertainties intrinsic to all future projections, the inclusion of the quantification included in this section should not be considered to constitute any assurance or representation that the Fund’s losses in any market sector will be limited to VaR or by the Fund’s attempts to manage its market risk.

THE FUND’S TRADING VALUE AT RISK

Commencing December 31, 2009 the Fund computed VaR using the actual historical market movements of the Fund’s total assets, as opposed to the previous methodology of using the historical market movements of the DX Contracts in connection with the Index only. Prior to December 31, 2009, the historical market movements of the underlying futures contracts were used because the actual historical market movements of the Fund were not sufficient.

The following table indicates the trading VaR associated with the Fund’s total assets as of September 30, 2010.

Description	Total Assets		Daily Volatility			VaR* (99  Percentile)		Number of times VaR Exceeded
PowerShares DB US Dollar Index Bearish Fund	$	172,861,541		0.55	%	$	2,133,054		4

* The VaR represents the one day downside risk, under normal market conditions, with a 99% confidence level. It is calculated using historical market moves of the Fund’s total assets and uses a one year look-back.

The following table indicates the trading VaR associated with the Fund’s total assets as of December 31, 2009.

Description	Total Assets		Daily Volatility			VaR* (99  Percentile)		Number of times VaR Exceeded
PowerShares DB US Dollar Index Bearish Fund	$	320,022,426		0.65	%	$	4,822,607		19

* The VaR represents the one day downside risk, under normal market conditions, with a 99% confidence level. It is calculated using historical market moves of the Fund’s total assets and uses a one year look-back.

37

NON-TRADING RISK

The Fund has non-trading market risk as a result of investing in short-term United States Treasury Obligations. The market risk represented by these investments is expected to be immaterial.

QUALITATIVE DISCLOSURES REGARDING PRIMARY TRADING RISK EXPOSURES

The following qualitative disclosures regarding the Fund’s market risk exposures — except for those disclosures that are statements of historical fact — constitute forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act. The Fund’s primary market risk exposures are subject to numerous uncertainties, contingencies and risks. Government interventions, defaults and expropriations, illiquid markets, the emergence of dominant fundamental factors, political upheavals, changes in historical price relationships, an influx of new market participants, increased regulation and many other factors could result in material losses as well as in material changes to the risk exposures of the Fund. There can be no assurance that the Fund’s current market exposure will not change materially. Investors may lose all or substantially all of their investment in the Fund.

Several factors may affect the price of the Index Currencies (which underlie the DX Contracts), including, but not limited to:

• National debt levels and trade deficits, including changes in balances of payments and trade;

• Domestic and foreign inflation rates and investors’ expectations concerning inflation rates;

• Domestic and foreign interest rates and investors’ expectations concerning interest rates;

• Currency exchange rates;

• Investment and trading activities of mutual funds, hedge funds and currency funds;

• Global or regional political, economic or financial events and situations;

• Supply and demand changes which influence the foreign exchange rates of various currencies;

• Monetary policies of governments (including exchange control programs, restrictions on local exchanges or markets and limitations on foreign investment in a country or on investment by residents of a country in other countries), trade restrictions, currency devaluations and revaluations;

• Governmental intervention in the currency market, directly and by regulation, in order to influence currency prices; and

• Expectations among market participants that a currency’s value soon will change.

QUALITATIVE DISCLOSURES REGARDING NON-TRADING RISK EXPOSURE

General

The Fund is unaware of any (i) anticipated known demands, commitments or capital expenditures; (ii) material trends, favorable or unfavorable, in its capital resources; or (iii) trends or uncertainties that will have a material effect on operations.

QUALITATIVE DISCLOSURES REGARDING MEANS OF MANAGING RISK EXPOSURE

Under ordinary circumstances, the Managing Owner’s discretionary power is limited to determining whether the Fund will make a distribution. Under emergency or extraordinary circumstances, the Managing Owner’s discretionary powers increase, but remain circumscribed. These special circumstances, for example, include the unavailability of the Index or certain natural or man-made disasters. The Managing Owner does not apply risk management techniques. The Fund initiates positions only on the “short” side of the market and does not employ “stop-loss” techniques.

ITEM 4. CONTROLS AND PROCEDURES.

For purposes of this Item 4, all references to the “Fund” shall be read to specifically include the Fund, the Master Fund, the Trust and the Master Trust. Please note that the disclosure controls and procedures and internal control over financial reporting of the Trust are the aggregate disclosure controls and procedures and internal control over financial reporting of the Fund and that of PowerShares DB US Dollar Index Bullish Fund, each a series of the Trust, and the disclosure controls and procedures and internal control over financial reporting of the Master Trust are the aggregate disclosure controls and procedures and internal control over financial reporting of the Master Fund and that of DB US Dollar Index Bullish Master Fund, each a series of the Master Trust.

38

Evaluation of Disclosure Controls and Procedures

Under the supervision and with the participation of the management of the Managing Owner, including Hans Ephraimson, its Chief Executive Officer, and Michael Gilligan, its Principal Financial Officer, the Fund carried out an evaluation of the effectiveness of the design and operation of its disclosure controls and procedures (as defined in Rule 13a-15(e) or 15d-15(e) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of the end of the period covered by this quarterly report, and, based upon that evaluation, Hans Ephraimson, the Chief Executive Officer of the Managing Owner, and Michael Gilligan, the Principal Financial Officer of the Managing Owner, concluded that the Fund’s disclosure controls and procedures were effective to ensure that information the Fund is required to disclose in the reports that it files or submits with the Securities and Exchange Commission (the “SEC”) under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms, and to ensure that information required to be disclosed by the Fund in the reports that it files or submits under the Exchange Act is accumulated and communicated to management of the Managing Owner, including its Chief Executive Officer and Principal Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There has been no change in internal control over financial reporting (as defined in the Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that occurred during the Fund’s last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the Fund’s internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings.

Not Applicable.

Item 1A. Risk Factors.

Other than the addition of the risk factor described below, there have been no material changes from the risk factors disclosed under the heading “Risk Factors” in Item 1A of the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2009. For risks that could affect actual results and cause results to differ materially from those expressed in any forward-looking statements made by, or on behalf of, the Registrant, see the risk factors disclosed under “Risk Factors” in Item 1A of the 2009 Annual Report on Form 10-K. The risk factor below should be read in conjunction with the risk factors disclosed in the 2009 Annual Report on Form 10-K.

The Effect Of Market Disruptions, Governmental Intervention And The Dodd-Frank Wall Street Reform And Consumer Protection Act Are Unpredictable And May Have An Adverse Effect On The Value Of Your Shares.

The global financial markets have in the past few years gone through pervasive and fundamental disruptions that have led to extensive and unprecedented governmental intervention. Such intervention has in certain cases been implemented on an “emergency” basis, suddenly and substantially eliminating market participants’ ability to continue to implement certain strategies or manage the risk of their outstanding positions. In addition — as one would expect given the complexities of the financial markets and the limited time frame within which governments have felt compelled to take action — these interventions have typically been unclear in scope and application, resulting in confusion and uncertainty which in itself has been materially detrimental to the efficient functioning of the markets as well as previously successful investment strategies.

The Fund may incur major losses in the event of disrupted markets and other extraordinary events in which historical pricing relationships become materially distorted. The risk of loss from pricing distortions is compounded by the fact that in disrupted markets many positions become illiquid, making it difficult or impossible to close out positions against which the markets are moving. The financing available to market participants from their banks, dealers and other counterparties is typically reduced in disrupted markets. Such a reduction may result in substantial losses to the affected market participants. Market disruptions may from time to time cause dramatic losses, and such events can result in otherwise historically low-risk strategies performing with unprecedented volatility and risk.

In response to the recent financial crises, the Obama Administration and the U.S. Congress proposed sweeping reform of the U.S. financial regulatory system. After over a year of debate, the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Reform Act, became law in July 2010. The Reform Act seeks to regulate markets, market participants and financial instruments that previously have been unregulated and substantially alters the regulation of many other markets, market participants and financial

39

instruments. Because many provisions of the Reform Act require rulemaking by the applicable regulators before becoming fully effective and the Reform Act mandates multiple agency reports and studies (which could result in additional legislative or regulatory action), it is difficult to predict the impact of the Reform Act on the Fund, the Managing Owner, and the markets in which the Fund may invest, the Net Asset Value of the Fund or the market price of the Shares. The Reform Act could result in the Fund’s investment strategy becoming non-viable or non-economic to implement. The Reform Act and regulations adopted pursuant to the Reform Act could have a material adverse impact on the profit potential of the Fund.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

(a) There have been no unregistered sales of the Fund’s securities. No Fund securities are authorized for issuance by the Fund under equity compensation plans.

(b) The Registrant’s Registration Statement on Form S-1 (Registration No. 333-136574-04) was declared effective on February 7, 2007 with information with respect to the use of proceeds from the sale of Shares being disclosed therein. A Post-Effective Amendment No. 1 to the Registration Statement on Form S-1 was declared effective on November 7, 2007, which also contained this information. The Registrant’s Registration Statement on Form S-1 (Registration No. 333-150588-03) was declared effective on May 6, 2008 with information with respect to the use of proceeds from the sale of Shares being disclosed therein. The Registrant’s Registration Statement on Form S-3 (Registration No. 333-162819-04) was declared effective on November 12, 2009 with information with respect to the use of proceeds from the sale of Shares being disclosed therein. The Registrant’s Registration Statement on Form S-3 (Registration No. 333-163552-04) was declared effective on January 4, 2010 with information with respect to the use of proceeds from the sale of Shares being disclosed therein and also acts as Post-Effective Amendment No. 1 to the Registration Statement on Form S-3 (Registration No. 333-162819-04), Post-Effective Amendment No. 2 to the Registration Statement on Form S-1 (Registration No. 333-150588-03) and Post-Effective Amendment No. 4 to the Registration Statement on Form S-1 (Registration No. 333-136574-04. The Shares commenced trading on the NYSE Alternext on February 20, 2007 and, as of November 25, 2008, are listed for trading on the NYSE Arca.

The proceeds from the sale of the Shares are used to purchase Master Fund Limited Units. The Master Fund uses the proceeds from the sale of the Master Fund Limited Units for general corporate purposes in accordance with its investment objectives and policies.

For the Three Months Ended September 30, 2010, 0.8 million Shares were created for $20.9 million and 1.0 million Shares were redeemed for $25.8 million. On September 30, 2010, 6.2 million Shares of the Fund were outstanding for a market capitalization of $167.8 million.

(c) The following table summarizes the redemptions by Authorized Participants during the Three Months Ended September 30, 2010 and 2009:

Period of Redemption	Total Number of Shares  Redeemed		Average Price Paid per  Share
Three Months Ended September 30, 2010		1,000,000	$	25.84
Three Months Ended September 30, 2009		1,400,000	$	27.74

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Reserved.

Item 5. Other Information.

None.

Item 6. Exhibits.

31.1 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

31.2 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

31.3 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

40

31.4 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

31.5 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

31.6 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

31.7 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

31.8 Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)

32.1 Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.2 Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.3 Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.4 Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.5 Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.6 Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.7 Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.8 Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

41

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

PowerShares DB US Dollar Index Trust on its own behalf and with respect to PowerShares DB US Dollar Index Bearish Fund
By:	DB Commodity Services LLC, its Managing Owner

By:	/S/    HANS EPHRAIMSON
Name:	Hans Ephraimson
Title:	Chief Executive Officer

By:	/S/    MICHAEL GILLIGAN
Name:	Michael Gilligan
Title:	Principal Financial Officer

DB US Dollar Index Master Trust on its own behalf and with respect to DB US Dollar Index Bearish Master Fund
By:	DB Commodity Services LLC, its Managing Owner

By:	/S/    HANS EPHRAIMSON
Name:	Hans Ephraimson
Title:	Chief Executive Officer

Dated: November 8, 2010	By:	/S/    MICHAEL GILLIGAN
	Name:	Michael Gilligan
	Title:	Principal Financial Officer

42

EXHIBIT INDEX

Exhibit Number	Description of Document	Page Number
31.1	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-2
31.2	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-3
31.3	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-4
31.4	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-5
31.5	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-6
31.6	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-7
31.7	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-8
31.8	Certification required under Exchange Act Rules 13a-14 and 15d-14 (filed herewith)		E-9
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-10
32.2	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-11
32.3	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-12
32.4	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-13
32.5	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-14
32.6	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-15
32.7	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-16
32.8	Certification of Principal Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)		E-17

E-1

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Hans Ephraimson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of PowerShares DB US Dollar Index Bearish Fund, a series of PowerShares DB US Dollar Index Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Hans Ephraimson
	Hans Ephraimson
	Chief Executive Officer

E-2

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Michael Gilligan, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of PowerShares DB US Dollar Index Bearish Fund, a series of PowerShares DB US Dollar Index Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Michael Gilligan
	Michael Gilligan
	Principal Financial Officer

E-3

EX-31.3

Exhibit 31.3

CERTIFICATION

I, Hans Ephraimson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of DB US Dollar Index Bearish Master Fund, a series of DB US Dollar Index Master Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Hans Ephraimson
	Hans Ephraimson
	Chief Executive Officer

E-4

EX-31.4

Exhibit 31.4

CERTIFICATION

I, Michael Gilligan, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of DB US Dollar Index Bearish Master Fund, a series of DB US Dollar Index Master Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Michael Gilligan
	Michael Gilligan
	Principal Financial Officer

E-5

EX-31.5

Exhibit 31.5

CERTIFICATION

I, Hans Ephraimson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of PowerShares DB US Dollar Index Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Hans Ephraimson
	Hans Ephraimson
	Chief Executive Officer

E-6

EX-31.6

Exhibit 31.6

CERTIFICATION

I, Michael Gilligan, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of PowerShares DB US Dollar Index Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Michael Gilligan
	Michael Gilligan
	Principal Financial Officer

E-7

EX-31.7

Exhibit 31.7

CERTIFICATION

I, Hans Ephraimson, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of DB US Dollar Index Master Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Hans Ephraimson
	Hans Ephraimson
	Chief Executive Officer

E-8

EX-31.8

Exhibit 31.8

CERTIFICATION

I, Michael Gilligan, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of DB US Dollar Index Master Trust;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: November 8, 2010	/s/ Michael Gilligan
	Michael Gilligan
	Principal Financial Officer

E-9

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Hans Ephraimson, Chief Executive Officer of DB Commodity Services LLC, the Managing Owner of PowerShares DB US Dollar Index Bearish Fund (the “Fund”), a series of PowerShares DB US Dollar Index Trust, hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Fund’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Fund.

	/s/ Hans Ephraimson
	Hans Ephraimson
Dated: November 8, 2010	Chief Executive Officer

E-10

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Michael Gilligan, Principal Financial Officer of DB Commodity Services LLC, the Managing Owner of PowerShares DB US Dollar Index Bearish Fund (the “Fund”), a series of PowerShares DB US Dollar Index Trust, hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Fund’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Fund.

	/s/ Michael Gilligan
	Michael Gilligan
Dated: November 8, 2010	Principal Financial Officer

E-11

EX-32.3

Exhibit 32.3

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Hans Ephraimson, Chief Executive Officer of DB Commodity Services LLC, the Managing Owner of DB US Dollar Index Bearish Master Fund (the “Master Fund”), a series of DB US Dollar Index Master Trust, hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Master Fund’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Master Fund.

	/s/ Hans Ephraimson
	Hans Ephraimson
Dated: November 8, 2010	Chief Executive Officer

E-12

EX-32.4

Exhibit 32.4

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Michael Gilligan, Principal Financial Officer of DB Commodity Services LLC, the Managing Owner of DB US Dollar Index Bearish Master Fund (the “Master Fund”), a series of DB US Dollar Index Master Trust, hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Master Fund’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Master Fund.

	/s/ Michael Gilligan
	Michael Gilligan
Dated: November 8, 2010	Principal Financial Officer

E-13

EX-32.5

Exhibit 32.5

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Hans Ephraimson, Chief Executive Officer of DB Commodity Services LLC, the Managing Owner of PowerShares DB US Dollar Index Trust (the “Trust”), hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Trust’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Trust.

	/s/ Hans Ephraimson
	Hans Ephraimson
Dated: November 8, 2010	Chief Executive Officer

E-14

EX-32.6

Exhibit 32.6

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Michael Gilligan, Principal Financial Officer of DB Commodity Services LLC, the Managing Owner of PowerShares DB US Dollar Index Trust (the “Trust”), hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Trust’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Trust.

	/s/ Michael Gilligan
	Michael Gilligan
Dated: November 8, 2010	Principal Financial Officer

E-15

EX-32.7

Exhibit 32.7

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Hans Ephraimson, Chief Executive Officer of DB Commodity Services LLC, the Managing Owner of DB US Dollar Index Master Trust (the “Master Trust”), hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Master Trust’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Master Trust.

	/s/ Hans Ephraimson
	Hans Ephraimson
Dated: November 8, 2010	Chief Executive Officer

E-16

EX-32.8

Exhibit 32.8

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Michael Gilligan, Principal Financial Officer of DB Commodity Services LLC, the Managing Owner of DB US Dollar Index Master Trust (the “Master Trust”), hereby certifies pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Master Trust’s Quarterly Report on Form 10-Q for the period ended September 30, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Quarterly Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Quarterly Report fairly presents, in all material respects, the financial condition and results of operations of the Master Trust.

	/s/ Michael Gilligan
	Michael Gilligan
Dated: November 8, 2010	Principal Financial Officer

E-17