United States Copper Index Fund (CPER) 10-Q5 Aug 152015 Q2 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2015	Aug. 03, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Entity Registrant Name	United States Commodity Index Funds Trust
Entity Central Index Key	1,479,247
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	USCI
Entity Common Stock, Shares Outstanding		12,350,000
United States Agriculture Index Fund [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		100,000
United States Commodity Index Fund [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		12,150,000
United States Copper Index Fund [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		100,000

Condensed Statements of Financi

Condensed Statements of Financial Condition - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 515,739,570	$ 718,659,173
Equity in trading accounts:
Cash and cash equivalents	53,160,567	81,100,456
Unrealized gain (loss) on open commodity futures contracts	(3,517,111)	(38,667,824)
Receivable for shares sold	2,320,238	0
Receivable from Sponsor (Note 4)	52,892	119,754
Interest receivable	1,307	1,343
Directors' fees and insurance receivable	42,395	0
ETF transaction fees receivable	350	1,050
Total assets	567,800,208	761,213,952
Liabilities and Capital
Payable for shares redeemed	0	43,736,649
Management fees payable (Note 4)	361,420	535,815
Professional fees payable	364,034	618,128
Brokerage commissions payable	42,815	42,815
Directors' fees and insurance payable	0	15,856
Total liabilities	$ 768,269	$ 44,949,263
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	$ 0	$ 0
Shareholders	567,031,939	716,264,689
Total Capital	567,031,939	716,264,689
Total liabilities and capital	$ 567,800,208	$ 761,213,952
Shares outstanding	12,150,000	15,050,000
United States Commodity Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 512,175,215	$ 711,984,950
Equity in trading accounts:
Cash and cash equivalents	52,684,412	80,222,326
Unrealized gain (loss) on open commodity futures contracts	(3,463,483)	(38,267,159)
Receivable for shares sold	2,320,238	0
Interest receivable	1,261	1,261
Directors' fees and insurance receivable	42,177	0
ETF transaction fees receivable	350	1,050
Total assets	563,760,170	753,942,428
Liabilities and Capital
Payable for shares redeemed	0	43,736,649
Management fees payable (Note 4)	359,341	531,781
Professional fees payable	326,879	494,705
Brokerage commissions payable	42,815	42,815
Directors' fees and insurance payable	0	15,638
Total liabilities	$ 729,035	$ 44,821,588
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	$ 0	$ 0
Shareholders	563,031,135	709,120,840
Total Capital	563,031,135	709,120,840
Total liabilities and capital	$ 563,760,170	$ 753,942,428
Shares outstanding	11,950,000	14,700,000
Net asset value per share	$ 47.12	$ 48.24
Market value per share	$ 47.17	$ 48.29
United States Copper Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 1,635,366	$ 2,729,373
Equity in trading accounts:
Cash and cash equivalents	331,183	337,148
Unrealized gain (loss) on open commodity futures contracts	(209,350)	(197,525)
Receivable from Sponsor (Note 4)	27,603	42,830
Interest receivable	0	25
Directors' fees and insurance receivable	175	0
Total assets	1,784,977	2,911,851
Liabilities and Capital
Management fees payable (Note 4)	959	1,612
Professional fees payable	19,883	44,577
Directors' fees and insurance payable	0	35
Total liabilities	$ 20,842	$ 46,224
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	$ 0	$ 0
Shareholders	1,764,135	2,865,627
Total Capital	1,764,135	2,865,627
Total liabilities and capital	$ 1,784,977	$ 2,911,851
Shares outstanding	100,000	150,000
Net asset value per share	$ 17.64	$ 19.10
Market value per share	$ 17.69	$ 19.02
United States Agriculture Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 1,928,989	$ 2,142,415
Equity in trading accounts:
Cash and cash equivalents	144,972	222,826
Unrealized gain (loss) on open commodity futures contracts	155,722	(66,576)
Receivable from Sponsor (Note 4)	25,289	39,139
Interest receivable	46	46
Directors' fees and insurance receivable	43	0
Total assets	2,255,061	2,337,850
Liabilities and Capital
Management fees payable (Note 4)	1,120	1,294
Professional fees payable	17,272	39,850
Directors' fees and insurance payable	0	104
Total liabilities	$ 18,392	$ 41,248
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	$ 0	$ 0
Shareholders	2,236,669	2,296,602
Total Capital	2,236,669	2,296,602
Total liabilities and capital	$ 2,255,061	$ 2,337,850
Shares outstanding	100,000	100,000
Net asset value per share	$ 22.37	$ 22.97
Market value per share	$ 20.77	$ 22.57

Condensed Schedule of Investmen

Condensed Schedule of Investments - Jun. 30, 2015		USD ($)Contract
United States Commodity Index Fund [Member]
Number of Contracts \| Contract	[1]	15,534
Unrealized Gain (Loss) on Open Commodity Contracts	[1]	$ (3,463,483)
% of Capital	[1]	(0.62%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member]
Number of Contracts \| Contract		5,041
Unrealized Gain (Loss) on Open Commodity Contracts		$ (18,134,198)
% of Capital		(3.22%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Zinc Futures LX July 2015 contracts, expiring July 2015 [Member]
Number of Contracts \| Contract		722
Unrealized Gain (Loss) on Open Commodity Contracts		$ (5,695,819)
% of Capital		(1.01%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Aluminum Futures LA September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		1,471
Unrealized Gain (Loss) on Open Commodity Contracts		$ (14,445,575)
% of Capital		(2.56%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cocoa Futures CC December 2015 contracts, expiring December 2015 [Member]
Number of Contracts \| Contract		1,208
Unrealized Gain (Loss) on Open Commodity Contracts		$ 6,475,640
% of Capital		1.15%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Lead Futures LL January 2016 contracts, expiring January 2016 [Member]
Number of Contracts \| Contract		872
Unrealized Gain (Loss) on Open Commodity Contracts		$ (4,040,019)
% of Capital		(0.72%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Zinc Futures LX February 2016 contracts, expiring February 2016 [Member]
Number of Contracts \| Contract		768
Unrealized Gain (Loss) on Open Commodity Contracts		$ (428,425)
% of Capital		(0.08%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member]
Number of Contracts \| Contract		9,214
Unrealized Gain (Loss) on Open Commodity Contracts		$ 11,938,610
% of Capital		2.12%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC August 2015 contracts, expiring August 2015 [Member]
Number of Contracts \| Contract		662
Unrealized Gain (Loss) on Open Commodity Contracts		$ (923,290)
% of Capital		(0.16%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Corn Futures C September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		1,680
Unrealized Gain (Loss) on Open Commodity Contracts		$ 2,541,763
% of Capital		0.45%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Futures S September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		803
Unrealized Gain (Loss) on Open Commodity Contracts		$ 1,711,288
% of Capital		0.30%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Wheat Futures W September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		1,462
Unrealized Gain (Loss) on Open Commodity Contracts		$ 9,022,975
% of Capital		1.60%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		362
Unrealized Gain (Loss) on Open Commodity Contracts		$ (608,725)
% of Capital		(0.11%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		601
Unrealized Gain (Loss) on Open Commodity Contracts		$ (2,141,138)
% of Capital		(0.38%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| NYMEX RBOB Gasoline Futures RB October 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		520
Unrealized Gain (Loss) on Open Commodity Contracts		$ 342,077
% of Capital		0.06%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Meal Futures SM October 2015 contracts, expiring October 2015 [Member]
Number of Contracts \| Contract		1,221
Unrealized Gain (Loss) on Open Commodity Contracts		$ 2,005,410
% of Capital		0.36%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH October 2015 contracts, expiring October 2015 [Member]
Number of Contracts \| Contract		1,568
Unrealized Gain (Loss) on Open Commodity Contracts		$ 1,204,520
% of Capital		0.21%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Gold Futures GC December 2015 contracts, expiring December 2015 [Member]
Number of Contracts \| Contract		335
Unrealized Gain (Loss) on Open Commodity Contracts		$ (1,216,270)
% of Capital		(0.21%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member]
Number of Contracts \| Contract	[2]	1,279
Unrealized Gain (Loss) on Open Commodity Contracts	[2]	$ 2,732,105
% of Capital	[2]	0.48%
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Zinc Futures LX July 2015 contracts, expiring July 2015 [Member]
Number of Contracts \| Contract	[2]	722
Unrealized Gain (Loss) on Open Commodity Contracts	[2]	$ 376,524
% of Capital	[2]	0.06%
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Aluminum Futures LA September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract	[2]	557
Unrealized Gain (Loss) on Open Commodity Contracts	[2]	$ 2,355,581
% of Capital	[2]	0.42%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member]
Market Value		$ 309,911,832
% of Capital		55.04%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.06%, 8/06/2015 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,998,125
% of Capital		5.33%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.09%, 9/03/2015 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,993,956
% of Capital		7.10%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.10%, 9/10/2015 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,992,506
% of Capital		7.10%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.15%, 9/17/2015 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,987,000
% of Capital		7.10%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/05/2015 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,992,062
% of Capital		5.33%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/19/2015 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,991,187
% of Capital		5.33%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.09%, 12/10/2015 [Member]
Principal Amount		$ 60,000,000
Market Value		$ 59,976,713
% of Capital		10.65%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.11%, 12/17/2015 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,980,283
% of Capital		7.10%
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract	[3]	27
Unrealized Gain (Loss) on Open Commodity Contracts	[3]	$ (209,350)
% of Capital	[3]	(11.87%)
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member]
Market Value		$ 749,713
% of Capital		42.50%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/19/2015 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,926
% of Capital		14.17%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.11%, 12/17/2015 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,877
% of Capital		14.16%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 12/10/2015 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,910
% of Capital		14.17%
United States Agriculture Index Fund [Member]
Number of Contracts \| Contract	[4]	79
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ 155,722
% of Capital	[4]	6.96%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member]
Number of Contracts \| Contract		37
Unrealized Gain (Loss) on Open Commodity Contracts		$ 55,605
% of Capital		2.48%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cocoa Futures CC December 2015 contracts, expiring December 2015 [Member]
Number of Contracts \| Contract		5
Unrealized Gain (Loss) on Open Commodity Contracts		$ 27,460
% of Capital		1.23%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Sugar 11 Futures SB October 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		13
Unrealized Gain (Loss) on Open Commodity Contracts		$ 2,464
% of Capital		0.11%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Canola Futures RS November 2015 contracts, expiring November 2015 [Member]
Number of Contracts \| Contract		13
Unrealized Gain (Loss) on Open Commodity Contracts		$ 15,645
% of Capital		0.70%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Coffee-C Futures KC December 2015 contracts, expiring December 2015 [Member]
Number of Contracts \| Contract		3
Unrealized Gain (Loss) on Open Commodity Contracts		$ 5,006
% of Capital		0.22%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cotton 2 Futures CT December 2015 contracts, expiring December 2015 [Member]
Number of Contracts \| Contract		3
Unrealized Gain (Loss) on Open Commodity Contracts		$ 5,030
% of Capital		0.22%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member]
Number of Contracts \| Contract		42
Unrealized Gain (Loss) on Open Commodity Contracts		$ 100,117
% of Capital		4.48%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC August 2015 contracts, expiring August 2015 [Member]
Number of Contracts \| Contract		4
Unrealized Gain (Loss) on Open Commodity Contracts		$ (5,980)
% of Capital		(0.27%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Wheat Futures W September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		5
Unrealized Gain (Loss) on Open Commodity Contracts		$ 31,200
% of Capital		1.40%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		1
Unrealized Gain (Loss) on Open Commodity Contracts		$ (350)
% of Capital		(0.02%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Meal Futures SM October 2015 contracts, expiring October 2015 [Member]
Number of Contracts \| Contract		5
Unrealized Gain (Loss) on Open Commodity Contracts		$ 17,520
% of Capital		0.78%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH August 2015 contracts, expiring August 2015 [Member]
Number of Contracts \| Contract		6
Unrealized Gain (Loss) on Open Commodity Contracts		$ 90
% of Capital	[5]	0.00%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| KCBT HRW Wheat Futures KW September 2015 contracts, expiring September 2015 [Member]
Number of Contracts \| Contract		2
Unrealized Gain (Loss) on Open Commodity Contracts		$ 9,638
% of Capital		0.43%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Futures S November 2015 contracts, expiring November 2015 [Member]
Number of Contracts \| Contract		7
Unrealized Gain (Loss) on Open Commodity Contracts		$ 37,287
% of Capital		1.67%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Corn Futures C December 2015 contracts, expiring December 2015 [Member]
Number of Contracts \| Contract		11
Unrealized Gain (Loss) on Open Commodity Contracts		$ 9,500
% of Capital		0.43%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Oil Futures BO October 2015 contracts, expiring October 2015 [Member]
Number of Contracts \| Contract		1
Unrealized Gain (Loss) on Open Commodity Contracts		$ 1,212
% of Capital		0.06%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member]
Market Value		$ 849,681
% of Capital		37.99%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/19/2015 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,927
% of Capital		11.18%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.11%, 12/17/2015 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,877
% of Capital		11.17%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 12/10/2015 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,910
% of Capital		11.17%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.15%, 9/17/2015 [Member]
Principal Amount		$ 100,000
Market Value		$ 99,967
% of Capital		4.47%

[1]	Collateral amounted to $52,684,412 on open futures contracts.
[2]	All short contracts are offset by the same number of Futures Contracts in the corresponding long positions and are acquired solely for the purpose of reducing a long position (e.g., due to a redemption or to reflect a rebalancing of the SDCI).
[3]	Collateral amounted to $331,183 on open futures contracts.
[4]	Collateral amounted to $144,972 on open futures contracts.
[5]	Represents less than 0.005%.

Condensed Schedule of Investme4

Condensed Schedule of Investments (Parenthetical) - Jun. 30, 2015 - USD ($)		Total
United States Commodity Index Fund [Member]
Debt Instrument, Collateral Amount		$ 52,684,412
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Zinc Futures LX July 2015 contracts, expiring July 2015 [Member]
Expiration date		July 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Aluminum Futures LA September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cocoa Futures CC December 2015 contracts, expiring December 2015 [Member]
Expiration date		December 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Lead Futures LL January 2016 contracts, expiring January 2016 [Member]
Expiration date		January 2,016
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Zinc Futures LX February 2016 contracts, expiring February 2016 [Member]
Expiration date		February 2,016
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC August 2015 contracts, expiring August 2015 [Member]
Expiration date		August 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Corn Futures C September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Futures S September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Wheat Futures W September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| NYMEX RBOB Gasoline Futures RB October 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Meal Futures SM October 2015 contracts, expiring October 2015 [Member]
Expiration date		October 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH October 2015 contracts, expiring October 2015 [Member]
Expiration date		October 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Gold Futures GC December 2015 contracts, expiring December 2015 [Member]
Expiration date		December 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Zinc Futures LX July 2015 contracts, expiring July 2015 [Member]
Expiration date	[1]	July 2,015
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Aluminum Futures LA September 2015 contracts, expiring September 2015 [Member]
Expiration date	[1]	September 2,015
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.06%, 8/06/2015 [Member]
Expiration date		8/6/2015
Interest rate		0.06%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.09%, 9/03/2015 [Member]
Expiration date		9/3/2015
Interest rate		0.09%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.10%, 9/10/2015 [Member]
Expiration date		9/10/2015
Interest rate		0.10%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.15%, 9/17/2015 [Member]
Expiration date		9/17/2015
Interest rate		0.15%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/05/2015 [Member]
Expiration date		11/5/2015
Interest rate		0.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/19/2015 [Member]
Expiration date		11/19/2015
Interest rate		0.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.09%, 12/10/2015 [Member]
Expiration date		12/10/2015
Interest rate		0.09%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.11%, 12/17/2015 [Member]
Expiration date		12/17/2015
Interest rate		0.11%
United States Copper Index Fund [Member]
Debt Instrument, Collateral Amount		$ 331,183
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG September 2015 contracts, expiring September 2015 [Member]
Expiration date	[2]	September 2,015
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/19/2015 [Member]
Expiration date		11/19/2015
Interest rate		0.08%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.11%, 12/17/2015 [Member]
Expiration date		12/17/2015
Interest rate		0.11%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 12/10/2015 [Member]
Expiration date		12/10/2015
Interest rate		0.08%
United States Agriculture Index Fund [Member]
Debt Instrument, Collateral Amount		$ 144,972
Interest rate		0.005%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cocoa Futures CC December 2015 contracts, expiring December 2015 [Member]
Expiration date		December 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Sugar 11 Futures SB October 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Canola Futures RS November 2015 contracts, expiring November 2015 [Member]
Expiration date		November 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Coffee-C Futures KC December 2015 contracts, expiring December 2015 [Member]
Expiration date		December 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cotton 2 Futures CT December 2015 contracts, expiring December 2015 [Member]
Expiration date		December 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC August 2015 contracts, expiring August 2015 [Member]
Expiration date		August 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Wheat Futures W September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Meal Futures SM October 2015 contracts, expiring October 2015 [Member]
Expiration date		October 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH August 2015 contracts, expiring August 2015 [Member]
Expiration date		August 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| KCBT HRW Wheat Futures KW September 2015 contracts, expiring September 2015 [Member]
Expiration date		September 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Futures S November 2015 contracts, expiring November 2015 [Member]
Expiration date		November 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Corn Futures C December 2015 contracts, expiring December 2015 [Member]
Expiration date		December 2,015
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Oil Futures BO October 2015 contracts, expiring October 2015 1 [Member]
Expiration date		October 2,015
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 11/19/2015 [Member]
Expiration date		11/19/2015
Interest rate		0.08%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.11%, 12/17/2015 [Member]
Expiration date		12/17/2015
Interest rate		0.11%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.08%, 12/10/2015 [Member]
Expiration date		12/10/2015
Interest rate		0.08%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.15%, 9/17/2015 [Member]
Expiration date		9/17/2015
Interest rate		0.15%

[1]	All short contracts are offset by the same number of Futures Contracts in the corresponding long positions and are acquired solely for the purpose of reducing a long position (e.g., due to a redemption or to reflect a rebalancing of the SDCI).
[2]	Collateral amounted to $331,183 on open futures contracts.

Condensed Statements of Operati

Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
Condensed Statements of Operations - USD ($)	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ (5,316,894)	$ 18,933,549	$ (54,990,026)	$ 45,938,946
Change in unrealized gain (loss) on open positions	31,829,367	976,882	35,150,713	(519,102)
Realized gain (loss) on foreign currency transactions	6	(13)	59	(131)
Realized gain (loss) on short-term investments	0	0	3,812	0
Change in unrealized gain (loss) on foreign currency translations	36	10	4	7
Interest income	85,477	74,973	167,335	146,497
ETF transaction fees	4,550	8,050	9,450	11,550
Total income (loss)	26,602,542	19,993,451	(19,658,653)	45,577,767
Expenses
Management fees (Note 4)	1,078,777	1,317,836	2,398,737	2,590,141
Professional fees	311,875	143,890	603,647	298,150
Brokerage commissions	151,919	111,326	352,329	213,535
Directors' fees and insurance	28,626	36,547	56,510	67,677
Registration fees	0	850	0	850
Total expenses	1,571,197	1,610,449	3,411,223	3,170,353
Expense waiver (Note 4)	(32,171)	(23,031)	(61,779)	(46,393)
Net expenses	1,539,026	1,587,418	3,349,444	3,123,960
Net income (loss)	25,063,516	18,406,033	(23,008,097)	42,453,807
United States Commodity Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	(5,385,302)	18,838,461	(54,343,959)	45,709,634
Change in unrealized gain (loss) on open positions	31,831,009	761,683	34,803,676	(720,941)
Realized gain (loss) on foreign currency transactions	0	(8)	0	(4)
Realized gain (loss) on short-term investments	0	0	3,645	0
Change in unrealized gain (loss) on foreign currency translations	0	2	0	(1)
Interest income	84,905	73,991	165,976	144,645
ETF transaction fees	4,550	7,700	8,750	10,850
Total income (loss)	26,535,162	19,681,829	(19,361,912)	45,144,183
Expenses
Management fees (Note 4)	1,072,363	1,303,334	2,383,627	2,563,353
Professional fees	279,169	117,682	540,705	246,022
Brokerage commissions	151,217	110,353	350,400	211,599
Directors' fees and insurance	28,429	36,039	56,042	66,756
Registration fees	0	850	0	850
Total expenses	1,531,178	1,568,258	3,330,774	3,088,580
Net income (loss)	$ 25,003,984	$ 18,113,571	$ (22,692,686)	$ 42,055,603
Net income (loss) per share	$ 2.18	$ 1.84	$ (1.12)	$ 4.38
Net income (loss) per weighted average share	$ 2.15	$ 1.76	$ (1.75)	$ 4.27
Weighted average shares outstanding	11,620,879	10,276,374	12,948,619	9,850,276
United States Copper Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ 173,162	$ (9,675)	$ (189,213)	$ (4,012)
Change in unrealized gain (loss) on open positions	(259,063)	262,712	(11,825)	36,812
Realized gain (loss) on short-term investments	0	0	17	0
Interest income	252	414	553	720
ETF transaction fees	0	350	350	700
Total income (loss)	(85,649)	253,801	(200,118)	34,220
Expenses
Management fees (Note 4)	3,021	6,187	6,124	9,879
Professional fees	17,077	15,288	28,262	30,408
Brokerage commissions	296	473	556	841
Directors' fees and insurance	103	202	202	338
Total expenses	20,497	22,150	35,144	41,466
Expense waiver (Note 4)	(16,779)	(13,891)	(27,603)	(28,159)
Net expenses	3,718	8,259	7,541	13,307
Net income (loss)	$ (89,367)	$ 245,542	$ (207,659)	$ 20,913
Net income (loss) per share	$ (0.90)	$ 1.23	$ (1.46)	$ (1.26)
Net income (loss) per weighted average share	$ (0.89)	$ 1.34	$ (2)	$ 0.14
Weighted average shares outstanding	100,000	182,967	103,867	145,304
United States Agricultural Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ (104,754)	$ 93,360	$ (274,438)	$ 253,494
Change in unrealized gain (loss) on open positions	257,421	(192,224)	222,298	(2,201)
Realized gain (loss) on foreign currency transactions	6	(5)	59	(127)
Change in unrealized gain (loss) on foreign currency translations	36	8	4	8
Interest income	320	316	648	624
Total income (loss)	153,029	(98,545)	(51,429)	251,798
Expenses
Management fees (Note 4)	3,393	4,572	6,891	9,353
Professional fees	15,629	5,460	25,637	10,860
Brokerage commissions	406	301	1,064	702
Directors' fees and insurance	94	159	195	300
Total expenses	19,522	10,492	33,787	21,215
Expense waiver (Note 4)	(15,392)	(4,502)	(25,283)	(9,013)
Net expenses	4,130	5,990	8,504	12,202
Net income (loss)	$ 148,899	$ (104,535)	$ (59,933)	$ 239,596
Net income (loss) per share	$ 1.49	$ (1.04)	$ (0.60)	$ 2.40
Net income (loss) per weighted average share	$ 1.49	$ (1.05)	$ (0.60)	$ 2.40
Weighted average shares outstanding	100,000	100,000	100,000	100,000

Condensed Statement of Changes

Condensed Statement of Changes in Capital - USD ($)	3 Months Ended	6 Months Ended
Condensed Statement of Changes in Capital - USD ($)	Jun. 30, 2015	Jun. 30, 2015
Balances		$ 716,264,689
Net income (loss)	$ 25,063,516	(23,008,097)
Balances	567,031,939	567,031,939
United States Commodity Index Fund [Member]
Balances		709,120,840
Additions		88,200,393
Redemptions		(211,597,412)
Net income (loss)	25,003,984	(22,692,686)
Balances	$ 563,031,135	$ 563,031,135
Shares Outstanding		14,700,000
Additions		1,900,000
Redemptions		(4,650,000)
Shares Outstanding	11,950,000	11,950,000
Net Asset Value Per Share:
Net asset value, beginning of period		$ 48.24
Net asset value, end of period	$ 47.12	$ 47.12
United States Copper Index Fund [Member]
Balances		$ 2,865,627
Additions		0
Redemptions		(893,833)
Net income (loss)	$ (89,367)	(207,659)
Balances	$ 1,764,135	$ 1,764,135
Shares Outstanding		150,000
Additions		0
Redemptions		(50,000)
Shares Outstanding	100,000	100,000
Net Asset Value Per Share:
Net asset value, beginning of period		$ 19.10
Net asset value, end of period	$ 17.64	$ 17.64
United States Agriculture Index Fund [Member]
Balances		$ 2,296,602
Additions		0
Redemptions		0
Net income (loss)	$ 148,899	(59,933)
Balances	$ 2,236,669	$ 2,236,669
Shares Outstanding		100,000
Additions		0
Redemptions		0
Shares Outstanding	100,000	100,000
Net Asset Value Per Share:
Net asset value, beginning of period		$ 22.97
Net asset value, end of period	$ 22.37	$ 22.37
United States Commodity Index Funds Trust [Member]
Balances		$ 716,264,689
Additions		88,200,393
Redemptions		(214,425,046)
Net income (loss)		(23,008,097)
Balances	$ 567,031,939	$ 567,031,939
Shares Outstanding		15,050,000
Additions		1,900,000
Redemptions		(4,800,000)
Shares Outstanding	12,150,000	12,150,000
Sponsor [Member] \| United States Commodity Index Fund [Member]
Balances		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances	$ 0	$ 0
Shares Outstanding		0
Additions		0
Redemptions		0
Shares Outstanding	0	0
Sponsor [Member] \| United States Copper Index Fund [Member]
Balances		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances	$ 0	$ 0
Shares Outstanding		0
Additions		0
Redemptions		0
Shares Outstanding	0	0
Sponsor [Member] \| United States Agriculture Index Fund [Member]
Balances		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances	$ 0	$ 0
Shares Outstanding		0
Additions		0
Redemptions		0
Shares Outstanding	0	0
Sponsor [Member] \| United States Commodity Index Funds Trust [Member]
Balances		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances	$ 0	$ 0
Shares Outstanding		0
Additions		0
Redemptions		0
Shares Outstanding	0	0
Shareholders [Member] \| United States Commodity Index Fund [Member]
Balances		$ 709,120,840
Additions		88,200,393
Redemptions		(211,597,412)
Net income (loss)		(22,692,686)
Balances	$ 563,031,135	$ 563,031,135
Shares Outstanding		14,700,000
Additions		1,900,000
Redemptions		(4,650,000)
Shares Outstanding	11,950,000	11,950,000
Shareholders [Member] \| United States Copper Index Fund [Member]
Balances		$ 2,865,627
Additions		0
Redemptions		(893,833)
Net income (loss)		(207,659)
Balances	$ 1,764,135	$ 1,764,135
Shares Outstanding		150,000
Additions		0
Redemptions		(50,000)
Shares Outstanding	100,000	100,000
Shareholders [Member] \| United States Agriculture Index Fund [Member]
Balances		$ 2,296,602
Additions		0
Redemptions		0
Net income (loss)		(59,933)
Balances	$ 2,236,669	$ 2,236,669
Shares Outstanding		100,000
Additions		0
Redemptions		0
Shares Outstanding	100,000	100,000
Shareholders [Member] \| United States Commodity Index Funds Trust [Member]
Balances		$ 716,264,689
Additions		88,200,393
Redemptions		(214,425,046)
Net income (loss)		(23,008,097)
Balances	$ 567,031,939	$ 567,031,939
Shares Outstanding		15,050,000
Additions		1,900,000
Redemptions		(4,800,000)
Shares Outstanding	12,150,000	12,150,000

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows - USD ($)	6 Months Ended
Condensed Statements of Cash Flows - USD ($)	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities:
Net income (loss)	$ (23,008,097)	$ 42,453,807
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	27,939,889	(23,666,165)
Unrealized (gain) loss on open futures contracts	(35,150,713)	519,102
(Increase) decrease in receivable from Sponsor	66,862	199,334
(Increase) decrease in interest receivable	36	0
(Increase) decrease in directors' fees and insurance receivable	(42,395)	(11,158)
(Increase) decrease in ETF transaction fees receivable	700	(350)
Increase (decrease) in management fees payable	(174,395)	13,611
Increase (decrease) in professional fees payable	(254,094)	(378,452)
Increase (decrease) in directors' fees and insurance payable	(15,856)	(8,303)
Increase (decrease) in registration fees payable	0	(152)
Net cash provided by (used in) operating activities	(30,638,063)	19,121,274
Cash Flows from Financing Activities:
Addition of shares	85,880,155	129,228,798
Redemption of shares	(258,161,695)	(30,040,946)
Net cash provided by (used in) financing activities	(172,281,540)	99,187,852
Net Increase (Decrease) in Cash and Cash Equivalents	(202,919,603)	118,309,126
Cash and Cash Equivalents, beginning of year	718,659,173	480,181,509
Cash and Cash Equivalents, end of year	515,739,570	598,490,635
United States Commodity Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(22,692,686)	42,055,603
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	27,537,914	(23,505,179)
Unrealized (gain) loss on open futures contracts	(34,803,676)	720,941
(Increase) decrease in directors' fees and insurance receivable	(42,177)	(11,006)
(Increase) decrease in ETF transaction fees receivable	700	(350)
Increase (decrease) in management fees payable	(172,440)	12,885
Increase (decrease) in professional fees payable	(167,826)	(174,370)
Increase (decrease) in directors' fees and insurance payable	(15,638)	(8,199)
Increase (decrease) in registration fees payable	0	(152)
Net cash provided by (used in) operating activities	(30,355,829)	19,090,173
Cash Flows from Financing Activities:
Addition of shares	85,880,155	127,209,127
Redemption of shares	(255,334,061)	(30,040,946)
Net cash provided by (used in) financing activities	(169,453,906)	97,168,181
Net Increase (Decrease) in Cash and Cash Equivalents	(199,809,735)	116,258,354
Cash and Cash Equivalents, beginning of year	711,984,950	474,123,523
Cash and Cash Equivalents, end of year	512,175,215	590,381,877
United States Copper Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(207,659)	20,913
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	5,965	(229,179)
Unrealized (gain) loss on open futures contracts	11,825	(36,812)
(Increase) decrease in receivable from Sponsor	15,227	53,630
(Increase) decrease in interest receivable	25	0
(Increase) decrease in directors' fees and insurance receivable	(175)	(23)
Increase (decrease) in management fees payable	(653)	1,007
Increase (decrease) in professional fees payable	(24,694)	(54,820)
Increase (decrease) in directors' fees and insurance payable	(35)	(16)
Net cash provided by (used in) operating activities	(200,174)	(245,300)
Cash Flows from Financing Activities:
Addition of shares	0	2,019,671
Redemption of shares	(893,833)	0
Net cash provided by (used in) financing activities	(893,833)	2,019,671
Net Increase (Decrease) in Cash and Cash Equivalents	(1,094,007)	1,774,371
Cash and Cash Equivalents, beginning of year	2,729,373	2,040,735
Cash and Cash Equivalents, end of year	1,635,366	3,815,106
United States Agricultural Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(59,933)	239,596
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	77,854	(5,591)
Unrealized (gain) loss on open futures contracts	(222,298)	2,201
(Increase) decrease in receivable from Sponsor	13,850	72,759
(Increase) decrease in directors' fees and insurance receivable	(43)	(41)
Increase (decrease) in management fees payable	(174)	(195)
Increase (decrease) in professional fees payable	(22,578)	(74,490)
Increase (decrease) in directors' fees and insurance payable	(104)	(52)
Net cash provided by (used in) operating activities	(213,426)	234,187
Cash Flows from Financing Activities:
Addition of shares	0	0
Redemption of shares	0	0
Net cash provided by (used in) financing activities	0	0
Net Increase (Decrease) in Cash and Cash Equivalents	(213,426)	234,187
Cash and Cash Equivalents, beginning of year	2,142,415	2,098,545
Cash and Cash Equivalents, end of year	$ 1,928,989	$ 2,332,732

Organization And Business

Organization And Business	6 Months Ended
Organization And Business	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Business	NOTE 1 - ORGANIZATION AND BUSINESS The United States Commodity Index Funds Trust (the “Trust”) was organized as a Delaware statutory trust on December 21, 2009. The Trust is a series trust formed pursuant to the Delaware Statutory Trust Act and includes the United States Commodity Index Fund (“USCI”), a commodity pool formed on April 1, 2010 and first made available to the public on August 10, 2010, the United States Copper Index Fund (“CPER”), a commodity pool formed on November 26, 2010 and first made available to the public on November 15, 2011, and the United States Agriculture Index Fund (“USAG”), a commodity pool formed on November 26, 2010 and first made available to the public on April 13, 2012. On January 30, 2015, USCF as the sponsor of the Trust and its series the United States Metals Index Fund (“USMI”) announced that its officers and members had authorized a plan to (i) liquidate USMI, (ii) terminate the continuous offering of USMI, and (iii) deregister USMI under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and therefore, terminate the Trust’s obligation to include USMI on its periodic and current reports with the U.S. Securities and Exchange Commission (“SEC”). Shares of USMI ceased trading on the NYSE Arca, Inc. (“NYSE Arca”) and USMI was closed to purchases and redemptions as of the close of regular trading on the NYSE Arca on March 18, 2015 (the “Closing Date”). On March 18, 2015, the SEC declared effective a post-effective amendment to the registration statement for USMI to remove from registration all of the securities that remained unsold as of March 18, 2015 (the termination of the offering). USCF, on behalf of the Trust and USMI, terminated USMI effective March 18, 2015. On March 24, 2015, USMI liquidated all its assets and distributed cash pro rata to all remaining shareholders as of such date. On March 31, 2015, the NYSE Arca filed a Form 25 removing the listing of USMI on the NYSE Arca. USCI, CPER and USAG each issue shares (“shares”) that may be purchased and sold on the NYSE Arca. USCI, CPER, and USAG are collectively referred to herein as the “Trust Series.” The Trust and each Trust Series operate pursuant to the Third Amended and Restated Declaration of Trust and Trust Agreement dated as of March 22, 2013 (the “Trust Agreement”). United States Commodity Funds LLC (“USCF”) is the sponsor of the Trust and the Trust Series and is also responsible for the management of the Trust and the Trust Series. For purposes of the financial statement presentation, unless specified otherwise, all references will be to the Trust Series. USCF has the power and authority to establish and designate one or more series and to issue shares thereof, from time to time as it deems necessary or desirable. USCF has exclusive power to fix and determine the relative rights and preferences as between the shares of any series as to right of redemption, special and relative rights as to dividends and other distributions and on liquidation, conversion rights, and conditions under which the series shall have separate voting rights or no voting rights. The term for which the Trust is to exist commenced on the date of the filing of the Certificate of Trust, and the Trust and any Trust Series will exist in perpetuity, unless earlier terminated in accordance with the provisions of the Trust Agreement. Separate and distinct records must be maintained for each Trust Series and the assets associated with a Trust Series must be held in such separate and distinct records (directly or indirectly, including a nominee or otherwise) and accounted for in such separate and distinct records separately from the assets of any other Trust Series. Each Trust Series is separate from all other Trust Series created as series of the Trust in respect of the assets and liabilities allocated to that Trust Series and represents a separate investment portfolio of the Trust. The sole Trustee of the Trust is Wilmington Trust Company (the “Trustee”), a Delaware banking corporation. The Trustee is unaffiliated with USCF. The Trustee’s duties and liabilities with respect to the offering of shares and the management of the Trust are limited to its express obligations under the Trust Agreement. USCF is a member of the National Futures Association (the “NFA”) and became a commodity pool operator (“CPO”) registered with the Commodity Futures Trading Commission (the “CFTC”) effective December 1, 2005 and a swaps firm on August 8, 2013. The Trust and each Trust Series have a fiscal year ending on December 31. USCF is also the general partner of the United States Oil Fund, LP (“USO”), the United States Natural Gas Fund, LP (“UNG”), the United States 12 Month Oil Fund, LP (“USL”), the United States Gasoline Fund, LP (“UGA”) and the United States Diesel-Heating Oil Fund, LP (“UHN”), which listed their limited partnership shares on the American Stock Exchange (the “AMEX”) under the ticker symbols “USO” on April 10, 2006, “UNG” on April 18, 2007, “USL” on December 6, 2007, “UGA” on February 26, 2008 and “UHN” on April 9, 2008, respectively. As a result of the acquisition of the AMEX by NYSE Euronext, each of USO’s, UNG’s, USL’s, UGA’s and UHN’s shares commenced trading on the NYSE Arca on November 25, 2008. USCF is also the general partner of the United States Short Oil Fund, LP (“DNO”), the United States 12 Month Natural Gas Fund, LP (“UNL”) and the United States Brent Oil Fund, LP (“BNO”), which listed their limited partnership shares on the NYSE Arca under the ticker symbols “DNO” on September 24, 2009, “UNL” on November 18, 2009 and “BNO” on June 2, 2010, respectively. All funds listed previously are referred to collectively herein as the “Related Public Funds.” Effective as of May 1, 2012, each of USCI, CPER and USAG issue shares to certain authorized purchasers (“Authorized Participants”) by offering baskets consisting of 50,000 100,000 From July 1, 2011 through December 31, 2014 (and continuing at least through April 30, 2016), Authorized Participants pay USCI $ 350 50,000 1,000 350 1,000 The accompanying unaudited condensed financial statements have been prepared in accordance with Rule 10-01 of Regulation S-X promulgated by the U.S. Securities and Exchange Commission (the “SEC”) and, therefore, do not include all information and footnote disclosure required under generally accepted accounting principles (“GAAP”) in the United States of America. The financial information included herein is unaudited; however, such financial information reflects all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of USCF, necessary for the fair presentation of the condensed financial statements for the interim period.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	6 Months Ended
Summary Of Significant Accounting Policies	Jun. 30, 2015
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The financial statements have been prepared in conformity with GAAP as detailed in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification. Each Trust Series is an investment company and follows the accounting and reporting guidance in FASB Topic 946. The Trust financial statements included its respective series of funds financial statements including USCI, CPER, USAG and USMI through March 31, 2015. For reporting commencing with the June 30, 2015 reporting period, and in conjunction with the termination of USMI on March 18, 2015 the USMI financial statements have not been included, but are included in the overall Trust financial statements for the applicable reporting periods. Commodity futures contracts, forward contracts, physical commodities, and related options are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized gains or losses on open contracts are reflected in the condensed statements of financial condition and represent the difference between the original contract amount and the market value (as determined by exchange settlement prices for futures contracts and related options and cash dealer prices at a predetermined time for forward contracts, physical commodities, and their related options) as of the last business day of the year or as of the last date of the condensed financial statements. Changes in the unrealized gains or losses between periods are reflected in the condensed statements of operations. Each Trust Series earns income on funds held at the custodian or FCM at prevailing market rates earned on such investments. Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis. The Trust Series are not subject to federal income taxes; each investor reports his/her allocable share of income, gain, loss deductions or credits on his/her own income tax return. In accordance with accounting principles generally accepted in the United States of America (“GAAP”), each Trust Series is required to determine whether a tax position is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any tax related appeals or litigation processes, based on the technical merits of the position. Each Trust Series files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. None of the Trust Series is subject to income tax return examinations by major taxing authorities for years before 2011. The tax benefit recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. De-recognition of a tax benefit previously recognized results in each Trust Series recording a tax liability that reduces net assets. However, each Trust Series’ conclusions regarding this policy may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analysis of and changes to tax laws, regulations and interpretations thereof. Each Trust Series recognizes interest accrued related to unrecognized tax benefits and penalties related to unrecognized tax benefits in income tax fees payable, if assessed. No interest expense or penalties have been recognized as of and for the period ended June 30, 2015 for any Trust Series. Profit or loss shall be allocated among the shareholders of each Trust Series in proportion to the number of shares each investor holds as of the close of each month. USCF may revise, alter or otherwise modify this method of allocation as described in the Trust Agreement. Effective as of May 1, 2012, Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets for USCI, CPER and USAG only in blocks of 50,000 Each Trust Series receives or pays the proceeds from shares sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Participants are reflected in each Trust Series’ condensed statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. Authorized Participants pay each Trust Series a fee of $ 350 Each Trust Series’ per share NAV is calculated on each NYSE Arca trading day by taking the current market value of its total assets, subtracting any liabilities and dividing the amount by the total number of shares issued and outstanding. Each Trust Series uses the closing prices on the relevant Futures Exchanges (as defined in Note 3 below) of the Applicable Benchmark Component Futures Contracts (as defined in Note 3 below) that at any given time make up the Applicable Index (as defined in Note 3 below) (determined at the earlier of the close of such exchange or 2:30 p.m. New York time) for the contracts traded on the Futures Exchanges, but calculates or determines the value of all other investments of each Trust Series using market quotations, if available, or other information customarily used to determine the fair value of such investments. Net income (loss) per share is the difference between the per share NAV at the beginning of each period and the per share NAV at the end of each period. The weighted average number of shares outstanding was computed for purposes of disclosing net income (loss) per weighted average share. The weighted average shares are equal to the number of shares outstanding at the end of the period, adjusted proportionately for shares added and redeemed based on the amount of time the shares were outstanding during such period. As of June 30, 2015, USCF held 5 40 5 Offering costs incurred in connection with the registration of shares prior to the commencement of the offering are borne by USCF. Offering costs incurred in connection with the registration of additional shares after the commencement of the offering are borne by each Trust Series. These costs include registration fees paid to regulatory agencies and all legal, accounting, printing and other expenses associated with such offerings. Costs borne by the Trust Series after the commencement of an offering are accounted for as a deferred charge and thereafter amortized to expense over twelve months on a straight-line basis or a shorter period if warranted. Cash equivalents include money market funds and overnight deposits or time deposits with original maturity dates of six months or less. Certain prior year amounts have been reclassified to conform to the current year presentation. The preparation of condensed financial statements in conformity with GAAP requires USCF to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

Trust Series

Trust Series	6 Months Ended
Trust Series	Jun. 30, 2015
Trust Series [Abstract]
Trust Series	NOTE 3 - TRUST SERIES In connection with the execution of the First Trust Agreement on April 1, 2010, USCI was designated as the first series of the Trust. USCF contributed $ 1,000 1,000 20 On July 30, 2010, USCI received a notice of effectiveness from the SEC for its registration of 50,000,000 50.00 100,000 5,000,000 100,000 1,000 20 In connection with the Second Amended and Restated Trust Agreement dated November 10, 2010, USMI, USAG and CPER were designated as three additional series of the Trust. Following the designation of the additional series, an initial capital contribution of $ 3,000 1,000 CPER and USAG received notice of effectiveness from the SEC for its registration of 30,000,000 20,000,000 25 100,000 2,500,000 1,000 On April 13, 2012, USAG listed its shares on the NYSE Arca under the ticker symbol “USAG.” USAG established its initial per share NAV by setting the price at $ 25 1,000 USCI’s Investment Objective USCI invests in futures contracts for commodities that are currently traded on the New York Mercantile Exchange (the “NYMEX”), ICE Futures (“ICE Futures”), Chicago Board of Trade (“CBOT”), Chicago Mercantile Exchange (“CME”), London Metal Exchange (“LME”), Commodity Exchange, Inc. (“COMEX”) or on other foreign exchanges (the NYMEX, ICE Futures, CBOT, CME, LME, COMEX and other foreign exchanges, collectively, the “Futures Exchanges”) (such futures contracts, collectively, “Futures Contracts”) and, to a lesser extent, in order to comply with regulatory requirements or in view of market conditions, other commodity-based contracts and instruments such as cash-settled options on Futures Contracts, forward contracts relating to commodities, cleared swap contracts and other non-exchange traded over-the-counter (“OTC”) transactions that are based on the price of commodities and Futures Contracts (collectively, “Other Commodity-Related Investments”). Market conditions that USCF currently anticipates could cause USCI to invest in Other Commodity Related Investments would be those allowing USCI to obtain greater liquidity or to execute transactions with more favorable pricing. Futures Contracts and Other Commodity-Related Investments collectively are referred to as “Commodity Interests.” The investment objective of USCI is for the daily changes in percentage terms of its shares’ per share net asset value (“NAV”) to reflect the daily changes in percentage terms of the SummerHaven Dynamic Commodity Index Total Return SM USCI’s shares began trading on August 10, 2010. As of June 30, 2015, USCI held 520 1,208 5,166 2,592 5,112 936 15,534 CPER’s Investment Objective The investment objective of CPER is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the SummerHaven Copper Index Total Return SM CPER seeks to achieve its investment objective by investing to the fullest extent possible in the Benchmark Component Copper Futures Contracts. Then, if constrained by regulatory requirements or in view of market conditions, CPER will invest next in other Eligible Copper Futures Contracts, and finally to a lesser extent, in other exchange traded futures contracts that are economically identical or substantially similar to the Benchmark Component Copper Futures Contracts if one or more other Eligible Copper Futures Contracts is not available. When CPER has invested to the fullest extent possible in exchange-traded futures contracts, CPER may then invest in other contracts and instruments based on the Benchmark Component Copper Futures Contracts, other Eligible Copper Futures Contracts or copper, such as cash-settled options, forward contracts, cleared swap contracts and swap contracts other than cleared swap contracts. Other exchange-traded futures contracts that are economically identical or substantially similar to the Benchmark Component Copper Futures Contracts and other contracts and instruments based on the Benchmark Component Copper Futures Contracts, are collectively referred to as “Other Copper-Related Investments,” and together with Benchmark Component Copper Futures Contracts and other Eligible Copper Futures Contracts, “Copper Interests.” CPER’s shares began trading on November 15, 2011. As of June 30, 2015, CPER held 27 Futures Contracts on the COMEX. USAG’s Investment Objective The investment objective of USAG is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the SummerHaven Dynamic Agriculture Index Total Return SM USAG seeks to achieve its investment objective by investing to the fullest extent possible in the Benchmark Component Agriculture Futures Contracts. Then, if constrained by regulatory requirements or in view of market conditions, USAG will invest next in other Eligible Agriculture Futures Contracts based on the same agricultural commodity as the futures contracts subject to such regulatory constraints or market conditions, and finally, to a lesser extent, in other exchange traded futures contracts that are economically identical or substantially similar to the Benchmark Component Agriculture Futures Contracts if one or more other Eligible Agriculture Futures Contracts is not available. When USAG has invested to the fullest extent possible in exchange-traded futures contracts, USAG may then invest in other contracts and instruments based on the Benchmark Component Agriculture Futures Contracts, other Eligible Agriculture Futures Contracts or the agricultural commodities included in the SDAI, such as cash-settled options, forward contracts, cleared swap contracts and swap contracts other than cleared swap contracts. Other exchange-traded futures contracts that are economically identical or substantially similar to the Benchmark Component Agriculture Futures Contracts and other contracts and instruments based on the Benchmark Component Agriculture Futures Contracts, as well as metals included in the SDAI, are collectively referred to as “Other Agriculture-Related Investments,” and together with Benchmark Component Agriculture Futures Contracts and other Eligible Agriculture Futures Contracts, “Agriculture Interests.” USAG’s shares began trading on April 13, 2012. As of June 30, 2015, USAG held 37 11 2 29 79 Other Defined Terms Trust Series The SDCI, the SCI and the SDAI are referred to throughout these Notes to Financial Statements collectively as the “Applicable Index” or “Indices.” Benchmark Component Futures Contracts, Benchmark Component Copper Futures Contracts, Benchmark Component Agriculture Futures Contracts and Benchmark Component Metals Futures Contracts are referred to throughout these Notes to Condensed Financial Statements collectively as “Applicable Benchmark Component Futures Contracts.” Other Commodity-Related Investments, Other Copper-Related Investments, Other Agriculture-Related Interests and Other Metals-Related Investments are referred to throughout these Notes to Condensed Financial Statements collectively as “Other Related Investments.” Trading Advisor and Trustee The Trust Series’ trading advisor is SummerHaven Investment Management, LLC (“SummerHaven”), a Delaware limited liability company that is registered as a commodity trading advisor and CPO with the CFTC and is a member of the NFA. SummerHaven provides advisory services to USCF with respect to the Applicable Index of each Trust Series and the investment decisions of each Trust Series. The Trustee accepts service of legal process on the Trust in the State of Delaware and makes certain filings under the Delaware Statutory Trust Act. The Trustee does not owe any other duties to the Trust, USCF or the shareholders.

Fees Paid By Each Trust Series

Fees Paid By Each Trust Series And Related Party Transactions	6 Months Ended
	Jun. 30, 2015
Fees Paid By Usci and Cper and Related Party Transactions [Abstract]
Fees Paid By Each Trust Series And Related Party Transactions	NOTE 4 - FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS USCF Management Fee Under the Trust Agreement, USCF is responsible for investing the assets of each Trust Series in accordance with the objectives and policies of each such Trust Series. In addition, USCF has arranged for one or more third parties to provide trading advisory, administrative, custody, accounting, transfer agency and other necessary services to each Trust Series. For these services, each of USCI, CPER and USAG is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.95 0.80 0.65 0.95 0.65 0.80 Trustee Fee The Trustee is the Delaware trustee of the Trust. In connection with the Trustee’s services, USCF is responsible for paying the Trustee’s annual fee in the amount of $ 3,000 Ongoing Registration Fees and Other Offering Expenses Each Trust Series pays the costs and expenses associated with the ongoing registration of its shares subsequent to the initial offering. These costs include registration or other fees paid to regulatory agencies in connection with the offer and sale of shares, and all legal, accounting, printing and other expenses associated with such offer and sale. During the six months ended June 30, 2015 no Trust Series incurred any registration fees or other offering expenses. During the six months ended June 30, 2014 USCI incurred $ 850 Directors’ Fees and Expenses Each Trust Series is responsible for paying its portion of the directors’ fees and directors’ and officers’ liability insurance for such Trust Series and the Related Public Funds. In addition, each Trust Series is responsible for paying the fees and expenses of the independent directors who also serve as audit committee members of the Trust Series and the Related Public Funds. Each Trust Series shares the fees and expenses on a pro rata basis with each other Trust Series and each Related Public Fund, as described above, based on the relative assets of each fund computed on a daily basis. These fees and expenses for the year ended December 31, 2015, are estimated to be a total of $ 120,600 119,800 400 400 Investor Tax Reporting Cost The fees and expenses associated with each Trust Series’ audit expenses and tax accounting and reporting requirements are paid by such Trust Series. These costs are estimated to be $ 690,000 46,000 41,000 Other Expenses and Fees and Expense Waivers In addition to the fees described above, each Trust Series pays all brokerage fees and other expenses in connection with the operation of such Trust Series, excluding costs and expenses paid by USCF as outlined in Note 5 Contracts and Agreements 0.15 27,603 25,283 Note 5 Contracts and Agreements

Contracts And Agreements

Contracts And Agreements	6 Months Ended
Contracts And Agreements	Jun. 30, 2015
Contractors [Abstract]
Contracts And Agreements	NOTE 5 CONTRACTS AND AGREEMENTS USCF and the Trust, each on its own behalf and on behalf of each Trust Series, are party to a marketing agent agreement, dated as of July 22, 2010, as amended from time to time, with the Marketing Agent, whereby the Marketing Agent provides certain marketing services for each Trust Series as outlined in the agreement. The fee of the Marketing Agent, which is borne by USCF, is equal to 0.06 3 0.04 3 10 The above fee does not include website construction and development; which are borne by USCF. USCF and the Trust, on its own behalf and on behalf of each Trust Series, are also party to a custodian agreement, dated July 22, 2010, as amended from time to time, with Brown Brothers Harriman & Co. (“BBH&Co.”), whereby BBH&Co. holds investments on behalf of each Trust Series. USCF pays the fees of the custodian, which are determined by the parties from time to time. In addition, USCF and the Trust, on its own behalf and on behalf of each Trust Series, are party to an administrative agency agreement, dated July 22, 2010, as amended from time to time, with BBH&Co., whereby BBH&Co. acts as the administrative agent, transfer agent and registrar for each Trust Series. USCF also pays the fees of BBH&Co. for its services under such agreement and such fees are determined by the parties from time to time. Currently, USCF pays BBH&Co. for its services, in the foregoing capacities, a minimum amount of $ 75,000 20,000 0.06 500 0.0465 500 1 0.035 1 7 15 The Trust on behalf of each Trust Series entered into a brokerage agreement, dated March 1, 2010 for USCI and November 18, 2011 for each of CPER and USAG, as amended from time to time, with Newedge USA, LLC (“Newedge”). On July 7, 2014, the Trust on behalf of each Trust Series entered into a Futures and Cleared Swaps Agreement with Wells Fargo Securities, LLC (“WFS”). WFS and Newedge are collectively referred to as the “FCM”. The agreements require the FCM to provide services to each Trust Series in connection with the purchase and sale of Futures Contracts and Other Related Investments that may be purchased and sold by or through the FCM for each Trust Series’ account. In accordance with the agreement, the FCM charges each Trust Series commissions of approximately $ 7 15 For the six months ended For the six months ended Total commissions accrued to brokers $ 350,400 $ 211,599 Total commissions as an annualized percentage of average total net assets 0.12 % 0.07 % Commissions accrued as a result of rebalancing $ 325,949 $ 201,058 Percentage of commissions accrued as a result of rebalancing 93.02 % 95.02 % Commissions accrued as a result of creation and redemption activity $ 24,451 $ 10,541 Percentage of commissions accrued as a result of creation and redemption activity 6.98 % 4.98 % The increase in USCI’s total commissions accrued to brokers for the six months ended June 30, 2015, compared to the six months ended June 30, 2014, was primarily due to an increase in USCI’s creation and redemption activity over the applicable periods along with the number of contracts traded during the rebalancing periods. CPER For the six months ended For the six months ended Total commissions accrued to brokers $ 556 $ 841 Total commissions as an annualized percentage of average total net assets 0.06 % 0.06 % Commissions accrued as a result of rebalancing $ 486 $ 647 Percentage of commissions accrued as a result of rebalancing 87.37 % 76.90 % Commissions accrued as a result of creation and redemption activity $ 70 $ 194 Percentage of commissions accrued as a result of creation and redemption activity 12.63 % 23.10 % CPER’s total commissions accrued to brokers for the six months ended June 30, 2015, compared to the six months ended June 30, 2014, decreased slightly due to the number contracts traded during the rebalancing periods. USAG For the six months ended For the six months ended Total commissions accrued to brokers $ 1,064 $ 702 Total commissions as an annualized percentage of average total net assets 0.10 % 0.06 % Commissions accrued as a result of rebalancing $ 1,064 $ 702 Percentage of commissions accrued as a result of rebalancing 100 % 100 % Commissions accrued as a result of creation and redemption activity $ $ Percentage of commissions accrued as a result of creation and redemption activity % % USAG’s total commissions accrued to brokers for the six months ended June 30, 2015, compared to the six months ended June 30, 2014, increased slightly due to the contracts traded during the rebalancing periods. USCF is party to an Amended Advisory Agreement, dated July 1, 2011, as amended from time to time, with SummerHaven, whereby SummerHaven provides advisory services to USCF with respect to the Applicable Index for each Trust Series and investment decisions for each Trust Series. SummerHaven’s advisory services include, but are not limited to, general consultation regarding the calculation and maintenance of the Applicable Index for each Trust Series, anticipated changes to each Applicable Index and the nature of each Applicable Index’s current or anticipated component securities. For these services, USCF pays SummerHaven a fee based on a percentage of the average total net assets of each Trust Series. For USCI, the fee is equal to the percentage fees paid to USCF minus 0.14%, with that result multiplied by 0.5, minus 0.06% to arrive at the actual fee paid. For each of CPER and USAG, the fee is equal to the percentage fees paid to USCF minus 0.18%, with that result multiplied by 0.5, minus 0.06% to arrive at the actual fee paid. USCF is also party to an Amended Licensing Agreement, dated July 1, 2011, as amended from time to time, with SummerHaven, whereby SummerHaven sub-licensed to each Trust Series the use of certain names and marks, including the Applicable Index for each Trust Series for which SummerHaven has a sub-license from SHIM, the owner of each Applicable Index. Under the Licensing Agreement, USCF paid SummerHaven an annual fee of $ 15,000 annual fee of 0.06% of the average daily total net assets of each Trust Series.

Financial Instruments, Off-Bala

Financial Instruments, Off-Balance Sheet Risks and Contingencies	6 Months Ended
	Jun. 30, 2015
Risks and Uncertainties [Abstract]
Financial Instruments, Off-Balance Sheet Risks and Contingencies	NOTE 6 FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES Each Trust Series engages in the trading of futures contracts and may engage in trading options on futures contracts and cleared swaps (collectively, “derivatives”). As such, each Trust Series is exposed to both market risk, which is the risk arising from changes in the market value of the contracts, and credit risk, which is the risk of failure by another party to perform according to the terms of a contract. Each Trust Series may enter into futures contracts and options on futures contracts to gain exposure to changes in the value of an underlying commodity. A futures contract obligates the seller to deliver (and the purchaser to accept) the future delivery of a specified quantity and type of a commodity at a specified time and place. Some futures contracts may call for physical delivery of the asset, while others are settled in cash. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity or by making an offsetting sale or purchase of an identical futures contract on the same or linked exchange before the designated date of delivery. The purchase and sale of futures contracts and options on futures contracts require margin deposits with a FCM. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act requires a FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. Futures contracts, options on futures contracts and cleared swaps involve, to varying degrees, elements of market risk (specifically commodity price risk) and exposure to loss in excess of the amount of variation margin. The face or contract amounts reflect the extent of the total exposure each Trust Series has in the particular classes of instruments. Additional risks associated with the use of futures contracts are an imperfect correlation between movements in the price of the futures contracts and the market value of the underlying securities and the possibility of an illiquid market for a futures contract. Buying and selling options on futures contracts exposes investors to the risks of purchasing or selling futures contracts. All of the Futures Contracts held by each Trust Series were exchange-traded through June 30, 2015. The risks associated with exchange-traded contracts are generally perceived to be less than those associated with OTC transactions since, in OTC transactions, a party must rely solely on the credit of its respective individual counterparties. When each Trust Series enters into non-exchange traded contracts (including Exchange for Risk or EFR transactions), it is subject to the credit risk associated with counterparty non-performance. The credit risk from counterparty non-performance associated with such instruments is the net unrealized gain, if any, on the transaction. Currently, each Trust Series has credit risk under its futures contracts since the sole counterparty to all domestic and foreign futures contracts is the clearinghouse for the exchange on which the relevant contracts are traded. In addition, each Trust Series bears the risk of financial failure by the clearing broker. A Trust Series’ cash and other property, such as Treasuries, deposited with a FCM are considered commingled with all other customer funds, subject to the FCM’s segregation requirements. In the event of a FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The insolvency of a FCM could result in the complete loss of a Trust Series’ assets posted with that FCM; however, the majority of each Trust Series’ assets are held in Treasuries, cash and/or cash equivalents with the Trust Series’ custodian and would not be impacted by the insolvency of a FCM. The failure or insolvency of the Trust Series’ custodian, however, could result in a substantial loss of each Trust Series’ assets. USCF may invest a portion of each Trust Series’ cash in money market funds that seek to maintain a stable per share NAV. Each Trust Series may be exposed to any risk of loss associated with an investment in such money market funds. As of June 30, 2015 and December 31, 2014, none of the Trust Series held investments in money market funds. Each Trust Series holds cash deposits with its custodian. Pursuant to a written agreement with BBH&Co., uninvested overnight cash balances are swept to offshore branches of U.S. regulated and domiciled banks located in Toronto, Canada; London, United Kingdom; Grand Cayman, Cayman Islands; and Nassau, Bahamas; which are subject to U.S. regulation and regulatory oversight. As of June 30, 2015 and December 31, 2014, USCI held cash deposits and investments in Treasuries in the amounts of $ 564,859,627 792,207,276 1,966,549 3,066,521 2,073,961 2,365,241 For derivatives, risks arise from changes in the market value of the contracts. Theoretically, each Trust Series is exposed to market risk equal to the value of Futures Contracts purchased and unlimited liability on such contracts sold short. As both a buyer and a seller of options, each Trust Series pays or receives a premium at the outset and then bears the risk of unfavorable changes in the price of the contract underlying the option. The Trust Series’ policy is to continuously monitor its exposure to market and counterparty risk through the use of a variety of financial, position and credit exposure reporting controls and procedures. In addition, the Trust Series or USCF have a policy of requiring review of the credit standing of each counterparty with which they conduct business. The financial instruments held by the applicable Trust Series are reported in its condensed statements of financial condition at market or fair value, or at carrying amounts that approximate fair value, because of their highly liquid nature and short-term maturity.

Financial Highlights

Financial Highlights	6 Months Ended
Financial Highlights	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Highlights	NOTE 7 FINANCIAL HIGHLIGHTS USCI For the Six Months Ended For the Six Months Ended June 30, 2015 June 30, 2014 (Unaudited) (Unaudited) Per Share Operating Performance: Net asset value, beginning of period $ 48.24 $ 56.06 Total income (loss) (0.86) 4.69 Net expenses (0.26) (0.31) Net increase (decrease) in net asset value (1.12) 4.38 Net asset value, end of period $ 47.12 $ 60.44 Total Return (2.32) % 7.81 % Ratios to Average Net Assets Total income (loss) (3.22) % 7.81 % Management fees* 0.80 % 0.89 % Total expenses excluding management fees* 0.32 % 0.18 % Expenses waived* % % Net expenses excluding management fees* 0.32 % 0.18 % Net income (loss) (3.78) % 7.28 % * Annualized. ** Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.80% per annum of average daily total net assets for USCI. CPER For the Six Months Ended For the Six Months Ended June 30, 2015 June 30, 2014 (Unaudited) (Unaudited) Per Share Operating Performance: Net asset value, beginning of period $ 19.10 $ 22.92 Total income (loss) (1.39) (1.17) Net expenses (0.07) (0.09) Net increase (decrease) in net asset value (1.46) (1.26) Net asset value, end of period $ 17.64 $ 21.66 Total Return (7.64) % (5.50) % Ratios to Average Net Assets Total income (loss) (10.53) % 1.12 % Management fees* 0.65 % 0.65 %‸ Total expenses excluding management fees* 3.08 % 2.08 % Expenses waived* (2.93) % (1.85) %‸ Net expenses excluding management fees* 0.15 % 0.23 % Net income (loss) (10.93) % 0.68 % * Annualized ** Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.65% per annum of average daily total net assets for CPER. ‸ Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to waive the management fee paid by CPER from 0.95% to 0.80% per annum of average daily total net assets. USCF has voluntarily agreed to pay certain expenses typically borne by CPER to the extent that such expenses exceeded 0.15% (15 basis points) of CPER’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods. USAG For the Six Months Ended For the Six Months Ended June 30, 2015 June 30, 2014 (Unaudited) (Unaudited) Per Share Operating Performance: Net asset value, beginning of period $ 22.97 $ 22.79 Total income (loss) (0.51) 2.52 Net expenses (0.09) (0.12) Net increase (decrease) in net asset value (0.60) 2.40 Net asset value, end of period $ 22.37 $ 25.19 Total Return (2.61) % 10.53 % Ratios to Average Net Assets Total income (loss) (2.41) % 9.98 % Management fees* 0.65 % 0.75 %‸ Total expenses excluding management fees* 2.54 % 0.95 % Expenses waived* (2.39) % (0.72) %‸ Net expenses excluding management fees* 0.15 % 0.23 % Net income (loss) (2.80) % 9.50 % * Annualized ** Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.65% per annum of average daily total net assets for USAG. ‸ Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to waive the management fee paid by USAG from 0.95% to 0.80% per annum of average daily total net assets. USCF has voluntarily agreed to pay certain expenses typically borne by USAG to the extent that such expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods. Total returns are calculated based on the change in value during the period. An individual shareholder’s total return and ratio may vary from the above total returns and ratios based on the timing of contributions to and withdrawals from each Trust Series.

Fair Value Of Financial Instrum

Fair Value Of Financial Instruments	6 Months Ended
Fair Value Of Financial Instruments	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Of Financial Instruments	NOTE 8 FAIR VALUE OF FINANCIAL INSTRUMENTS The Trust and each Trust Series value their investments in accordance with Accounting Standards Codification 820 Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurement. The changes to past practice resulting from the application of ASC 820 relate to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurement. ASC 820 establishes a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Trust and each Trust Series (observable inputs) and (2) the Trust’s and each Trust Series’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the ASC 820 hierarchy are as follows: Level I Quoted prices (unadjusted) in active markets for identical Level II Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar Level III Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. In some instances, the inputs used to measure fair value might fall within different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest input level that is significant to the fair value measurement in its entirety. The following table summarizes the valuation of USCI’s securities at June 30, 2015 using the fair value hierarchy: At June 30, 2015 Total Level I Level II Level III Short-Term Investments $ 309,911,832 $ 309,911,832 $ $ Exchange-Traded Futures Contracts Foreign Contracts (15,402,093) (15,402,093) United States Contracts 11,938,610 11,938,610 During the six months ended June 30, 2015, there were no transfers between Level I and Level II. The following table summarizes the valuation of USCI’s securities at December 31, 2014 using the fair value hierarchy: At December 31, 2014 Total Level I Level II Level III Short-Term Investments $ 509,916,252 $ 509,916,252 $ $ Exchange-Traded Futures Contracts Foreign Contracts (27,137,120) (27,137,120) United States Contracts (11,130,039) (11,130,039) During year ended December 31, 2014, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at June 30, 2015 using the fair value hierarchy: At June 30, 2015 Total Level I Level II Level III Short-Term Investments $ 749,713 $ 749,713 $ $ Exchange-Traded Futures Contracts United States Contracts (209,350) (209,350) During the six months ended June 30, 2015, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at December 31, 2014 using the fair value hierarchy: At December 31, 2014 Total Level I Level II Level III Short-Term Investments $ 1,699,497 $ 1,699,497 $ $ Exchange-Traded Futures Contracts United States Contracts (197,525) (197,525) During the year ended December 31, 2014, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at June 30, 2015 using the fair value hierarchy: At June 30, 2015 Total Level I Level II Level III Short-Term Investments $ 849,681 $ 849,681 $ $ Exchange-Traded Futures Contracts Foreign Contracts 55,605 55,605 United States Contracts 100,117 100,117 During the six months ended June 30, 2015, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at December 31, 2014 using the fair value hierarchy: At December 31, 2014 Total Level I Level II Level III Short-Term Investments $ 1,599,523 $ 1,599,523 $ $ Exchange-Traded Futures Contracts Foreign Contracts (76,062) (76,062) United States Contracts 9,486 9,486 During the year ended December 31, 2014, there were no transfers between Level I and Level II. The Trust and each Trust Series have adopted the provisions of Accounting Standards Codification 815 Derivatives and Hedging, which require presentation of qualitative disclosures about objectives and strategies for using derivatives, quantitative disclosures about fair value amounts and gains and losses on derivatives. Condensed Derivatives not Accounted for Statements of Financial Fair Value Fair Value as Hedging Instruments Condition Location At June 30, 2015 At December 31, 2014 Futures - Commodity Contracts Assets $ (3,463,483) $ (38,267,159) Fair Value of Derivative Instruments Held by CPER Condensed Derivatives not Accounted for Statements of Financial Fair Value Fair Value as Hedging Instruments Condition Location At June 30, 2015 At December 31, 2014 Futures - Commodity Contracts Assets $ (209,350) $ (197,525) Fair Value of Derivative Instruments Held by USAG Condensed Derivatives not Accounted for Statements of Financial Fair Value Fair Value as Hedging Instruments Condition Location At June 30, 2015 At December 31, 2014 Futures - Commodity Contracts Assets $ 155,722 $ (66,576) For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (54,343,959) $ 45,709,634 Change in unrealized gain (loss) on open contracts $ 34,803,676 $ (720,941) The Effect of Derivative Instruments on the Condensed Statements of Operations of CPER For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (189,213) $ (4,012) Change in unrealized gain (loss) on open contracts $ (11,825) $ 36,812 34 The Effect of Derivative Instruments on the Condensed Statements of Operations of USAG For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (274,438) $ 253,494 Change in unrealized gain (loss) on open contracts $ 222,298 $ (2,201)

Subsequent Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	NOTE 9 SUBSEQUENT EVENTS The Trust and each Trust Series thereunder have performed an evaluation of subsequent events through the date the condensed financial statements were issued. This evaluation did not result in any subsequent events that necessitated disclosures and/or adjustments.

Summary Of Significant Accoun17

Summary Of Significant Accounting Policies (Policies)	6 Months Ended
Summary Of Significant Accounting Policies (Policies)	Jun. 30, 2015
Basis of Presentation	The financial statements have been prepared in conformity with GAAP as detailed in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification. Each Trust Series is an investment company and follows the accounting and reporting guidance in FASB Topic 946. The Trust financial statements included its respective series of funds financial statements including USCI, CPER, USAG and USMI through March 31, 2015. For reporting commencing with the June 30, 2015 reporting period, and in conjunction with the termination of USMI on March 18, 2015 the USMI financial statements have not been included, but are included in the overall Trust financial statements for the applicable reporting periods.
Revenue Recognition	Revenue Recognition Commodity futures contracts, forward contracts, physical commodities, and related options are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized gains or losses on open contracts are reflected in the condensed statements of financial condition and represent the difference between the original contract amount and the market value (as determined by exchange settlement prices for futures contracts and related options and cash dealer prices at a predetermined time for forward contracts, physical commodities, and their related options) as of the last business day of the year or as of the last date of the condensed financial statements. Changes in the unrealized gains or losses between periods are reflected in the condensed statements of operations. Each Trust Series earns income on funds held at the custodian or FCM at prevailing market rates earned on such investments.
Brokerage Commissions	Brokerage Commissions Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis.
Income Taxes	Income Taxes The Trust Series are not subject to federal income taxes; each investor reports his/her allocable share of income, gain, loss deductions or credits on his/her own income tax return. In accordance with accounting principles generally accepted in the United States of America (“GAAP”), each Trust Series is required to determine whether a tax position is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any tax related appeals or litigation processes, based on the technical merits of the position. Each Trust Series files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. None of the Trust Series is subject to income tax return examinations by major taxing authorities for years before 2011. The tax benefit recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. De-recognition of a tax benefit previously recognized results in each Trust Series recording a tax liability that reduces net assets. However, each Trust Series’ conclusions regarding this policy may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analysis of and changes to tax laws, regulations and interpretations thereof. Each Trust Series recognizes interest accrued related to unrecognized tax benefits and penalties related to unrecognized tax benefits in income tax fees payable, if assessed. No interest expense or penalties have been recognized as of and for the period ended June 30, 2015 for any Trust Series.
Trust Capital and Allocation of Income and Losses	Trust Capital and Allocation of Income and Losses Profit or loss shall be allocated among the shareholders of each Trust Series in proportion to the number of shares each investor holds as of the close of each month. USCF may revise, alter or otherwise modify this method of allocation as described in the Trust Agreement.
Creations and Redemptions	Creations and Redemptions Effective as of May 1, 2012, Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets for USCI, CPER and USAG only in blocks of 50,000 Each Trust Series receives or pays the proceeds from shares sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Participants are reflected in each Trust Series’ condensed statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. Authorized Participants pay each Trust Series a fee of $ 350
Calculation of Net Asset Value (“NAV”)	Calculation of Net Asset Value (“NAV”) Each Trust Series’ per share NAV is calculated on each NYSE Arca trading day by taking the current market value of its total assets, subtracting any liabilities and dividing the amount by the total number of shares issued and outstanding. Each Trust Series uses the closing prices on the relevant Futures Exchanges (as defined in Note 3 below) of the Applicable Benchmark Component Futures Contracts (as defined in Note 3 below) that at any given time make up the Applicable Index (as defined in Note 3 below) (determined at the earlier of the close of such exchange or 2:30 p.m. New York time) for the contracts traded on the Futures Exchanges, but calculates or determines the value of all other investments of each Trust Series using market quotations, if available, or other information customarily used to determine the fair value of such investments.
Net Income (Loss) Per Share	Net Income (Loss) Per Share Net income (loss) per share is the difference between the per share NAV at the beginning of each period and the per share NAV at the end of each period. The weighted average number of shares outstanding was computed for purposes of disclosing net income (loss) per weighted average share. The weighted average shares are equal to the number of shares outstanding at the end of the period, adjusted proportionately for shares added and redeemed based on the amount of time the shares were outstanding during such period. As of June 30, 2015, USCF held 5 40 5
Offering Costs	Offering Costs Offering costs incurred in connection with the registration of shares prior to the commencement of the offering are borne by USCF. Offering costs incurred in connection with the registration of additional shares after the commencement of the offering are borne by each Trust Series. These costs include registration fees paid to regulatory agencies and all legal, accounting, printing and other expenses associated with such offerings. Costs borne by the Trust Series after the commencement of an offering are accounted for as a deferred charge and thereafter amortized to expense over twelve months on a straight-line basis or a shorter period if warranted.
Cash Equivalents	Cash Equivalents Cash equivalents include money market funds and overnight deposits or time deposits with original maturity dates of six months or less.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.
Use of Estimates	Use of Estimates The preparation of condensed financial statements in conformity with GAAP requires USCF to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

Contracts And Agreements (Table

Contracts And Agreements (Tables)	6 Months Ended
Contracts And Agreements (Tables)	Jun. 30, 2015
Contractors [Abstract]
Brokerage Commissions	USCI For the six months ended For the six months ended Total commissions accrued to brokers $ 350,400 $ 211,599 Total commissions as an annualized percentage of average total net assets 0.12 % 0.07 % Commissions accrued as a result of rebalancing $ 325,949 $ 201,058 Percentage of commissions accrued as a result of rebalancing 93.02 % 95.02 % Commissions accrued as a result of creation and redemption activity $ 24,451 $ 10,541 Percentage of commissions accrued as a result of creation and redemption activity 6.98 % 4.98 % The increase in USCI’s total commissions accrued to brokers for the six months ended June 30, 2015, compared to the six months ended June 30, 2014, was primarily due to an increase in USCI’s creation and redemption activity over the applicable periods along with the number of contracts traded during the rebalancing periods. CPER For the six months ended For the six months ended Total commissions accrued to brokers $ 556 $ 841 Total commissions as an annualized percentage of average total net assets 0.06 % 0.06 % Commissions accrued as a result of rebalancing $ 486 $ 647 Percentage of commissions accrued as a result of rebalancing 87.37 % 76.90 % Commissions accrued as a result of creation and redemption activity $ 70 $ 194 Percentage of commissions accrued as a result of creation and redemption activity 12.63 % 23.10 % CPER’s total commissions accrued to brokers for the six months ended June 30, 2015, compared to the six months ended June 30, 2014, decreased slightly due to the number contracts traded during the rebalancing periods. USAG For the six months ended For the six months ended Total commissions accrued to brokers $ 1,064 $ 702 Total commissions as an annualized percentage of average total net assets 0.10 % 0.06 % Commissions accrued as a result of rebalancing $ 1,064 $ 702 Percentage of commissions accrued as a result of rebalancing 100 % 100 % Commissions accrued as a result of creation and redemption activity $ $ Percentage of commissions accrued as a result of creation and redemption activity % %

Financial Highlights (Tables)

Financial Highlights (Tables)	6 Months Ended
Financial Highlights (Tables)	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Per Unit Performance Data and Other Supplemental Financial Data for Usci, Cper, Usag and Usmi	The following tables present per share performance data and other supplemental financial data for each Trust Series for the six months ended June 30, 2015 and 2014 for the shareholders. This information has been derived from information presented in the condensed financial statements. USCI For the Six Months Ended For the Six Months Ended June 30, 2015 June 30, 2014 (Unaudited) (Unaudited) Per Share Operating Performance: Net asset value, beginning of period $ 48.24 $ 56.06 Total income (loss) (0.86) 4.69 Net expenses (0.26) (0.31) Net increase (decrease) in net asset value (1.12) 4.38 Net asset value, end of period $ 47.12 $ 60.44 Total Return (2.32) % 7.81 % Ratios to Average Net Assets Total income (loss) (3.22) % 7.81 % Management fees* 0.80 % 0.89 % Total expenses excluding management fees* 0.32 % 0.18 % Expenses waived* % % Net expenses excluding management fees* 0.32 % 0.18 % Net income (loss) (3.78) % 7.28 % * Annualized. ** Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.80% per annum of average daily total net assets for USCI. CPER For the Six Months Ended For the Six Months Ended June 30, 2015 June 30, 2014 (Unaudited) (Unaudited) Per Share Operating Performance: Net asset value, beginning of period $ 19.10 $ 22.92 Total income (loss) (1.39) (1.17) Net expenses (0.07) (0.09) Net increase (decrease) in net asset value (1.46) (1.26) Net asset value, end of period $ 17.64 $ 21.66 Total Return (7.64) % (5.50) % Ratios to Average Net Assets Total income (loss) (10.53) % 1.12 % Management fees* 0.65 % 0.65 %‸ Total expenses excluding management fees* 3.08 % 2.08 % Expenses waived* (2.93) % (1.85) %‸ Net expenses excluding management fees* 0.15 % 0.23 % Net income (loss) (10.93) % 0.68 % * Annualized ** Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.65% per annum of average daily total net assets for CPER. ‸ Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to waive the management fee paid by CPER from 0.95% to 0.80% per annum of average daily total net assets. USCF has voluntarily agreed to pay certain expenses typically borne by CPER to the extent that such expenses exceeded 0.15% (15 basis points) of CPER’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods. USAG For the Six Months Ended For the Six Months Ended June 30, 2015 June 30, 2014 (Unaudited) (Unaudited) Per Share Operating Performance: Net asset value, beginning of period $ 22.97 $ 22.79 Total income (loss) (0.51) 2.52 Net expenses (0.09) (0.12) Net increase (decrease) in net asset value (0.60) 2.40 Net asset value, end of period $ 22.37 $ 25.19 Total Return (2.61) % 10.53 % Ratios to Average Net Assets Total income (loss) (2.41) % 9.98 % Management fees* 0.65 % 0.75 %‸ Total expenses excluding management fees* 2.54 % 0.95 % Expenses waived* (2.39) % (0.72) %‸ Net expenses excluding management fees* 0.15 % 0.23 % Net income (loss) (2.80) % 9.50 % * Annualized ** Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.65% per annum of average daily total net assets for USAG. ‸ Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to waive the management fee paid by USAG from 0.95% to 0.80% per annum of average daily total net assets. USCF has voluntarily agreed to pay certain expenses typically borne by USAG to the extent that such expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods.

Fair Value Of Financial Instr20

Fair Value Of Financial Instruments (Tables)	6 Months Ended
Fair Value Of Financial Instruments (Tables)	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Valuation of Usci's, Cper's, Usag's and Usmi's Securities Using Fair Value Hierarchy	The following table summarizes the valuation of USCI’s securities at June 30, 2015 using the fair value hierarchy: At June 30, 2015 Total Level I Level II Level III Short-Term Investments $ 309,911,832 $ 309,911,832 $ $ Exchange-Traded Futures Contracts Foreign Contracts (15,402,093) (15,402,093) United States Contracts 11,938,610 11,938,610 During the six months ended June 30, 2015, there were no transfers between Level I and Level II. The following table summarizes the valuation of USCI’s securities at December 31, 2014 using the fair value hierarchy: At December 31, 2014 Total Level I Level II Level III Short-Term Investments $ 509,916,252 $ 509,916,252 $ $ Exchange-Traded Futures Contracts Foreign Contracts (27,137,120) (27,137,120) United States Contracts (11,130,039) (11,130,039) During year ended December 31, 2014, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at June 30, 2015 using the fair value hierarchy: At June 30, 2015 Total Level I Level II Level III Short-Term Investments $ 749,713 $ 749,713 $ $ Exchange-Traded Futures Contracts United States Contracts (209,350) (209,350) During the six months ended June 30, 2015, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at December 31, 2014 using the fair value hierarchy: At December 31, 2014 Total Level I Level II Level III Short-Term Investments $ 1,699,497 $ 1,699,497 $ $ Exchange-Traded Futures Contracts United States Contracts (197,525) (197,525) During the year ended December 31, 2014, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at June 30, 2015 using the fair value hierarchy: At June 30, 2015 Total Level I Level II Level III Short-Term Investments $ 849,681 $ 849,681 $ $ Exchange-Traded Futures Contracts Foreign Contracts 55,605 55,605 United States Contracts 100,117 100,117 During the six months ended June 30, 2015, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at December 31, 2014 using the fair value hierarchy: At December 31, 2014 Total Level I Level II Level III Short-Term Investments $ 1,599,523 $ 1,599,523 $ $ Exchange-Traded Futures Contracts Foreign Contracts (76,062) (76,062) United States Contracts 9,486 9,486
Fair Value of Derivative Instruments Held by Usci, Cper, Usag and Usmi	Fair Value of Derivative Instruments Held by USCI Condensed Derivatives not Accounted for Statements of Financial Fair Value Fair Value as Hedging Instruments Condition Location At June 30, 2015 At December 31, 2014 Futures - Commodity Contracts Assets $ (3,463,483) $ (38,267,159) Fair Value of Derivative Instruments Held by CPER Condensed Derivatives not Accounted for Statements of Financial Fair Value Fair Value as Hedging Instruments Condition Location At June 30, 2015 At December 31, 2014 Futures - Commodity Contracts Assets $ (209,350) $ (197,525) Fair Value of Derivative Instruments Held by USAG Condensed Derivatives not Accounted for Statements of Financial Fair Value Fair Value as Hedging Instruments Condition Location At June 30, 2015 At December 31, 2014 Futures - Commodity Contracts Assets $ 155,722 $ (66,576)
Effect of Derivative Instruments on Statements of Operations of Usci, Cper, Usag and Usmi	The Effect of Derivative Instruments on the Condensed Statements of Operations of USCI For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (54,343,959) $ 45,709,634 Change in unrealized gain (loss) on open contracts $ 34,803,676 $ (720,941) The Effect of Derivative Instruments on the Condensed Statements of Operations of CPER For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (189,213) $ (4,012) Change in unrealized gain (loss) on open contracts $ (11,825) $ 36,812 34 The Effect of Derivative Instruments on the Condensed Statements of Operations of USAG For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (274,438) $ 253,494 Change in unrealized gain (loss) on open contracts $ 222,298 $ (2,201)

Organization And Business (Addi

Organization And Business (Additional Information) (Details) - $ / Unit	Jun. 30, 2015	Nov. 15, 2011	Nov. 10, 2010	Aug. 10, 2010
United States Commodity Index Fund [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets			1,000	1,000
United States Commodity Index Fund [Member] \| Creation Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	50,000
United States Commodity Index Fund [Member] \| Marketing Agent [Member] \| Prior to May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	100,000
United States Commodity Index Fund [Member] \| Redemption Baskets [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	350
United States Commodity Index Fund [Member] \| Redemption Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	350
United States Copper Index Fund [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets		1,000
United States Copper Index Fund [Member] \| Creation Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	50,000
United States Copper Index Fund [Member] \| Redemption Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	1,000
United States Copper Index Fund [Member] \| Redemption Baskets [Member] \| Prior to May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	1,000

Summary Of Significant Accoun22

Summary Of Significant Accounting Policies (Additional Information) (Details) - Jun. 30, 2015	$ / Unitshares
United States Commodity Index Fund [Member]
Significant Accounting Policies [Line Items]
Weighted average shares outstanding \| shares	5
United States Copper Index Fund [Member]
Significant Accounting Policies [Line Items]
Weighted average shares outstanding \| shares	40
United States Agriculture Index Fund [Member]
Significant Accounting Policies [Line Items]
Weighted average shares outstanding \| shares	5
Creation Baskets [Member] \| Effective as of May 1, 2012 [Member] \| United States Commodity Index Fund [Member]
Significant Accounting Policies [Line Items]
Number of Units per basket	50,000
Creation Baskets [Member] \| Effective as of May 1, 2012 [Member] \| United States Copper Index Fund [Member]
Significant Accounting Policies [Line Items]
Number of Units per basket	50,000
Creation Baskets [Member] \| Effective as of May 1, 2012 [Member] \| United States Agriculture Index Fund [Member]
Significant Accounting Policies [Line Items]
Number of Units per basket	50,000
Redemption Baskets [Member] \| Effective as of May 1, 2012 [Member] \| United States Commodity Index Fund [Member]
Significant Accounting Policies [Line Items]
Number of Units per basket	350

Trust Series (Additional Inform

Trust Series (Additional Information) (Details)

Sep. 06, 2011

Aug. 10, 2010USD ($)$ / shares$ / Unitshares

Nov. 15, 2011USD ($)$ / shares$ / Unitshares

Sep. 19, 2011shares

Jul. 30, 2010

Dec. 21, 2009USD ($)shares

Jun. 30, 2015USD ($)$ / shares

Dec. 31, 2014USD ($)$ / shares

Jun. 30, 2014$ / shares

Dec. 31, 2013$ / shares

Apr. 13, 2012$ / shares$ / Unit

Nov. 10, 2010USD ($)$ / Unit

Capital Unit [Line Items]

Sponsor capital contribution

$ 1,000

$ 0

Capital contribution to trust series

$ 1,000

Units acquisition | shares

United States Commodity Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission

50,000,000

Initial offering price per unit NAV | $ / shares

$ 50

$ 47.12

$ 48.24

$ 60.44

$ 56.06

Number of units issued | shares

100,000

Value of unit issued

$ 5,000,000

Number of registered units

100,000

Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit

1,000

United States Commodity Index Fund [Member] | Futures Contracts [Member]

Capital Unit [Line Items]

Future contract held

15,534

United States Commodity Index Fund [Member] | Futures Contracts [Member] | NYMEX [Member]

Capital Unit [Line Items]

Future contract held

520

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Ice Futures [Member]

Capital Unit [Line Items]

Future contract held

1,208

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Chicago Board of Trade [Member]

Capital Unit [Line Items]

Future contract held

5,166

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Chicago Mercantile Exchange [Member]

Capital Unit [Line Items]

Future contract held

2,592

United States Commodity Index Fund [Member] | Futures Contracts [Member] | London Metal Exchange [Member]

Capital Unit [Line Items]

Future contract held

5,112

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Commodity Exchange Inc [Member]

Capital Unit [Line Items]

Future contract held

936

United States Agriculture Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission

20,000,000

Initial offering price per unit NAV | $ / shares

$ 22.37

$ 22.97

25.19

22.79

$ 25

Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit

1,000

United States Agriculture Index Fund [Member] | Futures Contracts [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Ice Futures [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Chicago Board of Trade [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Chicago Mercantile Exchange [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Kansas City Board Of Trade [Member]

Capital Unit [Line Items]

Future contract held

United States Metals Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 3,000

United States Copper Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission

30,000,000

Initial offering price per unit NAV | $ / shares

$ 25

$ 17.64

$ 19.10

$ 21.66

$ 22.92

Number of units issued | shares

100,000

Value of unit issued

$ 2,500,000

Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit

1,000

Fees Paid By Each Trust Serie24

Fees Paid By Each Trust Series And Related Party Transactions (Additional Information) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2015
Fees Paid and Related Party Transactions [Line Items]
Trustee annual fee			$ 3,000
Noninterest Expense Directors Fees	$ 28,626	$ 36,547	56,510	$ 67,677
Expense waiver	32,171	23,031	61,779	46,393
Other Cost and Expense Operating	0	850	0	850
Directors and Officers Liability Insurance [Member] \| Subsequent Event [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					$ 120,600
United States Commodity Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees	28,429	36,039	56,042	66,756
Other Cost and Expense Operating	$ 0	850	$ 0	850
United States Commodity Index Fund [Member] \| Subsequent Event [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					119,800
Estimated investor tax reporting cost					690,000
United States Commodity Index Fund [Member] \| Effective May 1, 2014 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.80%		0.80%
United States Copper Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees	$ 103	202	$ 202	338
Costs and expenses annual limit for reimbursement			0.15%
Expense waiver	$ 16,779	13,891	$ 27,603	28,159
United States Copper Index Fund [Member] \| Subsequent Event [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated investor tax reporting cost					46,000
United States Copper Index Fund [Member] \| Effective as of May 29, 2012 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.95%		0.95%
United States Copper Index Fund [Member] \| Effective May 1, 2014 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.95%		0.95%
United States Copper Index Fund [Member] \| Directors and Officers Liability Insurance [Member] \| Subsequent Event [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					400
United States Agriculture Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees	$ 94	159	$ 195	300
Expense waiver	$ 15,392	$ 4,502	$ 25,283	$ 9,013
United States Agriculture Index Fund [Member] \| Subsequent Event [Member]
Fees Paid and Related Party Transactions [Line Items]
Estimated investor tax reporting cost					41,000
United States Agriculture Index Fund [Member] \| Effective as of May 29, 2012 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.65%		0.65%
United States Agriculture Index Fund [Member] \| Effective May 1, 2014 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.65%		0.65%
United States Agriculture Index Fund [Member] \| Directors and Officers Liability Insurance [Member] \| Subsequent Event [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					$ 400
United States Metals Index Fund [Member] \| Effective as of May 29, 2012 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.80%		0.80%

Contracts And Agreements (Broke

Contracts And Agreements (Brokerage Commission) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2014
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 151,919	$ 111,326	$ 352,329	$ 213,535
United States Commodity Index Fund [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 151,217	$ 110,353	350,400	211,599
United States Commodity Index Fund [Member] \| Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions			$ 325,949	$ 201,058
Brokerage commissions as a percentage of average daily net assets	93.02%	95.02%	93.02%	95.02%
United States Commodity Index Fund [Member] \| Creation and Redemption Activity [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions			$ 24,451	$ 10,541
Brokerage commissions as a percentage of average daily net assets	6.98%		6.98%		4.98%
United States Commodity Index Fund [Member] \| Commission [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions as a percentage of average daily net assets	0.12%	0.07%	0.12%	0.07%
United States Copper Index Fund [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 296	$ 473	$ 556	$ 841
United States Copper Index Fund [Member] \| Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions			$ 486	$ 647
Brokerage commissions as a percentage of average daily net assets	87.37%	76.90%	87.37%	76.90%
United States Copper Index Fund [Member] \| Creation and Redemption Activity [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions			$ 70	$ 194
Brokerage commissions as a percentage of average daily net assets	12.63%	23.10%	12.63%	23.10%
United States Copper Index Fund [Member] \| Commission [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions as a percentage of average daily net assets	0.06%	0.06%	0.06%	0.06%
United States Agriculture Index Fund [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 406	$ 301	$ 1,064	$ 702
United States Agriculture Index Fund [Member] \| Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions			$ 1,064	$ 702
Brokerage commissions as a percentage of average daily net assets	100.00%	100.00%	100.00%	100.00%
United States Agriculture Index Fund [Member] \| Creation and Redemption Activity [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions			$ 0	$ 0
Brokerage commissions as a percentage of average daily net assets	0.00%	0.00%	0.00%	0.00%
United States Agriculture Index Fund [Member] \| Commission [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions as a percentage of average daily net assets	0.10%	0.06%	0.10%	0.06%

Contracts And Agreements (Addit

Contracts And Agreements (Additional Information) (Details)	6 Months Ended	12 Months Ended
Contracts And Agreements (Additional Information) (Details)	Jun. 30, 2015USD ($)$ / Unit	Dec. 31, 2015	Dec. 31, 2014USD ($)
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Annual transfer agency services fee	$ 20,000
Management fee description		For USCI, the fee is equal to the percentage fees paid to USCF minus 0.14%, with that result multiplied by 0.5, minus 0.06% to arrive at the actual fee paid. For each of CPER and USAG, the fee is equal to the percentage fees paid to USCF minus 0.18%, with that result multiplied by 0.5, minus 0.06% to arrive at the actual fee paid.
Licensing Agreements [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Annual licensing fee			$ 15,000
Management fee paid to SummerHaven by USCF			annual fee of 0.06% of the average daily total net assets of each Trust Series.
Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Transaction fees per transaction \| $ / Unit	15
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts \| $ / Unit	15
Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 75,000
Transaction fees per transaction \| $ / Unit	7
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts \| $ / Unit	7
For the first $500 million [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.06%
For the first $500 million [Member] \| Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 500,000,000
Combined net assets greater than $500 million but less than $1 billion [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.0465%
Combined net assets greater than $500 million but less than $1 billion [Member] \| Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 1,000,000,000
Combined net assets greater than $500 million but less than $1 billion [Member] \| Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 500,000,000
Combined net assets exceed $1 billion [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.035%
Combined net assets exceed $1 billion [Member] \| Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 1,000,000,000
Marketing Agreement [Member] \| Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	10.00%
Marketing Agreement [Member] \| Minimum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.04%
Marketing Agreement [Member] \| On each Trust Series' assets up to 3 billion [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Fee percentage	0.06%
Marketing Agreement [Member] \| On each Trust Series' assets up to 3 billion [Member] \| Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 3,000,000,000
Marketing Agreement [Member] \| On each Trust Series' assets in excess of $3 billion [Member] \| Maximum [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Base amount for determining fee percentage	$ 3,000,000,000

Financial Instruments, Off-Ba27

Financial Instruments, Off-Balance Sheet Risks and Contingencies (Additional Information) (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
United States Commodity Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	$ 564,859,627	$ 792,207,276
United States Copper Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	1,966,549	3,066,521
United States Agriculture Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	$ 2,073,961	$ 2,365,241

Financial Highlights (Per Unit

Financial Highlights (Per Unit Performance Data and Other Supplemental Financial Data) (Details) - $ / shares		6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014
United States Commodity Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period		$ 48.24		$ 56.06
Total income (loss)		(0.86)		4.69
Net expenses		(0.26)		(0.31)
Net increase (decrease) in net asset value		(1.12)		4.38
Net asset value, end of period		$ 47.12		$ 60.44
Total Return		(2.32%)		7.81%
Ratios to Average Net Assets
Total income (loss)		(3.22%)		7.81%
Management fees	[1],[2]	0.80%		0.89%
Total expenses excluding management fees	[1]	0.32%		0.18%
Expenses waived	[1]	0.00%		0.00%
Net expenses excluding management fees	[1]	0.32%		0.18%
Net income (loss)		(3.78%)		7.28%
United States Copper Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period		$ 19.10		$ 22.92
Total income (loss)		(1.39)		(1.17)
Net expenses		(0.07)		(0.09)
Net increase (decrease) in net asset value		(1.46)		(1.26)
Net asset value, end of period		$ 17.64		$ 21.66
Total Return		(7.64%)		(5.50%)
Ratios to Average Net Assets
Total income (loss)		(10.53%)		1.12%
Management fees	[1],[3]	0.65%		0.65%
Total expenses excluding management fees	[1]	3.08%	[4]	2.08%
Expenses waived	[1]	(2.93%)	[4]	(1.85%)	[5]
Net expenses excluding management fees	[1]	0.15%	[4]	0.23%
Net income (loss)		(10.93%)		0.68%
United States Agriculture Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period		$ 22.97		$ 22.79
Total income (loss)		(0.51)		2.52
Net expenses		(0.09)		(0.12)
Net increase (decrease) in net asset value		(0.60)		2.40
Net asset value, end of period		$ 22.37		$ 25.19
Total Return		(2.61%)		10.53%
Ratios to Average Net Assets
Total income (loss)		(2.41%)		9.98%
Management fees	[1],[6]	0.65%		0.75%
Total expenses excluding management fees	[1]	2.54%	[7]	0.95%
Expenses waived	[1]	(2.39%)	[7]	(0.72%)	[8]
Net expenses excluding management fees	[1]	0.15%	[7]	0.23%
Net income (loss)		(2.80%)		9.50%

[1]	Annualized.
[2]	Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.80% per annum of average daily total net assets for USCI.
[3]	Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.65% per annum of average daily total net assets for CPER.
[4]	USCF has voluntarily agreed to pay certain expenses typically borne by CPER to the extent that such expenses exceeded 0.15% (15 basis points) of CPER’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods.
[5]	Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to lower the management fee paid by CPER from 0.95% to 0.80% per annum of average daily total net assets.
[6]	Effective May 1, 2014 and continuing through December 31, 2015, USCF has contractually agreed to lower the management fee to 0.65% per annum of average daily total net assets for USAG.
[7]	USCF has voluntarily agreed to pay certain expenses typically borne by USAG to the extent that such expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods.
[8]	Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to lower the management fee paid by USAG from 0.95% to 0.80% per annum of average daily total net assets.

Financial Highlights (Per Uni29

Financial Highlights (Per Unit Performance Data and Other Supplemental Financial Data) (Parenthetical) (Details)		6 Months Ended				43 Months Ended
		Jun. 30, 2015		Jun. 30, 2014		Dec. 31, 2015
United States Copper Index Fund [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense	[1]	2.93%	[2]	1.85%	[3]
United States Copper Index Fund [Member] \| Maximum [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense						0.95%
United States Copper Index Fund [Member] \| Minimum [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense						0.80%
United States Agriculture Index Fund [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense	[1]	2.39%	[4]	0.72%	[5]
United States Agriculture Index Fund [Member] \| Maximum [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense						0.95%
United States Agriculture Index Fund [Member] \| Minimum [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense						0.80%

[1]	Annualized.
[2]	USCF has voluntarily agreed to pay certain expenses typically borne by CPER to the extent that such expenses exceeded 0.15% (15 basis points) of CPER’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods.
[3]	Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to lower the management fee paid by CPER from 0.95% to 0.80% per annum of average daily total net assets.
[4]	USCF has voluntarily agreed to pay certain expenses typically borne by USAG to the extent that such expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis, through at least December 31, 2015. USCF has no obligation to continue such payments into subsequent periods.
[5]	Effective as of May 30, 2012 (and continuing through December 31, 2015), USCF voluntarily agreed to lower the management fee paid by USAG from 0.95% to 0.80% per annum of average daily total net assets.

Fair Value Of Financial Instr30

Fair Value Of Financial Instruments (Valuation of Securities Using Fair Value Hierarchy) (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
United States Commodity Index Fund [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 309,911,832	$ 509,916,252
United States Commodity Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(15,402,093)	(27,137,120)
United States Commodity Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	11,938,610	(11,130,039)
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	309,911,832	509,916,252
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(15,402,093)	(27,137,120)
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	11,938,610	(11,130,039)
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	749,713	1,699,497
United States Copper Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(209,350)	(197,525)
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	749,713	1,699,497
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(209,350)	(197,525)
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	849,681	1,599,523
United States Agriculture Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	55,605	(76,062)
United States Agriculture Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	100,117	9,486
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	849,681	1,599,523
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	55,605	(76,062)
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	100,117	9,486
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 0	$ 0

Fair Value Of Financial Instr31

Fair Value Of Financial Instruments (Fair Value of Derivative Instrument held by Usci, Cper, Usag and Usmi) (Details) - Commodity Contracts [Member] - Futures [Member] - Assets [Member] - USD ($)	Jun. 30, 2015	Dec. 31, 2014
United States Commodity Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ (3,463,483)	$ (38,267,159)
United States Copper Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	(209,350)	(197,525)
United States Agriculture Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ 155,722	$ (66,576)

Fair Value Of Financial Instr32

Fair Value Of Financial Instruments (Effect of Derivative Instruments on Statements of Operations of Usci, Cper, Usag and Usmi) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income	$ (5,316,894)	$ 18,933,549	$ (54,990,026)	$ 45,938,946
Change in Unrealized Loss on Derivatives Recognized in Income			35,150,713	(519,102)
United States Commodity Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income	(5,385,302)	18,838,461	(54,343,959)	45,709,634
Change in Unrealized Loss on Derivatives Recognized in Income			34,803,676	(720,941)
United States Commodity Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income			(54,343,959)	45,709,634
United States Commodity Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Loss on Derivatives Recognized in Income			34,803,676	(720,941)
United States Copper Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income	173,162	(9,675)	(189,213)	(4,012)
Change in Unrealized Loss on Derivatives Recognized in Income			(11,825)	36,812
United States Copper Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income			(189,213)	(4,012)
United States Copper Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Loss on Derivatives Recognized in Income			(11,825)	36,812
United States Agriculture Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income	$ (104,754)	$ 93,360	(274,438)	253,494
Change in Unrealized Loss on Derivatives Recognized in Income			222,298	(2,201)
United States Agriculture Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Loss on Derivatives Recognized in Income			(274,438)	253,494
United States Agriculture Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Loss on Derivatives Recognized in Income			$ 222,298	$ (2,201)