Statements of Cash Flows - USD ($)
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Cash Flows from Operating Activities: |
|
|
|
| Net income (loss) |
$ (15,481,384)
|
$ (104,689,203)
|
$ (142,441,682)
|
| 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 |
16,052,639
|
24,535,826
|
(60,098,264)
|
| Unrealized (gain) loss on open futures contracts |
(10,811,030)
|
(29,911,129)
|
49,496,908
|
| (Increase) decrease in receivable from Sponsor |
(31,888)
|
3,829
|
125,972
|
| (Increase) decrease in interest receivable |
46
|
36
|
0
|
| (Increase) decrease in directors' fees and insurance receivable |
6,222
|
(6,222)
|
0
|
| (Increase) decrease in ETF transaction fees receivable |
(350)
|
1,050
|
(700)
|
| Increase (decrease) in management fees payable |
87,459
|
(172,944)
|
128,225
|
| Increase (decrease) in professional fees payable |
(75,269)
|
163,900
|
18,255
|
| Increase (decrease) in brokerage commissions payable |
11,200
|
0
|
20,000
|
| Increase (decrease) in directors' fees and insurance payable |
6,162
|
(15,792)
|
7,553
|
| Increase (decrease) in registration fees payable |
0
|
0
|
(152)
|
| Net cash provided by (used in) operating activities |
(10,236,193)
|
(110,090,649)
|
(152,743,885)
|
| Cash Flows from Financing Activities: |
|
|
|
| Addition of shares |
210,492,228
|
156,421,629
|
451,486,732
|
| Redemption of shares |
(69,828,108)
|
(286,982,884)
|
(60,265,183)
|
| Net cash provided by (used in) financing activities |
140,664,120
|
(130,561,255)
|
391,221,549
|
| Net Increase (Decrease) in Cash and Cash Equivalents |
130,427,927
|
(240,651,904)
|
238,477,664
|
| Cash and Cash Equivalents, beginning of year |
478,007,269
|
718,659,173
|
480,181,509
|
| Cash and Cash Equivalents, end of year |
608,435,196
|
478,007,269
|
718,659,173
|
| United States Commodity Index Fund [Member] |
|
|
|
| Cash Flows from Operating Activities: |
|
|
|
| Net income (loss) |
(15,639,651)
|
(103,688,366)
|
(141,838,473)
|
| 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 |
15,941,203
|
24,230,603
|
(59,905,773)
|
| Unrealized (gain) loss on open futures contracts |
(10,637,687)
|
(29,684,932)
|
49,056,906
|
| (Increase) decrease in directors' fees and insurance receivable |
6,190
|
(6,190)
|
0
|
| (Increase) decrease in ETF transaction fees receivable |
(350)
|
1,050
|
(700)
|
| Increase (decrease) in management fees payable |
85,619
|
(172,237)
|
128,287
|
| Increase (decrease) in professional fees payable |
(133,821)
|
199,184
|
151,042
|
| Increase (decrease) in brokerage commissions payable |
11,200
|
0
|
20,000
|
| Increase (decrease) in directors' fees and insurance payable |
6,164
|
(15,638)
|
7,439
|
| Increase (decrease) in registration fees payable |
0
|
0
|
(152)
|
| Net cash provided by (used in) operating activities |
(10,361,133)
|
(109,136,526)
|
(152,381,424)
|
| Cash Flows from Financing Activities: |
|
|
|
| Addition of shares |
207,139,996
|
155,622,096
|
448,368,483
|
| Redemption of shares |
(69,828,108)
|
(284,155,249)
|
(58,125,632)
|
| Net cash provided by (used in) financing activities |
137,311,888
|
(128,533,153)
|
390,242,851
|
| Net Increase (Decrease) in Cash and Cash Equivalents |
126,950,755
|
(237,669,679)
|
237,861,427
|
| Cash and Cash Equivalents, beginning of year |
474,315,271
|
711,984,950
|
474,123,523
|
| Cash and Cash Equivalents, end of year |
601,266,026
|
474,315,271
|
711,984,950
|
| United States Copper Index Fund [Member] |
|
|
|
| Cash Flows from Operating Activities: |
|
|
|
| Net income (loss) |
237,032
|
(635,936)
|
(405,270)
|
| 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 |
180,275
|
(96,292)
|
(211,188)
|
| Unrealized (gain) loss on open futures contracts |
(269,200)
|
(16,900)
|
327,688
|
| (Increase) decrease in receivable from Sponsor |
(16,039)
|
(16,771)
|
38,959
|
| (Increase) decrease in interest receivable |
0
|
25
|
0
|
| (Increase) decrease in directors' fees and insurance receivable |
32
|
(32)
|
0
|
| Increase (decrease) in management fees payable |
1,882
|
(456)
|
383
|
| Increase (decrease) in professional fees payable |
30,138
|
2,581
|
(40,651)
|
| Increase (decrease) in directors' fees and insurance payable |
47
|
(35)
|
19
|
| Net cash provided by (used in) operating activities |
164,167
|
(763,816)
|
(290,060)
|
| Cash Flows from Financing Activities: |
|
|
|
| Addition of shares |
3,352,232
|
799,533
|
3,118,249
|
| Redemption of shares |
0
|
(893,834)
|
(2,139,551)
|
| Net cash provided by (used in) financing activities |
3,352,232
|
(94,301)
|
978,698
|
| Net Increase (Decrease) in Cash and Cash Equivalents |
3,516,399
|
(858,117)
|
688,638
|
| Cash and Cash Equivalents, beginning of year |
1,871,256
|
2,729,373
|
2,040,735
|
| Cash and Cash Equivalents, end of year |
5,387,655
|
1,871,256
|
2,729,373
|
| United States Agricultural Index Fund [Member] |
|
|
|
| Cash Flows from Operating Activities: |
|
|
|
| Net income (loss) |
(78,765)
|
(317,082)
|
17,663
|
| 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 |
(68,839)
|
83,359
|
7,255
|
| Unrealized (gain) loss on open futures contracts |
95,857
|
(72,733)
|
22,043
|
| (Increase) decrease in receivable from Sponsor |
(15,849)
|
(17,185)
|
42,633
|
| (Increase) decrease in interest receivable |
46
|
0
|
0
|
| Increase (decrease) in management fees payable |
(42)
|
877
|
(276)
|
| Increase (decrease) in professional fees payable |
28,414
|
1,131
|
(45,500)
|
| Increase (decrease) in directors' fees and insurance payable |
(49)
|
(40)
|
52
|
| Net cash provided by (used in) operating activities |
(39,227)
|
(321,673)
|
43,870
|
| Cash Flows from Financing Activities: |
|
|
|
| Addition of shares |
0
|
0
|
0
|
| Redemption of shares |
0
|
0
|
0
|
| Net cash provided by (used in) financing activities |
0
|
0
|
0
|
| Net Increase (Decrease) in Cash and Cash Equivalents |
(39,227)
|
(321,673)
|
43,870
|
| Cash and Cash Equivalents, beginning of year |
1,820,742
|
2,142,415
|
2,098,545
|
| Cash and Cash Equivalents, end of year |
$ 1,781,515
|
$ 1,820,742
|
$ 2,142,415
|