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) |
$ 37,005,128
|
$ (43,645,160)
|
$ (26,451,869)
|
| 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 |
12,434,314
|
(11,579,384)
|
(5,881,741)
|
| Unrealized (gain) loss on open futures contracts |
(9,775,220)
|
1,095,250
|
6,375,760
|
| (Increase) decrease in receivable from General Partner |
(54,380)
|
(41,001)
|
(13,711)
|
| (Increase) decrease in dividends receivable |
(10,339)
|
(13)
|
558
|
| (Increase) decrease in ETF transaction fees receivable |
0
|
0
|
(350)
|
| Increase (decrease) in General Partner management fees payable |
25,134
|
27,097
|
4,068
|
| Increase (decrease) in professional fees payable |
(5,790)
|
(2,625)
|
(24,606)
|
| Increase (decrease) in brokerage commissions payable |
1,430
|
4,060
|
865
|
| Increase (decrease) in directors' fees and insurance payable |
523
|
323
|
129
|
| Net cash provided by (used in) operating activities |
39,620,800
|
(54,141,453)
|
(25,990,897)
|
| Cash Flows from Financing Activities: |
|
|
|
| Addition of partnership shares |
41,041,049
|
124,538,212
|
75,499,118
|
| Redemption of partnership shares |
(45,491,088)
|
(38,808,966)
|
(38,357,031)
|
| Net cash provided by (used in) financing activities |
(4,450,039)
|
85,729,246
|
37,142,087
|
| Net Increase (Decrease) in Cash and Cash Equivalents |
35,170,761
|
31,587,793
|
11,151,190
|
| Cash and Cash Equivalents, beginning of year |
67,996,295
|
36,408,502
|
25,257,312
|
| Cash and Cash Equivalents, end of year |
$ 103,167,056
|
$ 67,996,295
|
$ 36,408,502
|