Statements of Operations - USD ($)
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Gain (loss) on trading of commodity futures contracts: |
|
|
|
| Realized gain (loss) on closed futures contracts |
$ 27,857,540
|
$ (41,811,240)
|
$ (19,750,710)
|
| Change in unrealized gain (loss) on open futures contracts |
9,775,220
|
(1,095,250)
|
(6,375,760)
|
| Realized gain (loss) on short-term investments |
0
|
10
|
17
|
| Dividend income |
66,811
|
1,936
|
1,252
|
| Interest income |
290,408
|
63,675
|
10,869
|
| ETF transaction fees |
14,350
|
24,150
|
15,050
|
| Total income (loss) |
38,004,329
|
(42,816,719)
|
(26,099,282)
|
| Expenses |
|
|
|
| General Partner management fees (Note 3) |
832,667
|
690,367
|
286,806
|
| Professional fees |
179,655
|
147,894
|
178,177
|
| Brokerage commissions |
165,409
|
114,922
|
27,058
|
| Directors' fees and insurance |
11,565
|
10,575
|
9,150
|
| Total expenses |
1,189,296
|
963,758
|
501,191
|
| Expense waiver (Note 3) |
(190,095)
|
(135,317)
|
(148,604)
|
| Net expenses |
999,201
|
828,441
|
352,587
|
| Net income (loss) |
$ 37,005,128
|
$ (43,645,160)
|
$ (26,451,869)
|
| Net income (loss) per limited partnership share |
$ 3.48
|
$ (10.17)
|
$ (21.42)
|
| Net income (loss) per weighted average limited partnership share |
$ 4.49
|
$ (9.02)
|
$ (26.86)
|
| Weighted average limited partnership shares outstanding |
8,243,989
|
4,836,438
|
984,795
|