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Condensed Statements of Cash Flows - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Cash Flows from Operating Activities: |  |
Net income (loss) | $ 1,353,809 | $ (5,217,256)
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 | 7,504,543 | (1,821,701)
Unrealized (gain) loss on open futures contracts | (10,861,510) | (1,240,277)
(Increase) decrease in dividends receivable | (2,259) | 28
(Increase) decrease in directors' fees and insurance receivable | (1,872) | (1,659)
(Increase) decrease in ETF transaction fees receivable | 0 | 350
Increase (decrease) in General Partner management fees payable | 21,427 | 19,520
Increase (decrease) in professional fees payable | (73,667) | (100,760)
Increase (decrease) in brokerage commissions payable | 2,200 | 2,250
Increase (decrease) in directors' fees and insurance payable | (742) | (16)
Increase (decrease) in license fees payable | 965 | 787
Net cash provided by (used in) operating activities | (2,057,106) | (8,358,734)
Cash Flows from Financing Activities: |  |
Addition of partnership shares | 39,299,030 | 41,194,167
Net cash provided by (used in) financing activities | 39,299,030 | 41,194,167
Net Increase (Decrease) in Cash and Cash Equivalents | 37,241,924 | 32,835,433
Cash and Cash Equivalents, beginning of period | 61,380,282 | 33,464,533
Cash and Cash Equivalents, end of period | $ 98,622,206 | $ 66,299,966

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