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Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash Flows from Operating Activities: |  |  |
Net income (loss) | $ 26,763,267 | $ (15,190,394) | $ 15,451,090
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |  |
Unrealized (gain) loss on open futures contracts | (7,451,120) | 11,877,420 | (3,255,030)
(Increase) decrease in receivable from General Partner | 1,610 | 249,791 | (141,688)
(Increase) decrease in dividends receivable | (8,304) | (821) | (6,613)
(Increase) decrease in interest receivable | (3,515) | 8,188 | (9,575)
(Increase) decrease in prepaid insurance | (588) | (527) | (311)
(Increase) decrease in ETF transaction fees receivable | 0 | 350 | 350
Increase (decrease) in General Partner management fees payable | 2,391 | (11,475) | (12,926)
Increase (decrease) in professional fees payable | (72,583) | (52,980) | 135,701
Increase (decrease) in brokerage commissions payable | 0 | (2,500) | (1,860)
Increase (decrease) in directors' fees payable | 349 | 778 | 255
Net cash provided by (used in) operating activities | 19,231,507 | (3,122,170) | 12,159,393
Cash Flows from Financing Activities: |  |  |
Addition of partnership shares | 17,034,820 | 41,996,934 | 40,082,469
Redemption of partnership shares | (32,720,529) | (51,328,625) | (71,195,236)
Net cash provided by (used in) financing activities | (15,685,709) | (9,331,691) | (31,112,767)
Cash and Cash Equivalents, Period Increase (Decrease). | 3,545,798 | (12,453,861) | (18,953,374)
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period | 80,057,642 | 92,511,503 | 111,464,877
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period | $ 83,603,440 | $ 80,057,642 | $ 92,511,503

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