XML 25 R8.htm IDEA: XBRL DOCUMENT v3.8.0.1
Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash Flows from Operating Activities:      
Net income (loss) $ (193,443,975) $ 98,732,182 $ (245,141,023)
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 (56,035,182) (20,024,673) 201,219,414
Unrealized (gain) loss on open futures contracts (18,286,173) 63,973,835 (269,221,125)
(Increase) decrease in dividends receivable (2,090) (14,212) 6,665
(Increase) decrease in interest receivable (11,573) 0 0
(Increase) decrease in directors' fees and insurance receivable 0 26,732 (9,371)
(Increase) decrease in prepaid registration fees 29,526 404,792 58,107
(Increase) decrease in ETF transaction fees receivable 0 0 (2,000)
Increase (decrease) in payable due to Broker (44,770,339) 3,906,389 40,863,950
Increase (decrease) in General Partner management fees payable 9,112 53,400 (114,291)
Increase (decrease) in professional fees payable 455,541 (713,180) (162,250)
Increase (decrease) in brokerage commissions payable (12,400) 1,450 11,000
Increase (decrease) in directors' fees and insurance payable 2,928 5,417 0
Increase (decrease) in license fees payable (7,138) (1,954) (6,027)
Net cash provided by (used in) operating activities (312,071,763) 146,350,178 (272,496,951)
Cash Flows from Financing Activities:      
Addition of partnership shares 1,786,316,120 726,382,450 1,626,007,655
Redemption of partnership shares (1,446,127,327) (803,743,255) (1,489,547,553)
Net cash provided by (used in) financing activities 340,188,793 (77,360,805) 136,460,102
Net Increase (Decrease) in Cash and Cash Equivalents 28,117,030 68,989,373 (136,036,849)
Cash and Cash Equivalents, beginning of year 522,819,857 453,830,484 589,867,333
Cash and Cash Equivalents, end of year $ 550,936,887 $ 522,819,857 $ 453,830,484