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Condensed Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities:
Net income (loss)	$ (25,119,958)	$ 13,369,839
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Unrealized (gain) loss on open futures contracts	24,361,247	(14,594,318)
(Increase) decrease in dividends receivable	9,571	(31,772)
(Increase) decrease in interest receivable	5,576	(744)
(Increase) decrease in prepaid insurance	(4,480)	1,433
(Increase) decrease in ETF transaction fees receivable	(350)	0
Increase (decrease) in General Partner management fees payable	(7,897)	(1,042)
Increase (decrease) in professional fees payable	(53,646)	(45,275)
Increase (decrease) in brokerage commissions payable	1,080	0
Increase (decrease) in directors' fees payable	(473)	(57)
Increase (decrease) in insurance payable	0	6
Increase (decrease) in license fees payable	(352)	(701)
Net cash provided by (used in) operating activities	(809,682)	(1,302,631)
Cash Flows from Financing Activities:
Addition of partnership shares	20,860,352	0
Redemption of partnership shares	(3,396,329)	(2,237,484)
Net cash provided by (used in) financing activities	17,464,023	(2,237,484)
Net Increase (Decrease) in Cash and Cash Equivalents	16,654,341	(3,540,115)
Total Cash, Cash Equivalents and Equity in Trading Accounts, beginning of period	51,606,975	66,728,725
Total Cash, Cash Equivalents and Equity in Trading Accounts, end of period	$ 68,261,316	$ 63,188,610

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