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Condensed Statements of Operations - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed futures contracts		$ 7,166,117	$ (390,455)	$ 17,430,373	$ 6,228,639
Change in unrealized gain (loss) on open futures contracts		(2,150,147)	10,164,685	3,311,927	(17,358,999)
Dividend income		65,990	51,363	180,227	137,832
Interest income	[1]	322,972	219,011	851,226	471,942
ETF transaction fees		1,750	2,800	5,250	7,350
Total income (loss)		5,406,682	10,047,404	21,779,003	(10,513,236)
Expenses
General Partner management fees (Note 3)		120,405	168,628	374,286	501,114
Professional fees		34,342	33,197	108,757	158,997
Brokerage commissions		2,282	4,643	5,501	13,484
Directors' fees and insurance		3,642	3,844	10,456	10,432
License fees		3,010	4,216	9,357	12,528
Total expenses		163,681	214,528	508,357	696,555
Net income (loss)		$ 5,243,001	$ 9,832,876	$ 21,270,646	$ (11,209,791)
Net income (loss) per limited partnership share		$ 1.77	$ 1.52	$ 6.09	$ (2.08)
Net income (loss) per weighted average limited partnership share		$ 1.64	$ 1.53	$ 5.98	$ (1.81)
Weighted average limited partnership shares outstanding		3,187,500	6,439,130	3,557,875	6,179,670
[1] Interest income does not exceed paid in kind of 5%.

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