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Condensed Statements of Operations - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed futures contracts		$ (492,221)	$ 5,789,281	$ (1,925,589)	$ 10,264,256
Change in unrealized gain (loss) on open futures contracts		(1,464,219)	3,598,029	13,130,099	5,462,074
Dividend income		80,197	60,127	150,417	114,237
Interest income	[1]	266,616	287,399	538,649	528,254
ETF transaction fees		2,450	1,050	3,150	3,500
Total income (loss)		(1,607,177)	9,735,886	11,896,726	16,372,321
Expenses
General Partner management fees (Note 3)		87,543	126,585	176,157	253,881
Professional fees		38,520	36,319	76,616	74,415
Brokerage commissions		1,985	2,645	3,857	3,219
Directors' fees and insurance		2,738	3,583	6,005	6,814
License fees		2,189	3,165	4,404	6,347
Total expenses		132,975	172,297	267,039	344,676
Net income (loss)		$ (1,740,152)	$ 9,563,589	$ 11,629,687	$ 16,027,645
Net income (loss) per limited partnership share		$ (0.72)	$ 2.72	$ 3.98	$ 4.32
Net income (loss) per weighted average limited partnership share		$ (0.67)	$ 2.70	$ 4.27	$ 4.28
Weighted average limited partnership shares outstanding		2,610,440	3,541,758	2,725,691	3,746,133
[1] Interest income does not exceed paid in kind of 5%.

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