	Three months ended June 30, 2019			Three months ended June 30, 2018			Six months ended June 30, 2019			Six months ended June 30, 2018
Per Share Operation Performance
Net asset value at beginning of period	$	15.22		$	17.99		$	16.11		$	18.77
Income from investment operations:
Investment income		0.11			0.09			0.22			0.09
Net realized and unrealized gain (loss) on commodity futures contracts		1.22			(1.50	)		0.37			0.59
Total expenses, net		(0.15	)		(0.15	)		(0.30	)		(0.36	)
Net increase (decrease) in net asset value		1.18			(1.56	)		0.29			0.32
Net asset value at end of period	$	16.40		$	16.43		$	16.40		$	19.09
Total Return		7.75	%		(8.67	)%		1.80	%		1.70	%
Ratios to Average Net Assets (Annualized)
Total expenses		3.86	%		3.95	%		3.77	%		4.26	%
Total expenses, net		3.86	%		3.43	%		3.75	%		3.78	%
Net investment loss		(1.17	)%		(1.37	)%		(1.06	)%		(2.83	)%

	Three months ended June 30, 2019			Three months ended June 30, 2018			Six months ended June 30, 2019			Six months ended June 30, 2018
Per Share Operation Performance
Net asset value at beginning of period	$	15.79		$	19.04		$	16.20		$	17.85
Income from investment operations:
Investment income		0.10			0.09			0.21			0.17
Net realized and unrealized loss on commodity futures contracts		(0.02	)		(2.74	)		(0.39	)		(1.45	)
Total expenses, net		(0.15	)		(0.17	)		(0.30	)		(0.35	)
Net decrease in net asset value		(0.07	)		(2.82	)		(0.48	)		(1.63	)
Net asset value at end of period	$	15.72		$	16.22		$	15.72		$	16.22
Total Return		(0.44	)%		(14.81	)%		(2.96	)%		(9.13	)%
Ratios to Average Net Assets (Annualized)
Total expenses		4.38	%		5.92	%		4.48	%		6.45	%
Total expenses, net		3.90			3.84	%		3.75	%		3.84	%
Net investment loss		(1.24	)%		(1.85	)%		(1.08	)%		(1.99	)%

	Three months ended June 30, 2019			Three months ended June 30, 2018			Six months ended June 30, 2019			Six months ended June 30, 2018
Per Share Operation Performance
Net asset value at beginning of period	$	7.30		$	8.29		$	7.07		$	9.79
Income (loss) from investment operations:
Investment income		0.05			0.04			0.09			0.07
Net realized and unrealized (loss) gain on commodity futures contracts		(0.18	)		(0.64	)		0.07			(2.10	)
Total expenses, net		(0.07	)		(0.07	)		(0.13	)		(0.14	)
Net (decrease) increase in net asset value		(0.20	)		(0.67	)		0.03			(2.17	)
Net asset value at end of period	$	7.10		$	7.62		$	7.10		$	7.62
Total Return		(2.74	)%		(8.08	)%		0.42	%		(22.17	)%
Ratios to Average Net Assets (Annualized)
Total expenses		5.97	%		5.81	%		5.56	%		6.64	%
Total expenses, net		3.69	%		3.70	%		3.63	%		3.63	%
Net investment loss		(1.09	)%		(1.76	)%		(1.05	)%		(1.81	)%

	Three months ended June 30, 2019			Three months ended June 30, 2018			Six months ended June 30, 2019			Six months ended June 30, 2018
Per Share Operation Performance
Net asset value at beginning of period	$	5.30		$	6.19		$	5.95		$	5.99
Income (loss) from investment operations:
Investment income		0.03			0.03			0.07			0.06
Net realized and unrealized gain (loss) on commodity futures contracts		0.47			0.21			(0.17	)		0.44
Total expenses, net		(0.05	)		(0.06	)		(0.10	)		(0.12	)
Net increase (decrease) in net asset value		0.45			0.18			(0.20	)		0.38
Net asset value at end of period	$	5.75		$	6.37		$	5.75		$	6.37
Total Return		8.49	%		2.91	%		(3.36	)%		6.34	%
Ratios to Average Net Assets (Annualized)
Total expenses		3.85	%		4.54	%		3.73	%		4.26	%
Total expenses, net		3.85	%		3.83	%		3.72	%		3.83	%
Net investment loss		(1.18	)%		(1.81	)%		(1.03	)%		(1.98	)%

	Three months ended June 30, 2019			Three months ended June 30, 2018			Six months ended June 30, 2019			Six months ended June 30, 2018
Per Share Operation Performance
Net asset value at beginning of period	$	19.51		$	22.79		$	20.33		$	22.75
Income (loss) from investment operations:
Net realized and unrealized gain (loss) on investment transactions		0.64			(1.65	)		(0.17	)		(1.58	)
Total expenses, net		(0.01	)		(0.03	)		(0.02	)		(0.06	)
Net increase (decrease) in net asset value		0.63			(1.68	)		(0.19	)		(1.64	)
Net asset value at end of period	$	20.14		$	21.11		$	20.14		$	21.11
Total Return		3.23	%		(7.37	)%		(0.93	)%		(7.21	)%
Ratios to Average Net Assets (Annualized)
Total expenses		2.15	%		2.99	%		4.06	%		4.47	%
Total expenses, net		0.19	%		0.50	%		0.19	%		0.50	%
Net investment loss		(0.19	)%		(0.50	)%		(0.19	)%		(0.50	)%