Schedules of Investments (Unaudited) (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Investment [Table Text Block]

Security Description	Face Amount		Fair Value
U.S. Treasury bills(a)(b):
1.57% due 04/07/20	$	3,755,000	$	3,754,958
0.31% – 1.55% due 04/16/20		139,000,000		138,995,656
1.55% – 1.61% due 04/23/20		55,000,000		54,998,941
1.51% – 1.54% due 05/07/20		55,000,000		54,996,494
1.55% – 1.57% due 05/14/20		20,465,000		20,463,106
0.47% – 1.55% due 05/21/20		80,000,000		79,992,778
1.52% due 06/11/20		23,150,000		23,145,822
1.13% due 06/25/20		50,000,000		49,992,150
1.54% due 07/02/20		45,000,000		44,988,500
1.06% due 08/06/20		20,000,000		19,993,985
Total U.S. Treasury bills (Cost: $490,592,111)				491,322,390
Total Investments – 97.96%				491,322,390
Other Assets, Less Liabilities – 2.04%				10,224,366
Net Assets – 100.00%			$	501,546,756

Security Description	Face Amount		Fair Value
U.S. Treasury bills(a)(b):
1.56% due 01/07/20		50,000,000	$	49,990,521
1.54% – 1.87% due 01/16/20		85,000,000		84,953,805
1.62% due 01/21/20		50,600,000		50,560,743
1.87% due 01/23/20		50,000,000		49,957,125
1.55% due 01/30/20		100,000,000		99,886,820
1.56% due 02/04/20		15,000,000		14,978,480
1.88% – 1.93% due 02/06/20		70,000,000		69,898,597
1.55% due 02/13/20		65,000,000		64,887,198
1.55% due 02/20/20		30,000,000		29,938,138
1.81% due 02/27/20		15,000,000		14,964,767
1.53% – 1.61% due 03/12/20		75,000,000		74,780,885
1.55% due 03/26/20		25,000,000		24,912,048
1.55% due 04/16/20		35,000,000		34,845,071
1.55% – 1.61% due 04/23/20		55,000,000		54,737,729
1.51% due 05/07/20		15,000,000		14,920,003
1.55% due 05/14/20		16,400,000		16,307,435
Total U.S. Treasury bills (Cost: $750,419,242)				750,519,365
Total Investments – 96.80%				750,519,365
Other Assets, Less Liabilities – 3.20%				24,823,740
Net Assets – 100.00%			$	775,343,105

Schedule of Derivative Instruments [Table Text Block]

Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
36,555	June 15, 2020	$	499,758,027	$	(125,957,813	)

Number of Contracts	Expiration Date	Current Notional Amount		Net Unrealized Appreciation (Depreciation)
32,510	March 16, 2020	$	773,217,840	$	19,634,651