Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)		Jun. 30, 2021		Dec. 31, 2020
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		99.46%		99.40%
United States Treasury Obligations, Value		$ 35,996,595		$ 54,989,124
Affiliated investments, at value (cost $86,591,510 and $86,092,194, respectively)		86,540,585		86,041,269
Investments in Securities, Value		122,537,180		141,030,393
Investments in Securities, Cost		$ 122,588,297		$ 141,078,285
Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		70.24%		60.64%
Affiliated investments, at value (cost $86,591,510 and $86,092,194, respectively)		$ 86,540,585		$ 86,041,269
Investments in Securities, Cost		$ 86,591,510		$ 86,092,194
U.S. Treasury Bills, 0.040% due August 5, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	12.99%
United States Treasury Obligations, Value	[1]	$ 15,999,393
United States Treasury Obligations, Principal Value	[1]	$ 16,000,000
Investment Interest Rate	[2],[3]	0.04%
Investment Maturity Date	[3]	Aug. 05, 2021
U.S. Treasury Bills, 0.050% due October 7, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	13.80%
United States Treasury Obligations, Value	[1]	$ 16,998,033
United States Treasury Obligations, Principal Value	[1]	$ 17,000,000
Investment Interest Rate	[1],[3]	0.05%
Investment Maturity Date	[1],[3]	Oct. 07, 2021
U.S. Treasury Bills, 0.090% due January 27, 2022 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	2.43%
United States Treasury Obligations, Value	[1]	$ 2,999,169
United States Treasury Obligations, Principal Value	[1]	$ 3,000,000
Investment Interest Rate	[1],[3]	0.09%
Investment Maturity Date	[1],[3]	Jan. 27, 2022
United States Treasury Obligations [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		29.22%		38.76%	[3]
United States Treasury Obligations, Value		$ 35,996,595		$ 54,989,124	[3]
Investments in Securities, Cost		35,996,787		54,986,091
Restricted for maintenance margin		$ 35,994,100		$ 39,994,000
Exchange Traded Funds
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[4]	14.15%		12.29%
Affiliated investments, at value (cost $86,591,510 and $86,092,194, respectively)	[4]	$ 17,435,550		$ 17,435,550
Affiliated Investments, Shares	[4]	165,000		165,000
Exchange Traded Funds | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Affiliated investments, at value (cost $86,591,510 and $86,092,194, respectively)		$ 17,435,550		$ 17,435,550
Investments in Securities, Cost		$ 17,486,475		$ 17,486,475
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity		56.09%	[5],[6]	48.35%	[7]
Affiliated investments, at value (cost $86,591,510 and $86,092,194, respectively)		$ 69,105,035	[5],[6]	$ 68,605,719	[7]
Affiliated Investments, Shares		69,105,035	[5],[6]	68,605,719	[7]
Investment Interest Rate	[4]	0.03%	[6]	0.03%
Investments in Securities, Cost	[4]	$ 69,105,035	[6]	$ 68,605,719
U.S. Treasury Bills, 0.090% due June 10, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			5.64%
United States Treasury Obligations, Value	[3]			$ 7,997,462
United States Treasury Obligations, Principal Value	[3]			$ 8,000,000
Investment Interest Rate	[3],[8]			0.09%
Investment Maturity Date	[3],[8]			Jun. 10, 2021
U.S. Treasury Bills, 0.140% due October 7, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			4.93%
United States Treasury Obligations, Value	[3]			$ 6,995,707
United States Treasury Obligations, Principal Value	[3]			$ 7,000,000
Investment Interest Rate				0.14%
Investment Maturity Date				Oct. 07, 2021
U.S. Treasury Bills, 0.085% due February 25, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[3],[8]			14.10%
United States Treasury Obligations, Value	[3],[8]			$ 19,998,339
United States Treasury Obligations, Principal Value	[3],[8]			$ 20,000,000
Investment Interest Rate	[3]			0.085%
Investment Maturity Date	[3]			Feb. 25, 2021
U.S. Treasury Bills, 0.080% due March 11, 2021 [Member]
Schedule of Investments [Line Items]
Percentage of Shareholders' Equity	[8]			14.09%
United States Treasury Obligations, Value	[8]			$ 19,997,616
United States Treasury Obligations, Principal Value	[8]			$ 20,000,000
Investment Interest Rate	[3]			0.08%
Investment Maturity Date	[3]			Mar. 11, 2021

[1] United States Treasury Obligations of $35,994,100 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[2] Security may be traded on a discount basis. The interest rate shown represents the discount rate at the most recent auction date of the security prior to period end.

[3] Security may be traded on a discount basis. The interest rate shown represents the discount rate at the most recent auction date of the security prior to period end.

[4] Affiliated issuer. The issuer and/or the Fund is a wholly-owned subsidiary of Invesco Ltd., or is affiliated by having an investment adviser that is under common control of Invesco Ltd. See Note 8.

[5] Affiliated issuer. The issuer and/or the Fund is a wholly-owned subsidiary of Invesco Ltd., or is affiliated by having an investment adviser that is under common control of Invesco Ltd. See Note 8.

[6] The rate shown is the 7-day SEC standardized yield as of June 30, 2021.

[7] Affiliated issuer. The issuer and/or the Fund is a wholly-owned subsidiary of Invesco Ltd., or is affiliated by having an investment adviser that is under common control of Invesco Ltd. See Note 8.

[8] United States Treasury Obligations of $39,994,000 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.