Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)		Sep. 30, 2023		Dec. 31, 2022
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		99.72%		99.01%
United States Treasury Obligations, Value		$ 34,762,791		$ 30,797,944
Total Investments in Securities		63,237,769		98,885,228
Investments in Securities, cost		63,234,943		98,874,569
Affiliated Investments [Member]
Schedule Of Investments [Line Items]
Affiliated investments, value		$ 28,474,978		$ 68,087,284
U.S. Treasury Bills, 5.280% due October 5, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	23.64%
United States Treasury Obligations, Value	[1]	$ 14,993,419
United States Treasury Obligations, Principal Value	[1]	$ 15,000,000
Investment Interest Rate	[1]	5.28%
Investment Maturity Date	[1]	Oct. 05, 2023
U.S. Treasury Bills, 5.330% due November 16, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	15.67%
United States Treasury Obligations, Value	[2],[3]	$ 9,933,875
United States Treasury Obligations, Principal Value	[2],[3]	$ 10,000,000
Investment Interest Rate	[1],[2]	5.33%
Investment Maturity Date	[1],[2]	Nov. 16, 2023
Restricted for maintenance margin		$ 4,966,500
U.S. Treasury Bills, 5.315% due December 7, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3]	7.81%
United States Treasury Obligations, Value	[3]	$ 4,951,325
United States Treasury Obligations, Principal Value	[3]	$ 5,000,000
Investment Interest Rate	[1]	5.315%
Investment Maturity Date	[1]	Dec. 07, 2023
U.S. Treasury Bills, 5.300% due March 7, 2024 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	7.70%
United States Treasury Obligations, Value	[1]	$ 4,884,172
United States Treasury Obligations, Principal Value	[1]	$ 5,000,000
Investment Interest Rate	[1]	5.30%
Investment Maturity Date	[1]	Mar. 07, 2024
U.S. Treasury Bills, 4.155% due February 16, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			9.96%
United States Treasury Obligations, Value	[3]			$ 9,950,332
United States Treasury Obligations, Principal Value	[3]			$ 10,000,000
Investment Interest Rate	[3]			4.155%
Investment Maturity Date	[3]			Feb. 16, 2023
U.S. Treasury Bills, 4.285% due March 2, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3],[4]			9.95%
United States Treasury Obligations, Value	[3],[4]			$ 9,931,788
United States Treasury Obligations, Principal Value	[3],[4]			$ 10,000,000
Investment Interest Rate	[3],[4]			4.285%
Investment Maturity Date	[3],[4]			Mar. 02, 2023
Restricted for maintenance margin				$ 4,965,500
U.S. Treasury Bills, 4.270% due March 9, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[3]			10.93%
United States Treasury Obligations, Value	[3]			$ 10,915,824
United States Treasury Obligations, Principal Value	[3]			$ 11,000,000
Investment Interest Rate	[3]			4.27%
Investment Maturity Date	[3]			Mar. 09, 2023
United State Treasury Obligation [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		54.82%	[1]	30.84%	[3]
United States Treasury Obligations, Value		$ 34,762,791	[1]	$ 30,797,944	[3]
Investments in Securities, cost		$ 34,759,965	[1]	$ 30,787,285	[3]
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		44.90%	[5],[6]	68.17%	[7],[8]
Shares		28,474,978	[5],[6]	68,087,284	[7],[8]
Affiliated investments, value		$ 28,474,978	[5],[6]	$ 68,087,284	[7],[8]
Investment Interest Rate		5.25%	[5],[6]	4.22%	[7],[8]
Investments in Securities, cost		$ 28,474,978	[5],[6]	$ 68,087,284	[7],[8]

[1] 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

[2] United States Treasury Obligations of $4,966,500 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts

[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] United States Treasury Obligations of $4,965,500 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.

[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 September 30, 2023.

[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] The rate shown is the 7-day SEC standardized yield as of December 31, 2022.