Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)		Mar. 31, 2023		Dec. 31, 2022
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity		100.24%		99.01%
United States Treasury Obligations, Value		$ 40,842,041		$ 30,797,944
Affiliated investments, value		38,232,956		68,087,284
Investments in Securities, Value		79,074,997		98,885,228
Investments in Securities, cost		$ 79,059,816		$ 98,874,569
U.S. Treasury Bills, 4.050% due April 6, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	25.34%
United States Treasury Obligations, Value	[1]	$ 19,992,312
United States Treasury Obligations, Principal Value	[1]	$ 20,000,000
Investment Interest Rate	[1]	4.05%
Investment Maturity Date	[1]	Apr. 06, 2023
U.S. Treasury Bills, 4.680% due May 18, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1],[2]	12.60%
United States Treasury Obligations, Value	[1],[2]	$ 9,941,563
United States Treasury Obligations, Principal Value	[1],[2]	$ 10,000,000
Investment Interest Rate	[1],[2]	4.68%
Investment Maturity Date	[1],[2]	May 18, 2023
Restricted for maintenance margin		$ 4,971,000
U.S. Treasury Bills, 4.765% due June 8, 2023 [Member]
Schedule Of Investments [Line Items]
Percentage of Shareholders' Equity	[1]	13.83%
United States Treasury Obligations, Value	[1]	$ 10,908,166
United States Treasury Obligations, Principal Value	[1]	$ 11,000,000
Investment Interest Rate	[1]	4.765%
Investment Maturity Date	[1]	Jun. 08, 2023
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		51.77%	[1]	30.84%	[3]
United States Treasury Obligations, Value		$ 40,842,041	[1]	$ 30,797,944	[3]
Investments in Securities, cost		$ 40,826,860	[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		48.47%	[5],[6]	68.17%	[7],[8]
Affiliated investments, value		$ 38,232,956	[5],[6]	$ 68,087,284	[7],[8]
Shares		38,232,956	[5],[6]	68,087,284	[7],[8]
Investment Interest Rate		4.73%	[5],[6]	4.22%	[7],[8]
Investments in Securities, cost		$ 38,232,956	[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 $4,971,000 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 March 31, 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.