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 | | 100.51% | | 100.03% | |
United States Treasury Obligations, Value | | $ 43,997,235 | | $ 39,984,877 | |
Affiliated investments, value | | 36,507,439 | | 53,676,948 | |
Investments in Securities, Value | | 80,504,674 | | 93,661,825 | |
Investments in Securities, cost | | $ 80,502,277 | | $ 93,658,656 | |
U.S. Treasury Bills, 0.040% due August 5, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 24.97% | | | |
United States Treasury Obligations, Value | [1] | $ 19,999,241 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 20,000,000 | | | |
Investment Interest Rate | | 0.04% | | | |
Investment Maturity Date | | Aug. 5, 2021 | | | |
U.S. Treasury Bills, 0.025% due September 9, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[2] | 27.46% | | | |
United States Treasury Obligations, Value | [1],[2] | $ 21,998,225 | | | |
United States Treasury Obligations, Principal Value | [1],[2] | $ 22,000,000 | | | |
Investment Interest Rate | | 0.025% | | | |
Investment Maturity Date | | Sep. 9, 2021 | | | |
Restricted for maintenance margin | | $ 3,999,600 | | | |
U.S. Treasury Bills, 0.050% due October 7, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 2.50% | | | |
United States Treasury Obligations, Value | [1] | $ 1,999,769 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 2,000,000 | | | |
Investment Interest Rate | | 0.05% | | | |
Investment Maturity Date | | Oct. 7, 2021 | | | |
United State Treasury Obligation [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 54.93% | | 42.70% | |
United States Treasury Obligations, Value | [1] | $ 43,997,235 | | $ 39,984,877 | |
Investments in Securities, cost | | $ 43,994,838 | | $ 39,981,708 | |
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 45.58% | [3],[4] | 57.33% | [5],[6] |
Affiliated investments, value | | $ 36,507,439 | [3],[4] | $ 53,676,948 | [5],[6] |
Shares | | 36,507,439 | [3],[4] | 53,676,948 | [5],[6] |
Investment Interest Rate | | 0.03% | | 0.03% | |
Investments in Securities, cost | | $ 36,507,439 | | $ 53,676,948 | |
U.S. Treasury Bills, 0.080% due March 11, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | | | 14.95% | |
United States Treasury Obligations, Value | [1] | | | $ 13,998,332 | |
United States Treasury Obligations, Principal Value | [1] | | | $ 14,000,000 | |
Investment Interest Rate | | | | 0.08% | |
Investment Maturity Date | | | | Mar. 11, 2021 | |
U.S. Treasury Bills, 0.090% due June 10, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[7] | | | 2.14% | |
United States Treasury Obligations, Value | [1],[7] | | | $ 1,999,366 | |
United States Treasury Obligations, Principal Value | [1],[7] | | | $ 2,000,000 | |
Investment Interest Rate | | | | 0.09% | |
Investment Maturity Date | | | | Jun. 10, 2021 | |
Restricted for maintenance margin | | | | $ 3,999,200 | |
U.S. Treasury Bills, 0.140% due September 9, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | | | 23.48% | |
United States Treasury Obligations, Value | [1] | | | $ 21,988,406 | |
United States Treasury Obligations, Principal Value | [1] | | | $ 22,000,000 | |
Investment Interest Rate | | | | 0.14% | |
Investment Maturity Date | | | | Sep. 9, 2021 | |
U.S. Treasury Bills, 0.140% due October 7, 2021 [Member] | | | | | |
Schedule Of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | | | 2.13% | |
United States Treasury Obligations, Value | [1] | | | $ 1,998,773 | |
United States Treasury Obligations, Principal Value | [1] | | | $ 2,000,000 | |
Investment Interest Rate | | | | 0.14% | |
Investment Maturity Date | | | | Oct. 7, 2021 | |
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[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 $3,999,600 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts | |
[3] | 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 | |
[4] | The rate shown is the 7-day SEC standardized yield as of June 30, 2021. | |
[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 December 31, 2020 | |
[7] | United States Treasury Obligations of $ 3,999,200 | |