Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($) | Sep. 30, 2020 | Dec. 31, 2019 |
Schedule of Investments [Line Items] | | | | |
Investment Interest Rate | [1] | | 1.52% | |
Investment Maturity Date | [1] | | Feb. 6, 2020 | |
Investments in Securities, Cost | | $ 27,747,164 | $ 15,417,394 | |
Restricted for maintenance margin | [1] | | $ 2,995,500 | |
Percentage of Shareholders' Equity | | 103.98% | 100.16% | |
United States Treasury Obligations, Value | | $ 14,997,595 | $ 10,984,118 | |
Affiliated Investments, Value | | 12,749,883 | 4,434,970 | |
Investments in Securities, Value | | $ 27,747,478 | 15,419,088 | |
U.S. Treasury Bills, 0.085% due November 12, 2020 [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Investment Interest Rate | [2],[3] | 0.085% | | |
Investment Maturity Date | [2],[3] | Nov. 12, 2020 | | |
Restricted for maintenance margin | [2],[3] | $ 8,998,400 | | |
Percentage of Shareholders' Equity | [2],[3] | 7.49% | | |
United States Treasury Obligations, Value | [2],[3] | $ 1,999,811 | | |
United States Treasury Obligations, Principal Value | [2],[3] | $ 2,000,000 | | |
U.S. Treasury Bills, 0.115% due December 10, 2020 [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Investment Interest Rate | [2],[3] | 0.115% | | |
Investment Maturity Date | [2],[3] | Dec. 10, 2020 | | |
Restricted for maintenance margin | [2],[3] | $ 8,998,400 | | |
Percentage of Shareholders' Equity | [2],[3] | 26.23% | | |
United States Treasury Obligations, Value | [2],[3] | $ 6,998,843 | | |
United States Treasury Obligations, Principal Value | [2],[3] | $ 7,000,000 | | |
U.S. Treasury Bills, 0.110% due December 17, 2020 [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Investment Interest Rate | [2] | 0.11% | | |
Investment Maturity Date | [2] | Dec. 17, 2020 | | |
Percentage of Shareholders' Equity | [2] | 22.48% | | |
United States Treasury Obligations, Value | [2] | $ 5,998,941 | | |
United States Treasury Obligations, Principal Value | [2] | 6,000,000 | | |
United States Treasury Obligations [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Investments in Securities, Cost | | $ 14,997,281 | $ 10,982,424 | [1] |
Percentage of Shareholders' Equity | | 56.20% | 71.35% | [1] |
United States Treasury Obligations, Value | | $ 14,997,595 | $ 10,984,118 | [1] |
Money Market Mutual Fund - Invesco Government & Agency Portfolio [Member] | Affiliated Investments [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Investment Interest Rate | [4],[5] | 0.02% | | |
Investments in Securities, Cost | [4],[5] | $ 12,749,883 | | |
Percentage of Shareholders' Equity | | 47.78% | | |
Affiliated Investments, Value | | $ 12,749,883 | | |
Affiliated Investments, Shares | | 12,749,883 | | |
Money Market Mutual Fund - Invesco Premier U.S. Government Money Portfolio - Institutional Class [Member] | Affiliated Investments [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Investment Interest Rate | [4],[6] | | 1.47% | |
Investments in Securities, Cost | [4],[6] | | $ 4,434,970 | |
Percentage of Shareholders' Equity | [4],[6] | | 28.81% | |
Affiliated Investments, Value | [4],[6] | | $ 4,434,970 | |
Affiliated Investments, Shares | [4],[6] | | 4,434,970 | |
U.S. Treasury Bills, 1.520% due February 6, 2020 [Member] | | | | |
Schedule of Investments [Line Items] | | | | |
Percentage of Shareholders' Equity | [1],[7] | | 71.35% | |
United States Treasury Obligations, Value | [1],[7] | | $ 10,984,118 | |
United States Treasury Obligations, Principal Value | [1],[7] | | $ 11,000,000 | |
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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] | 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] | United States Treasury Obligations of $8,998,400 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |
[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] | The rate shown is the 7-day SEC standardized yield as of September 30, 2020. | |
[6] | The rate shown is the 7-day SEC standardized yield as of December 31, 2019. | |
[7] | United States Treasury Obligations of $2,995,500 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |