Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($) | Sep. 30, 2021 | Dec. 31, 2020 |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 98.16% | | 99.43% | |
United States Treasury Obligations, Value | | $ 35,997,744 | | $ 42,992,257 | |
Affiliated Investments, Value | | 38,197,496 | | 61,205,704 | |
Investments in Securities, Value | | 74,195,240 | | 104,197,961 | |
Investments in Securities, Cost | | $ 74,218,184 | | $ 104,247,241 | |
Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 50.54% | | 58.41% | |
Affiliated Investments, Value | | $ 38,197,496 | | $ 61,205,704 | |
Investments in Securities, Cost | | $ 38,219,896 | | $ 61,256,629 | |
U.S. Treasury Bills, 0.050% due October 7, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[2] | 9.26% | | | |
United States Treasury Obligations, Value | [1],[2] | $ 6,999,969 | | | |
United States Treasury Obligations, Principal Value | [1],[2] | $ 7,000,000 | | | |
Investment Interest Rate | [3] | 0.05% | | | |
Investment Maturity Date | [3] | Oct. 7, 2021 | | | |
U.S. Treasury Bills, 0.050% due October 21, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[2] | 13.23% | | | |
United States Treasury Obligations, Value | [1],[2] | $ 9,999,602 | | | |
United States Treasury Obligations, Principal Value | [1],[2] | $ 10,000,000 | | | |
Investment Interest Rate | [3] | 0.05% | | | |
Investment Maturity Date | [3] | Oct. 21, 2021 | | | |
Restricted for maintenance margin | [3] | $ 35,998,288 | | | |
U.S. Treasury Bills, 0.050% due November 4, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[2] | 7.93% | | | |
United States Treasury Obligations, Value | [1],[2] | $ 5,999,684 | | | |
United States Treasury Obligations, Principal Value | [1],[2] | $ 6,000,000 | | | |
Investment Interest Rate | [3] | 0.05% | | | |
Investment Maturity Date | [3] | Nov. 4, 2021 | | | |
U.S. Treasury Bills, 0.045% due December 9, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 3.97% | | | |
United States Treasury Obligations, Value | [1] | $ 2,999,883 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 3,000,000 | | | |
Investment Interest Rate | | 0.045% | | | |
Investment Maturity Date | | Dec. 9, 2021 | | | |
U.S. Treasury Bills, 0.050% due January 27, 2022 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[2] | 9.26% | | | |
United States Treasury Obligations, Value | [1],[2] | $ 6,999,139 | | | |
United States Treasury Obligations, Principal Value | [1],[2] | $ 7,000,000 | | | |
Investment Interest Rate | [2] | 0.05% | | | |
Investment Maturity Date | [2] | Jan. 27, 2022 | | | |
U.S. Treasury Bills, 0.050% due March 10, 2022 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 3.97% | | | |
United States Treasury Obligations, Value | [1] | $ 2,999,467 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 3,000,000 | | | |
Investment Interest Rate | | 0.05% | | | |
Investment Maturity Date | | Mar. 10, 2022 | | | |
United States Treasury Obligations [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 47.62% | [1] | 41.02% | [4] |
United States Treasury Obligations, Value | | $ 35,997,744 | [1] | $ 42,992,257 | [4] |
Investments in Securities, Cost | | $ 29,996,300 | | $ 42,990,612 | |
Exchange-Traded Fund - Invesco Treasury Collateral ETF [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [5] | 9.79% | | 16.64% | |
Affiliated Investments, Value | [5] | $ 7,396,200 | | $ 17,435,550 | |
Affiliated Investments | [5] | 70,000 | | 165,000 | |
Investments in Securities, Cost | [5] | $ 7,418,600 | | $ 17,486,475 | |
Money Market Mutual Fund [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Investment Interest Rate | [5] | 0.03% | [6] | 0.03% | [7] |
Investments in Securities, Cost | [5] | $ 30,801,296 | [6] | $ 43,770,154 | [7] |
Money Market Mutual Fund [Member] | Invesco Government & Agency Portfolio, Institutional Class [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [5] | 40.75% | [6] | 41.77% | [7] |
Affiliated Investments, Value | [5] | $ 30,801,296 | [6] | $ 43,770,154 | [7] |
Affiliated Investments | [5] | 30,801,296 | [6] | 43,770,154 | [7] |
U.S. Treasury Bills, 0.080% due March 11, 2021 | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [4],[8] | | | 12.40% | |
United States Treasury Obligations, Value | [4],[8] | | | $ 12,998,450 | |
United States Treasury Obligations, Principal Value | [4],[8] | | | $ 13,000,000 | |
Investment Interest Rate | [8] | | | 0.08% | |
Investment Maturity Date | [8] | | | Mar. 11, 2021 | |
U.S. Treasury Bills, 0.090% due April 8, 2021 | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [4],[8] | | | 9.54% | |
United States Treasury Obligations, Value | [4],[8] | | | $ 9,998,303 | |
United States Treasury Obligations, Principal Value | [4],[8] | | | $ 10,000,000 | |
Investment Interest Rate | [8] | | | 0.09% | |
Investment Maturity Date | [8] | | | Apr. 8, 2021 | |
U.S. Treasury Bills, 0.090% due April 22, 2021 | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [4],[8] | | | 9.54% | |
United States Treasury Obligations, Value | [4],[8] | | | $ 9,997,900 | |
United States Treasury Obligations, Principal Value | [4],[8] | | | $ 10,000,000 | |
Investment Interest Rate | [8] | | | 0.09% | |
Investment Maturity Date | [8] | | | Apr. 22, 2021 | |
U.S. Treasury Bills, 0.095% due April 29, 2021 | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [4],[8] | | | 9.54% | |
United States Treasury Obligations, Value | [4],[8] | | | $ 9,997,604 | |
United States Treasury Obligations, Principal Value | [4],[8] | | | $ 10,000,000 | |
Investment Interest Rate | [8] | | | 0.095% | |
Investment Maturity Date | [8] | | | Apr. 29, 2021 | |
Restricted for maintenance margin | [8] | | | $ 42,988,400 | |
| |
[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 $29,996,300 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |
[3] | United States Treasury Obligations of $29,996,300 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |
[4] | 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 | |
[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, 2021. | |
[7] | The rate shown is the 7-day SEC standardized yield as of December 31, 2020. | |
[8] | United States Treasury Obligations of $42,988,400 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |