Schedule of Investments - Treasury Bills and Affiliated Investments - USD ($) | Dec. 31, 2020 | Dec. 31, 2019 |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 99.35% | | 101.08% | |
United States Treasury Obligations, Value | | $ 19,993,340 | | $ 14,963,000 | |
Affiliated Investments, Value | | 38,268,976 | | 50,061,710 | |
Investments in Securities, Value | | 58,262,316 | | 65,024,710 | |
Investments in Securities, cost | | $ 58,232,948 | | $ 64,987,634 | |
Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 65.26% | | 77.82% | |
Affiliated Investments, Value | | $ 38,268,976 | | $ 50,061,710 | |
Affiliated investments, at cost | | $ 38,240,835 | | $ 50,030,279 | |
U.S. Treasury Bills, 0.080% due March 11, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[2] | 13.64% | | | |
United States Treasury Obligations, Value | [1],[2] | $ 7,999,047 | | | |
United States Treasury Obligations, Principal Value | [1],[2] | $ 8,000,000 | | | |
Investment Interest Rate | [1],[2] | 0.08% | | | |
Investment Maturity Date | [1],[2] | Mar. 11, 2021 | | | |
Restricted for maintenance margin | | $ 7,998,400 | | | |
U.S. Treasury Bills, 0.090% due June 10, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 8.52% | | | |
United States Treasury Obligations, Value | [1] | $ 4,998,414 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 5,000,000 | | | |
Investment Interest Rate | [1] | 0.09% | | | |
Investment Maturity Date | [1] | Jun. 10, 2021 | | | |
U.S. Treasury Bills, 0.140% due September 9, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 3.41% | | | |
United States Treasury Obligations, Value | [1] | $ 1,998,946 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 2,000,000 | | | |
Investment Interest Rate | [1] | 0.14% | | | |
Investment Maturity Date | [1] | Sep. 9, 2021 | | | |
U.S. Treasury Bills, 0.140% due October 7, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 8.52% | | | |
United States Treasury Obligations, Value | [1] | $ 4,996,933 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 5,000,000 | | | |
Investment Interest Rate | [1] | 0.14% | | | |
Investment Maturity Date | [1] | Oct. 7, 2021 | | | |
United States Treasury Obligations [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 34.09% | | 23.26% | |
United States Treasury Obligations, Value | [1] | $ 19,993,340 | | $ 14,963,000 | |
Investments in Securities, cost | | $ 19,992,113 | | $ 14,957,355 | |
Exchange-Traded Fund - Invesco Treasury Collateral ETF [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 17.16% | [3] | 31.14% | [4] |
Affiliated Investments, Value | | $ 10,059,784 | [3] | $ 20,031,492 | [4] |
Affiliated Investments, Shares | | 95,200 | [3] | 189,800 | [4] |
Affiliated investments, at cost | [4] | $ 10,031,643 | | $ 20,000,061 | |
Money Market Mutual Fund - Invesco Government & Agency Portfolio, Institutional Class [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [3],[5] | 48.10% | | | |
Affiliated Investments, Value | [3],[5] | $ 28,209,192 | | | |
Affiliated Investments, Shares | [3],[5] | 28,209,192 | | | |
Investment Interest Rate | [3],[5] | 0.03% | | | |
Affiliated investments, at cost | [3],[5] | $ 28,209,192 | | | |
U.S. Treasury Bills, 1.520% due February 6, 2020 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | | | 4.66% | |
United States Treasury Obligations, Value | [1] | | | $ 2,995,669 | |
United States Treasury Obligations, Principal Value | [1] | | | $ 3,000,000 | |
Investment Interest Rate | [1] | | | 1.52% | |
Investment Maturity Date | [1] | | | Feb. 6, 2020 | |
U.S. Treasury Bills, 1.560% due March 5, 2020 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1],[6] | | | 17.05% | |
United States Treasury Obligations, Value | [1],[6] | | | $ 10,971,173 | |
United States Treasury Obligations, Principal Value | [1],[6] | | | $ 11,000,000 | |
Investment Interest Rate | [1],[6] | | | 1.56% | |
Investment Maturity Date | [1],[6] | | | Mar. 5, 2020 | |
Restricted for maintenance margin | | | | $ 8,178,680 | |
U.S. Treasury Bills, 1.520% due April 2, 2020 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | | | 1.55% | |
United States Treasury Obligations, Value | [1] | | | $ 996,158 | |
United States Treasury Obligations, Principal Value | [1] | | | $ 1,000,000 | |
Investment Interest Rate | [1] | | | 1.52% | |
Investment Maturity Date | [1] | | | Apr. 2, 2020 | |
Money Market Mutual Fund - Invesco Premier U.S. Government Money Portfolio - Institutional Class [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [4],[7] | | | 46.68% | |
Affiliated Investments, Value | [4],[7] | | | $ 30,030,218 | |
Affiliated Investments, Shares | [4],[7] | | | 30,030,218 | |
Investment Interest Rate | [4],[7] | | | 1.47% | |
Affiliated investments, at cost | [4],[7] | | | $ 30,030,218 | |
| |
[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 $7,998,400 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 Invesco Ltd. See Note 8. | |
[4] | Affiliated company. 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 December 31, 2020. | |
[6] | United States Treasury Obligations of $8,178,680 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |
[7] | The rate shown is the 7-day SEC standardized yield as of December 31, 2019. | |