Schedule of Investments (Unaudited) - Treasury Bills and Affiliated Investments - USD ($) | Mar. 31, 2021 | Dec. 31, 2020 |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 101.76% | | 99.04% | |
United States Treasury Obligations, Value | | $ 208,985,418 | | $ 164,984,129 | |
Affiliated Investments, Value | | 285,450,082 | | 264,713,980 | |
Investments in Securities, Value | | 494,435,500 | | 429,698,109 | |
Investments in Securities, Cost | | $ 494,517,297 | | $ 429,790,653 | |
Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 58.75% | | 61.01% | |
Affiliated Investments, Value | | $ 285,450,082 | | $ 264,713,980 | |
Affiliated Investments, Cost | | $ 285,543,439 | | $ 264,815,849 | |
U.S. Treasury Bills, 0.070% due August 5, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 32.72% | | | |
United States Treasury Obligations, Value | [1] | $ 158,991,652 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 159,000,000 | | | |
Investment Interest Rate | [1] | 0.07% | | | |
Investment Maturity Date | [1] | Aug. 5, 2021 | | | |
Restricted for maintenance margin | | $ 93,986,600 | | | |
U.S. Treasury Bills, 0.035% due October 7, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [1] | 10.29% | | | |
United States Treasury Obligations, Value | [1] | $ 49,993,766 | | | |
United States Treasury Obligations, Principal Value | [1] | $ 50,000,000 | | | |
Investment Interest Rate | [1] | 0.035% | | | |
Investment Maturity Date | [1] | Oct. 7, 2021 | | | |
United States Treasury Obligations [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 43.01% | | 38.03% | |
United States Treasury Obligations, Value | | $ 208,985,418 | | $ 164,984,129 | |
Investments in Securities, Cost | | $ 208,973,858 | | $ 164,974,804 | |
Exchange-Traded Fund - PowerShares Treasury Collateral Portfolio [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [2] | 12.34% | | 13.82% | |
Affiliated Investments, Value | [2] | $ 59,976,237 | | $ 59,967,725 | |
Affiliated Investments, Shares | [2] | 567,500 | | 567,500 | |
Affiliated Investments, Cost | [2] | $ 60,069,594 | | $ 60,069,594 | |
Money Market Mutual Fund - Invesco Government and Agency Portfolio - Institutional Class [Member] | Affiliated Investments [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | 46.41% | [2],[3] | 47.19% | |
Affiliated Investments, Value | | $ 225,473,845 | [2],[3] | $ 204,746,255 | |
Affiliated Investments, Shares | | 225,473,845 | [2],[3] | 204,746,255 | |
Investment Interest Rate | [2] | 0.03% | [3] | 0.03% | [4] |
Affiliated Investments, Cost | [2] | $ 225,473,845 | [3] | $ 204,746,255 | [4] |
U.S. Treasury Bills, 0.080% due March 11, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | | | | 13.83% | |
United States Treasury Obligations, Value | | | | $ 59,992,850 | |
United States Treasury Obligations, Principal Value | | | | $ 60,000,000 | |
Investment Interest Rate | | | | 0.08% | |
Investment Maturity Date | | | | Mar. 11, 2021 | |
U.S. Treasury Bills, 0.085% due February 25, 2021 [Member] | | | | | |
Schedule of Investments [Line Items] | | | | | |
Percentage of Shareholders' Equity | [5] | | | 24.20% | |
United States Treasury Obligations, Value | [5] | | | $ 104,991,279 | |
United States Treasury Obligations, Principal Value | [5] | | | $ 105,000,000 | |
Investment Interest Rate | [5] | | | 0.085% | |
Investment Maturity Date | [5] | | | Feb. 25, 2021 | |
Restricted for maintenance margin | | | | $ 104,989,500 | |
| |
[1] | United States Treasury Obligations of $93,986,600 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts. | |
[2] | 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. | |
[3] | The rate shown is the 7-day SEC standardized yield as of March 31, 2021. | |
[4] | The rate shown is the 7-day SEC standardized yield as of December 31, 2020. | |
[5] | United States Treasury Obligations of $104,989,500 are on deposit with the Commodity Broker and held as maintenance margin for open futures | |