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Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity 96.60% 100.16%
United States Treasury Obligations, Value $ 159,768,577 $ 92,006,259
Affiliated Investments, Value 780,011,295 626,458,758
Investments in Securities, Value 939,779,872 718,465,017
Investments in Securities, Cost 939,895,884 718,493,794
Affiliated Investments, at Cost 780,076,997 626,489,060
Restricted for maintenance margin $ 44,861,500 $ 27,997,200
Affiliated Investments [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity 80.18% 87.33%
Affiliated Investments, Value $ 780,011,295 $ 626,458,758
Affiliated Investments, at Cost $ 780,076,997 $ 626,489,060
U.S. Treasury Bills, 0.170% due April 21, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1] 3.60%  
United States Treasury Obligations, Value [1] $ 34,997,618  
United States Treasury Obligations, Principal Value [1] $ 35,000,000  
Investment Interest Rate [1] 0.17%  
Investment Maturity Date [1] Apr. 21, 2022  
U.S. Treasury Bills, 0.440% due May 19, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1] 2.57%  
United States Treasury Obligations, Value [1] $ 24,992,000  
United States Treasury Obligations, Principal Value [1] $ 25,000,000  
Investment Interest Rate [1] 0.44%  
Investment Maturity Date [1] May 19, 2022  
U.S. Treasury Bills, 0.380% due June 9, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1] 2.05%  
United States Treasury Obligations, Value [1] $ 19,985,702  
United States Treasury Obligations, Principal Value [1] $ 20,000,000  
Investment Interest Rate [1] 0.38%  
Investment Maturity Date [1] Jun. 09, 2022  
U.S. Treasury Bills, 0.365% due July 21, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1] 3.59%  
United States Treasury Obligations, Value [1] $ 34,928,640  
United States Treasury Obligations, Principal Value [1] $ 35,000,000  
Investment Interest Rate [1] 0.365%  
Investment Maturity Date [1] Jul. 21, 2022  
U.S. Treasury Bills, 0.500% due August 4, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1],[2] 2.05%  
United States Treasury Obligations, Value [1],[2] $ 19,944,896  
United States Treasury Obligations, Principal Value [1],[2] $ 20,000,000  
Investment Interest Rate [1],[2] 0.50%  
Investment Maturity Date [1],[2] Aug. 04, 2022  
U.S. Treasury Bills, 0.770% due August 18, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1],[2] 2.56%  
United States Treasury Obligations, Value [1],[2] $ 24,919,721  
United States Treasury Obligations, Principal Value [1],[2] $ 25,000,000  
Investment Interest Rate [1],[2] 0.77%  
Investment Maturity Date [1],[2] Aug. 18, 2022  
United States Treasury Obligations [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1] 16.42% 12.83%
United States Treasury Obligations, Value [1] $ 159,768,577 $ 92,006,259
Investments in Securities, Cost 159,818,887 [1] 92,004,734
Exchange-Traded Fund [Member]    
Schedule of Investments [Line Items]    
Affiliated Investments, at Cost [3] $ 49,885,302 $ 49,885,302
Exchange-Traded Fund [Member] | Affiliated Investments [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [3] 5.12% 6.95%
Affiliated Investments, Value [3] $ 49,819,600 $ 49,855,000
Affiliated Investments, Shares [3] 472,000 472,000
Money Market Mutual Fund - Invesco Government & Agency Portfolio, Institutional Class [Member]    
Schedule of Investments [Line Items]    
Investment Interest Rate [3] 0.25% [4] 0.03% [5]
Investments in Securities, Cost [3] $ 730,191,695 [4] $ 576,603,758 [5]
Money Market Mutual Fund - Invesco Government & Agency Portfolio, Institutional Class [Member] | Affiliated Investments [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [3],[4] 75.06%  
Affiliated Investments, Value $ 730,191,695 [3],[4] $ 576,603,758
Affiliated Investments, Shares [3],[4] 730,191,695  
U.S. Treasury Bills, 0.040% due January 6, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1]   3.76%
United States Treasury Obligations, Value [1]   $ 27,000,002
United States Treasury Obligations, Principal Value [1]   $ 27,000,000
Investment Interest Rate [1]   0.04%
Investment Maturity Date [1]   Jan. 06, 2022
U.S. Treasury Bills, 0.055% due January 20, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1]   2.79%
United States Treasury Obligations, Value [1]   $ 19,999,929
United States Treasury Obligations, Principal Value [1]   $ 20,000,000
Investment Interest Rate [1]   0.055%
Investment Maturity Date [1]   Jan. 20, 2022
U.S. Treasury Bills, 0.050% due February 3, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1],[6]   3.91%
United States Treasury Obligations, Value [1],[6]   $ 28,007,497
United States Treasury Obligations, Principal Value [1],[6]   $ 28,008,100
Investment Interest Rate [1],[6]   0.05%
Investment Maturity Date [1],[6]   Feb. 03, 2022
U.S. Treasury Bills, 0.070% due March 10, 2022 [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [1],[6]   2.37%
United States Treasury Obligations, Value [1],[6]   $ 16,998,831
United States Treasury Obligations, Principal Value [1],[6]   $ 17,000,000
Investment Interest Rate [1],[6]   0.07%
Investment Maturity Date [1],[6]   Mar. 10, 2022
Money Market Funds | Affiliated Investments [Member]    
Schedule of Investments [Line Items]    
Percentage of Shareholders' Equity [3],[5]   80.38%
Affiliated Investments, Value [3],[5]   $ 576,603,758
Affiliated Investments, Shares [3],[5]   576,603,758
[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 $44,861,500 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 March 31, 2022.
[5] The rate shown is the 7-day SEC standardized yield as of December 31, 2021.
[6] United States Treasury Obligations of $27,997,200 are on deposit with the Commodity Broker and held as maintenance margin for open futures contracts.