v3.26.3
Schedules of Investments (Unaudited) - Investments (Details) - USD ($)
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Total U.S. Treasury bills and notes [1],[2] $ 1,017,450,044     $ 1,093,235,756        
Other Assets, Less Liabilities 9,958,297     (11,561,055)        
Net Assets – 100.00% 1,027,408,341 $ 839,284,870 $ 997,414,489 1,081,674,701 $ 994,070,222 $ 959,404,265 $ 1,053,139,808 $ 967,549,530
United States Treasury Bills 3.71% – 3.76% due 10/06/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 81,004,000              
U.S. Treasury bills and notes, fair value [1],[2] 80,961,660              
United States Treasury Bills 3.92% – 3.94% due 1/02/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       66,900,000        
U.S. Treasury bills and notes, fair value [1],[2]       66,900,000        
United States Treasury Bills 3.75% – 3.79% due 10/08/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 68,594,000              
U.S. Treasury bills and notes, fair value [1],[2] 68,543,392              
United States Treasury Bills 3.92% due 1/06/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       34,200,000        
U.S. Treasury bills and notes, fair value [1],[2]       34,186,871        
United States Treasury Bills 3.88% – 3.94% due 1/08/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       68,500,000        
U.S. Treasury bills and notes, fair value [1],[2]       68,460,347        
United States Treasury Bills 3.71% – 3.79% due 10/13/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 95,585,000              
U.S. Treasury bills and notes, fair value [1],[2] 95,463,709              
United States Treasury Bills 3.91% – 3.92% due 1/13/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       67,750,000        
U.S. Treasury bills and notes, fair value [1],[2]       67,677,470        
United States Treasury Bills 3.75% – 3.76% due 10/15/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 40,720,000              
U.S. Treasury bills and notes, fair value [1],[2] 40,659,635              
United States Treasury Bills 3.57% – 3.95% due 1/15/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       11,150,000        
U.S. Treasury bills and notes, fair value [1],[2]       11,135,749        
United States Treasury Bills 3.72% – 3.84% due 10/20/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 70,149,000              
U.S. Treasury bills and notes, fair value [1],[2] 70,007,149              
United States Treasury Bills 3.89% – 3.94% due 1/20/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       56,200,000        
U.S. Treasury bills and notes, fair value [1],[2]       56,100,686        
United States Treasury Bills 3.87% due 10/22/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 60,961,000              
U.S. Treasury bills and notes, fair value [1],[2] 60,824,533              
United States Treasury Bills 3.79% – 3.81% due 10/27/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 51,879,000              
U.S. Treasury bills and notes, fair value [1],[2] 51,735,249              
United States Treasury Bills 3.58% – 3.86% due 1/22/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       49,200,000        
U.S. Treasury bills and notes, fair value [1],[2]       49,102,876        
United States Treasury Bills 3.80% – 3.81% due 11/03/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 113,000,000              
U.S. Treasury bills and notes, fair value [1],[2] 112,596,739              
United States Treasury Bills 3.86% – 3.89% due 1/27/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       42,800,000        
U.S. Treasury bills and notes, fair value [1],[2]       42,695,099        
United States Treasury Bills 3.79% – 3.82% due 11/05/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 54,276,000              
U.S. Treasury bills and notes, fair value [1],[2] 54,069,888              
United States Treasury Bills 3.61% – 3.86% due 1/29/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       55,500,000        
U.S. Treasury bills and notes, fair value [1],[2]       55,353,436        
United States Treasury Bills 3.93% due 11/10/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 26,500,000              
U.S. Treasury bills and notes, fair value [1],[2] 26,384,529              
United States Treasury Bills 3.87% due 2/05/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       40,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       39,866,217        
United States Treasury Bills 3.79% due 11/12/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 40,000,000              
U.S. Treasury bills and notes, fair value [1],[2] 39,815,768              
United States Treasury Bills 3.64% – 3.67% due 2/10/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       48,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       47,815,993        
United States Treasury Bills 3.99% – 4.01% due 11/17/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 39,228,000              
U.S. Treasury bills and notes, fair value [1],[2] 39,026,081              
United States Treasury Bills 3.63% – 3.89% due 2/12/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       70,500,000        
U.S. Treasury bills and notes, fair value [1],[2]       70,211,804        
United States Treasury Bills 3.77% – 3.79% due 11/19/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 45,757,000              
U.S. Treasury bills and notes, fair value [1],[2] 45,510,110              
United States Treasury Bills 3.79% due 2/17/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       36,400,000        
U.S. Treasury bills and notes, fair value [1],[2]       36,235,646        
United States Treasury Bills 3.78% – 3.99% due 11/27/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 47,339,000              
U.S. Treasury bills and notes, fair value [1],[2] 47,039,013              
United States Treasury Bills 3.82% due 2/19/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       45,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       44,786,195        
United States Treasury Bills 3.81% due 2/24/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       50,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       49,739,917        
United States Treasury Bills 3.83% due 12/03/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 25,000,000              
U.S. Treasury bills and notes, fair value [1],[2] 24,825,508              
United States Treasury Bills 3.75% – 3.81% due 2/26/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       46,100,000        
U.S. Treasury bills and notes, fair value [1],[2]       45,847,244        
United States Treasury Bills 3.93% – 4.09% due 12/10/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 35,641,000              
U.S. Treasury bills and notes, fair value [1],[2] 35,366,107              
United States Treasury Bills 3.69% – 3.71% due 3/05/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       48,600,000        
U.S. Treasury bills and notes, fair value [1],[2]       48,304,152        
United States Treasury Bills 4.06% due 12/17/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 25,000,000              
U.S. Treasury bills and notes, fair value [1],[2] 24,787,448              
United States Treasury Bills 4.10% due 12/24/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 23,379,000              
U.S. Treasury bills and notes, fair value [1],[2] 23,162,078              
United States Treasury Bills 3.69% – 3.82% due 3/10/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       72,800,000        
U.S. Treasury bills and notes, fair value [1],[2]       72,328,753        
United States Treasury Bills 4.01% – 4.14% due 1/05/27 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 50,000,000              
U.S. Treasury bills and notes, fair value [1],[2] 49,460,786              
United States Treasury Bills 3.66% due 3/12/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       74,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       73,497,006        
United States Treasury Bills 4.18% due 1/19/27 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 25,000,000              
U.S. Treasury bills and notes, fair value [1],[2] 24,688,618              
United States Treasury Bills 3.74% due 3/17/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       35,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       34,748,257        
United States Treasury Bills 4.25% due 1/26/27 [Member]                
U.S. Treasury bills and notes, face amount [1],[2] 2,556,000              
U.S. Treasury bills and notes, fair value [1],[2] 2,522,044              
United States Treasury Bills 3.61% due 3/19/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       30,000,000        
U.S. Treasury bills and notes, fair value [1],[2]       29,776,646        
United States Treasury Bills 3.70% due 3/24/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       14,700,000        
U.S. Treasury bills and notes, fair value [1],[2]       14,583,440        
US Treasury Bill Securities [Member]                
Total U.S. Treasury bills and notes $ 1,017,450,044     1,093,235,756        
United States Treasury Bills 3.60% due 4/07/26 [Member]                
U.S. Treasury bills and notes, face amount [1],[2]       34,200,000        
U.S. Treasury bills and notes, fair value [1],[2]       $ 33,881,952        
[1] A portion of the above U.S. Treasury bills are posted as margin for the Trust’s Index Futures positions as described in Note 2D.
[2] Rates shown are discount rates paid at the time of purchase.