| Income Statement | 2026-03-31 | 2025-12-31 | 2025-09-30 | |
|---|---|---|---|---|
| Realized gain (loss) on closed commodity futures contracts-United States Commodity Index Fund | NaN | NaN | 8,806,830 | |
| Change in unrealized gain (loss) on open commodity futures contracts-United States Commodity Index Fund | NaN | NaN | 4,599,878 | |
| Dividend income-United States Commodity Index Fund | NaN | NaN | 1,822,837 | |
| Interest income-United States Commodity Index Fund | NaN | NaN | 873,633 | |
| Etf transaction fees-United States Commodity Index Fund | NaN | NaN | 1,400 | |
| Realized gain (loss) on closed commodity futures contracts-United States Copper Index Fund | NaN | NaN | -3,556,887 | |
| Change in unrealized gain (loss) on open commodity futures contracts-United States Copper Index Fund | NaN | NaN | -2,627,899 | |
| Dividend income-United States Copper Index Fund | NaN | NaN | 1,354,017 | |
| Interest income-United States Copper Index Fund | NaN | NaN | 1,043,410 | |
| Etf transaction fees-United States Copper Index Fund | NaN | NaN | 11,550 | |
| Realized gain (loss) on closed commodity futures contracts-United States Commodity Index Funds Trust | NaN | NaN | 5,249,943 | |
| Change in unrealized gain (loss) on open commodity futures contracts-United States Commodity Index Funds Trust | NaN | NaN | 1,971,979 | |
| Dividend income-United States Commodity Index Funds Trust | NaN | NaN | 3,176,854 | |
| Interest income-United States Commodity Index Funds Trust | NaN | NaN | 1,917,043 | |
| Etf transaction fees-United States Commodity Index Funds Trust | NaN | NaN | 12,950 | |
| Total income (gain)-United States Commodity Index Fund | 65,494,114 | 49,443,942* | 16,104,578 | |
| Total income (loss)-United States Copper Index Fund | -30,764,529 | NaN | -3,775,809 | |
| Realized gain (loss) on closed commodity futures contracts | NaN | NaN | 5,249,943 | |
| Change in unrealized gain (loss) on open commodity futures contracts | NaN | NaN | 1,971,979 | |
| Management fees (note 4) | NaN | 413,147.75* | NaN | |
| Dividend income | NaN | NaN | 3,176,854 | |
| Professional fees | NaN | 88,425* | NaN | |
| Interest income | NaN | NaN | 1,917,043 | |
| Brokerage commissions | NaN | 45,867.25* | NaN | |
| Etf transaction fees | NaN | NaN | 12,950 | |
| Directors' fees and insurance | NaN | 16,371* | NaN | |
| Total income (loss)-United States Commodity Index Funds Trust | 34,729,585 | NaN | 12,328,769 | |
| Total expenses-United States Commodity Index Fund | 777,546 | 563,811* | 664,341 | |
| Total expenses-United States Copper Index Fund | 1,403,442 | NaN | 526,262 | |
| Total expenses-United States Commodity Index Funds Trust | 2,180,988 | NaN | 1,190,603 | |
| Expense waiver (note 4)-United States Commodity Index Funds Trust | 0 | NaN | 0 | |
| Net income (loss) | 64,716,568 | 48,880,131 | -4,302,071 | |
| Basic Average Shares | 50,000 | 50,000 | NaN | |
United States Commodity Index Funds Trust (USCI)
United States Commodity Index Funds Trust (USCI)