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Schedule of Investments (Unaudited) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
-1x Short VIX Futures ETF [Member]    
Call Options - 0.1%    
Value $ 442,800 [1] $ 891,000
TOTAL INVESTMENTS 442,800 891,000
Other Assets in Excess of Liabilities 186,490,400 [2] 148,932,951 [3]
TOTAL NET ASSETS 334,930,073 212,031,300
-1x Short VIX Futures ETF [Member] | Money Market Deposit Account [Member]    
Call Options - 0.1%    
US Bank Money Market Deposit Account 147,996,873 [4] 62,207,349 [5]
-1x Short VIX Futures ETF [Member] | Call Option [Member] | CBOE Volatility Index [Member]    
Call Options - 0.1%    
Notional Amount 13,635,000 [1],[6],[7] 13,455,000 [8],[9],[10]
Contracts 5,400 [1],[6],[7] 9,000 [8],[9],[10]
Value 442,800 [1],[6],[7] 891,000 [8],[9],[10]
2x Long VIX Futures ETF [Member]    
Call Options - 0.1%    
Value (64,933,436) 6,528,043
TOTAL INVESTMENTS
Other Assets in Excess of Liabilities 149,892,605 [11] 268,723,012 [12]
TOTAL NET ASSETS 288,946,914 331,291,100
2x Long VIX Futures ETF [Member] | Money Market Deposit Account [Member]    
Call Options - 0.1%    
US Bank Money Market Deposit Account $ 139,054,309 [13] $ 62,568,088 [14]
[1] Non-income producing security.
[2] Includes cash of $158,007,917 that was pledged as collateral for futures and options contracts.
[3] Includes cash of $154,886,352 that was pledged as collateral for futures and options contracts.
[4] The U.S. Bank Money Market Deposit Account (the “MMDA”) is a short-term vehicle in which the Fund holds cash balances. The MMDA will bear interest at a variable rate that is determined based on market conditions and is subject to change daily. The rate as of March 31, 2026 was 3.15%.
[5] The U.S. Bank Money Market Deposit Account (the “MMDA”) is a short-term vehicle in which the Fund holds cash balances. The MMDA will bear interest at a variable rate that is determined based on market conditions and is subject to change daily. The rate as of December 31, 2025 was 3.15%.
[6] 100 shares per contract.
[7] Exchange-traded.
[8] 100 shares per contract.
[9] Exchange-traded.
[10] Non-income producing security.
[11] Includes cash of $201,645,499 that was pledged as collateral for futures and options contracts.
[12] Includes cash of $263,069,326 that was pledged as collateral for futures and options contracts.
[13] The U.S. Bank Money Market Deposit Account (the “MMDA”) is a short-term vehicle in which the Fund holds cash balances. The MMDA will bear interest at a variable rate that is determined based on market conditions and is subject to change daily. The rate as of March 31, 2026 was 3.15%.
[14] The U.S. Bank Money Market Deposit Account (the “MMDA”) is a short-term vehicle in which the Fund holds cash balances. The MMDA will bear interest at a variable rate that is determined based on market conditions and is subject to change daily. The rate as of December 31, 2025 was 3.15%.