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Statements of Cash Flows (Unaudited) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
-1x Short VIX Futures ETF |  |  |  |
CASH FLOW FROM OPERATING ACTIVITIES |  |  |  |
Net increase (decrease) in net assets resulting from operations | $ 36,060,399 | $ (242,779) | $ 47,275,949 | $ (4,121,170)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities |  |  |  |
Purchase of investments | (117,945,818) | (86,248,199) | (227,091,533) | (87,243,243)
Proceeds from sales or maturities of investments held | 123,386,374 | 78,851,911 | 227,091,533 | 78,951,910
Decrease (Increase) in Deposits at broker for futures contracts | 12,091,557 |  | (20,559,259) | (39,872,983)
Decrease (Increase) in Variation margin receivable | (777,982) | 835,808 | (1,242,108) |
Decrease (Increase) in interest receivable | 19,618 | (4,573,051) | (294) | (9,602)
Decrease (Increase) in other receivables | 492 | (37,960,927) | 318 |
Decrease (Increase) in Prepaid expenses and other assets | (13,235) | 4,018,702 | (24,085) |
Decrease (Increase) in Due from Other | 26 | (9,596) |  |
Increase (Decrease) in Due to Custodian | (3,086,000) | 764 | 1,023,713 |
Increase (Decrease) in Due to Other |  |  |  |
Increase (Decrease) in Variation margin payable |  | 4,105,647 | (187,030) | 583,031
Increase (Decrease) in Payable to Sponsor | (6,936) | 62,014 | 16,246 | 62,124
Increase (Decrease) in Administrative, accounting and custodian fees payable | 6,731 | 21,906 | (1,163) | 22,421
Increase (Decrease) in Professional fees payable | 13,987 | 15,000 | 43,758 | 15,210
Increase (Decrease) in Licensing and registration fees payable | 8,348 | 34,725 | 14,166 | 35,642
Net cash provided by (used in) operating activities | 49,757,561 | (41,088,075) | 26,360,211 | (51,576,659)
CASH FLOW FROM FINANCING ACTIVITIES |  |  |  |
Proceeds from shares sold, net of cost from shares purchased | 30,240,210 | 45,490,185 | 114,890,805 | 131,987,206
Cost of shares redeemed | (79,997,771) |  | (141,755,616) | (76,871,017)
Net cash provided by (used in) financing activities | (49,757,561) | 45,490,185 | (26,864,811) | 55,116,189
NET INCREASE (DECREASE) IN CASH |  | 4,402,110 | (504,600) | 3,539,530
Beginning of Period |  | (862,580) | 504,600 |
End of Period |  | 3,539,530 |  | 3,539,530
2x Long VIX Futures ETF |  |  |  |
CASH FLOW FROM OPERATING ACTIVITIES |  |  |  |
Net increase (decrease) in net assets resulting from operations | (147,606,672) | (180,611) | (197,444,087) | 7,364,866
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities |  |  |  |
Purchase of investments | (170,380,218) | (60,472,471) | (309,353,524) | (60,968,753)
Proceeds from sales or maturities of investments held | 176,796,775 | 43,818,993 | 308,086,262 | 43,818,993
Decrease (Increase) in Deposits at broker for futures contracts | (9,303,378) |  | 31,518,493 | (40,554,763)
Decrease (Increase) in Variation margin receivable |  | (256,944) | 830,840 | (1,433,096)
Decrease (Increase) in interest receivable | 9,245 | 7,528,449 | (14,869) | (12,375)
Decrease (Increase) in other receivables | 1,775 | (39,378,470) | 19 |
Decrease (Increase) in Prepaid expenses and other assets | (10,933) | (121,254) | (10,101) |
Decrease (Increase) in Due from Other |  | (12,371) |  |
Increase (Decrease) in Due to Custodian | 2,491,372 | 200 | 2,874,781 |
Increase (Decrease) in Due to Other |  | (161,534) |  | 1,016,260
Increase (Decrease) in Variation margin payable | 2,165,122 |  | 3,406,049 |
Increase (Decrease) in Payable to Sponsor | 4,019 | 70,197 | (37,988) | 70,335
Increase (Decrease) in Administrative, accounting and custodian fees payable | 1,677 | 22,082 | (1,860) | 22,597
Increase (Decrease) in Professional fees payable | 12,757 | 14,963 | 42,621 | 15,174
Increase (Decrease) in Licensing and registration fees payable | 15,892 | 36,514 | 27,868 | 37,431
Net cash provided by (used in) operating activities | (145,802,567) | (49,092,257) | (160,075,496) | (50,623,331)
CASH FLOW FROM FINANCING ACTIVITIES |  |  |  |
Proceeds from shares sold, net of cost from shares purchased | 192,593,274 | 49,351,251 | 278,976,878 | 102,394,101
Cost of shares redeemed | (46,790,707) |  | (118,901,382) | (51,662,990)
Net cash provided by (used in) financing activities | 145,802,567 | 49,351,251 | 160,075,496 | 50,731,111
NET INCREASE (DECREASE) IN CASH |  | 258,994 |  | 107,781
Beginning of Period |  | (151,213) |  |
End of Period |  | $ 107,781 |  | $ 107,781

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