Cboe Vix Future 01/17/2018 (Uxf8) N/A 34.65% Cboe Vix Future 12/20/2017 (Uxz7) N/A 32.00% Cboe Vix Future 11/15/2017 (Uxx7) N/A 17.35% Cboe Vix Future 02/14/2018 (Uxg8) N/A 15.95%