Why do you take UVXY and not VXX , since the margin on UVXY is double than with VXX. if you looked at VXX 27Puts. they sold for 0.50 at the same time you sold your 0.60 puts with the same risk (UVXY was 24 - 22 put 8% away) so the same as VXX 4% away. You could have sold 4 put contracts for the same margin risk , and catch 200 bucks :-)