Best option strategy for after earnings

From the other thread where several replies mentioned the problem with vol crush after earnings. Let's say you know the direction, and that the move will be 5-30%. What is the most optimal option spread or strategy to profit from this?
 
It depends on what the options are implying. If the move is 5% and options are implying 30 then you sell gamma. if the move is 30% and options are implying 5% then you buy gamma.
 
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