I should of thought of this but think it works: I trade the SPY options...right now the underlying is at $110 or so this morning at 10 AM i shorted a 102 call at $10.15 just before the crash. towards the end of the day I wanted to short again so I shorted the $103 call again at $10.15. Since its 2 different strikes its not the same trade. you could do this for different strikes all day long. or buy different strikes.