Hey volente, I saw this study done last night and thought of you haha... a variation of T-Day theory - http://quantifiableedges.blogspot.com/2009/01/turnaround-tuesdays.html
I didn't post it because you guys should notice by now, but keeping going long during the night was a simple play because of the 2nd gap rule guarantee...
i often fade the extreme moves / continuations during the night, this works usually quite well (except yesterday!)
Depends on how many puts were opened yesterday of that volume. Could go 82 to 90 sometime by Friday. Understand spy does to have to close at 90, as long as they can get a move back up to collect on the put premium. Also understand that those who sold 83 spy puts at 1 yesterday, don't lose money until spy is under 82. So to simplify, don't be short from 820 to 830 on es in the next few days as the probabilities say it may move from this level to 860 min.