On Aug 26th I
sold 5 aug28th'20 294 Puts for 6.88 and
sold 5 aug28th'20 280 Calls for 5.24
So thats what I thought was the premium.. i dont know what the prices were for 294 calls and 280 puts at the time, but what you say makes sense now
Huh? You shorted the guts for LESS than the strike width. It was a guaranteed loser. Something is wrong here. Your fill equates to the natural fly bought at a credit. The guts have to be worth at least 14.00. You shorted it at 12.12. It was worth 14.00 at expiration.