The 80/105 strangle was 5.10 offered. Probably buy it at 5. A net 7.5 credit for all. If so, you're looking at a 100% loss on risk above 105, terminally.
The 105C went off at 275x285. The 80P went off at 220x225. 495x510 offered.
Shares drop and strips crush on event. Vol and price are inversely correlated within a sigma on index beta. IOW, as long as indices don't crash the vol moves inverse to index vols.
So? You price the delta neutral straddle. Vols are stupid so it's going to be a lot higher than the synthetic px (share synthetic). In this case it was 111 or so.
Obv this is hindsight but the DN combo was the short.