Quote from IV_Trader:
Mav , what about diff vols on diff strikes ? Both cannot be "placed" fairly , something has to give. If one can gamma scalping it , isn't an small edge ? And any large move in any detection is very welcome here.
You'll simply hedge less size on the skewed-vols assuming implied vols are indicative of realized stat-vol. The edge, or lack thereof, will be reflected in the hedging frequency.
What concerns me of this "FairVal" talk is the guy who is proven right on vol, but misses that long gamma hedge by a few ticks. A buddy was long 30 Cu futures into the rally and missed his sigma-point by 4 ticks. It reversed to neutrality. Happens ever single day in every crowd of locals.
There is no difference in the expectancy of the long/short vertical. I am sure we're aware of that and the fallacy of models as well.
What makes the long spread "better" is gap-risk... if you're long the spread and spoos open down 100 on some event risk you're rich, at the expense of the seller. There is no analog for the short 2sigma credit spreader. Throw vols out the window. It's pure distribution risk. Can someone go 10 years or more selling upside gamma? Sure.
You're just really good at navigating, searching, threading, etc. this site.
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