Quote from MasterAtWork:
Hi Walt,
Before trying to answer your question, take a look at what probabilities you refer. How are they computed, underlying assumptions, in which "univers"...
You then would realize that probabilities mean nothing (see gaps, jumps, crashes...) and the main point is costs and common sens.
You would need the all set of eventuality to work with probability, and there is no such a thing available on markets.
A 1800 S&P oct call got a probability much smaller than a 1500 put to be in the money at expiration date, but it doesn't mean it will.
Lehman or Bear stern collapses were out of probability 2 years ago. Hence, LEAPS deep out of the money puts were no probability, but common sens.
Probabilities don't make money, but costs always eat it.
I agree that probabilities have been foiled. Afterall, that's the essence of Nassim Taleb's Black Swan epistemology. However, that's why I coupled risk management with probabilities. LTCM, Victor Niederhoffer & many other hedge funds that failed reportedly did so (at least in part) due to being overleveraged.
Walt
