Quote from mahras2:
So you mean dispersion as in vol arbitrage? For example, short options in the index and long the components? Isn't that field too crowded so that the edge has been exploited (index options are now fairly valued instead of being more expensive than the stocks)?
Or am I completely misunderstanding you?![]()
I heard the same argument (the edge has been exploited) before. What does it means ? There was imbalance in vols between components and Index 15 years ago ? And now its gone ? Riskarb mentioned it too once and I read the same on the internet. Then , what about the perfect option's pricing theory ? You cannot have both in the same time. IOW , if basket's components were price too high OR Index vols too low , one could successfully trade one leg as a stand alone strategy.
I would like to hear from the pros why vols arbitrage works one BUT not working anymore. BTW , I don't belive that its an "arbitrate' per se ; I can create an end of the month scenario with guaranteed neg PnL for any given position.
M2 , this was a bit of subject , feel free to delete if you want.
Good luck