Quote from Martinghoul:
I don't see how you can make such sweeping generalizations and decide that some mkts are good for being selling vol, while others are not so good. Surely, that has to depend on what price the mkt bids vol at, which varies a lot.
All else being equal, what you're suggesting by saying that, for example, 10y notes is a better mkt for selling straddles than spooz is that the bond futures mkt systematically overprices vol more than the equity mkt. That's a rather bold statement.
Yes, the final choice of which markets to use for straddling--or any option strategy--must be based in large part on the status of IV, specifically its position relative to its own range and whether the risk priced into it is being exaggerated. I stated as much, and offered a hypothetical condition whereby all the candidate markets had equally expensive options. That happens often enough. Right before the new year, there were at least 10 futures markets with IV in the top decile of its annual range. Even if we predict that the premium in all 10 of those markets is inappropriately high--that the risk being priced into the options is unwarranted--perhaps there are still markets that shouldn't be traded as short straddles. Are there markets that should be avoided no matter what because they trend hard and fast or pop explosively? Conversely, are there markets that tend to mean-revert more, or chop aimlessly more than trend, or trend gently? I can imagine how that latter type of market is more suitable than the former for short straddling. If both types of markets were at the height of their IV for no good reason, I might sell straddles on the latter, but not the former.
I'm not saying the 10-year bond market is systematically overpriced relative to the S&P--that of course would be completely false. What I am suggesting is that the short-term bonds are a sleepier market than, say, soybeans or natural gas, and thus a short straddler of the 10-year is less likely to suffer the consequences of a protracted trend. Is that too completely false? Some folks here have clearly stated that certain markets are better than others for straddle sales, citing the notion of tameness as a factor in market choice. It sounds like Martinghoul doesn't believe any one market to be tamer than any other, when the absolute IV is taken into consideration. That was my original question: Are tame markets better than wild ones for short straddling, considering that the wild ones have commensurately higher IV to compensate for their unpredictable performance?
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