Quote from stevenpaul:
Good research. You list to some compelling examples of your point. However, bid-ask spreads aren't always prohibitively high, particularly when the underliers are highly liquid. Check out the bid-ask spread on the SPDRs, for example, or say, Citigroup (although there may be other reasons to steer clear of that underlier). Regarding leverage, I don't think options should be used for leverage, for some of the reasons you state. It's the volatility edge that intrigues me. As McMillan explains it, change in volatility is easier to predict than change in price. Trading price is a sucker's game where anything goes, whereas trading volatility has a basis in statistics. Sure, high IV can keep going higher, as we saw two years ago, but normally it stays within a set range. Over time, high-probability trades should result in above average returns, and volatility trading is one type of trading that can be done so that it is mathematically favorable and the planned outcome, somewhat more probable.