The variance premium in developed equity markets is a well established phenomenon. It persists . Anyone with an equity portfolio should take advantage of it . And you really should be trading options to do so. But even after accepting this, you still need to decide which particular options to sell. SPY alone has thousands to choose from. Two recent papers help with this decision. The first is, " Understanding and Trading the Term Structure of Volatility" , by Campasano and Linn. They look at the dynamics of implied volatility, and show it depends both on the slope of the term structure and also the maturity of the options. It is the maturity aspect that is relevant to us. They find that the returns to short one month straddles is about three and a half times that of short six month straddles. The other relevant paper is, "Which Index Options Should You Sell" , by Israelov and Tummala of AQR. They look at returns for a given unit of risk. The most interest...
To be able to trade volatility we need to understand it, particularly the interplay between clustering and mean reversion. Most of the predictability of volatility is due to one of these two features.