Assume straddles on indices/etfs. My calculations tell me that on average, a straddle buyer cannot make more than 32% of the straddle premium on average (~ 43 is win rate of straddle buyer). If you trade straddles: what is your average win as percentage of premium if you are a buyer, and what is your average loser if you are a seller. If any of you buy straddles (not for hedging) please raise your hands. You must be good if you are winning, as I bet that the straddle sellers are those making the money on average (with other proper hedging).