In most cases,i.e. bill marlkets,the larger the delta,the higher the returns..
I backtested NVDA 30 day rolling options over 10 years,running detas of .30,vs .50 vs .80...
Sharpe on the 30 delta was awful,Sharpes on the 50 and 80 were both apx 1...Interestingly,the Sortino on the 80 delta was...