I am wondering what is the standard way of calculating holding period returns between two specific dates that are several months apart. Should I just add up log daily holding period returns from CRSP and assume missing returns are equal to zero? Or is there a better way of doing this?
Best way to calculate total returns from CRSP

I am wondering what is the standard way of calculating holding period returns between two specific dates that are several months apart. Should I just add up log daily holding period returns from CRSP and assume missing returns are equal to zero? Or is there a better way of doing this?
NO you cannot assume missing return = 0
GTFO uundergread