Realized Alpha

CFA Level II Equities
#1

Hi,

So isn’t the formula for realized alpha = actual holding period return - Contemporaneous required return?

Because in a question its solved like this: actual holding period return - required return of the same stock on a weekly basis.

#2

it should be

realized alpha = actual holding period return - required holding period return

#3

So if the required return of another stock with similar characteristics is given then we can use that as well?