I want the formula to return the sum of return of T-1, T+0, T+1 (lookup column referring to column A in the '1636' tab, please ignore column B)based on the announcement date in the summary page (e.g. return sum of S979:S981 in '1636' tab)
Note: there are 200 similar tabs as '1636'. I think indirect function would help but I don't know how.
Test.xlsx
Bookmarks