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I calculated monthly returns and standard deviation using adjusted closing price from stock prices using this: onemonth=@datediff(@date,@dateadd(@date,-1,"month"),"b") then: xreturn = (adj_close/adj_close(-1)-1) Now i need to add to the dataset the historical prices for the FTSE1...

I'm struggling to create a formula for monthly returns (5 day week). I have the exact same query as http://forums.eviews.com/viewtopic.php?f=3&t=1863
I don't know if anyone has found a formula for this yet.