BizTerm Definition
Beta equation (mutual funds)
Full Definition

The beta of a fund is determined as follows: [(n) (sum of (xy)) ]-[ (sum of x) (sum of y)] [(n) (sum of (xx)) ]-[ (sum of x) (sum of x)] where: n = # of observations (36 months) x = rate of return for the S&P 500 Index y = rate of return for the fund


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