Beta (finance)/Definition: Difference between revisions

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A  measure of the degree to which the price of a share tracks the market average (defined as the ''covariance'' (qv) between the price of the share and the average  market price, divided by the ''variance'' (qv) of the market price). If beta = 1 the share price moves in line with the market price; if it is negative, it falls when the market price rises. (Also applied to rates of return).
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A  measure of the degree to which the rate of return of a share tracks that of the equity market as a whole (defined as the [[covariance]]  between the share's rate of return  and the average  market rate, divided by the [[variance]]  of the market rate). If beta = 1 the share's rate of return moves in line with the market rate; if it is negative, it falls when the market rate rises.

Latest revision as of 06:45, 22 February 2010

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Beta (finance) [r]: A measure of the degree to which the rate of return of a share tracks that of the equity market as a whole (defined as the covariance between the share's rate of return and the average market rate, divided by the variance of the market rate). If beta = 1 the share's rate of return moves in line with the market rate; if it is negative, it falls when the market rate rises.