What is Beta and Why is it important? Why do so many softwares have so many different ways of estimating Beta? Which is correct? These are fundamental issues in the design of portfolio management software.
Beta measures exposure to market risk. Moreover, in the CAPM expected returns depend on Beta. Barra estimates Betas using past Betas plus information about fundamentals e.g. volatility of earnings.
Saturday, 3 October 2009
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