The CAPM formula is given by:
\[
E(R) = R_f + \beta (E(R_m) - R_f)
\]
where:
- \(E(R)\) is the expected return of the portfolio,
- \(R_f\) is the risk-free rate,
- \(\beta\) is the beta of the portfolio,
- \(E(R_m)\) is the expected return of the market.
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