Imagine a one-period economy where the state-price deflator is lognormally distributed with E[ln ] =

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Imagine a one-period economy where the state-price deflator ζ is lognormally distributed with E[ln ζ ] = μζ and Var[ln ζ ] = σ 2

ζ . What is the maximal Sharpe ratio of a risky asset? (Look at Eq. (4.8).) What determines the sign of an asset’s Sharpe ratio?

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