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Answer: See explanation
Explanation:
The formula to use here will be:
required rate = risk free rate + beta × (market return - risk free rate).
where,
risk free rate = 5%
beta =0.20.
market return = -30%.
Therefore,
required return = 5% + 0.20 × (-30% + -5%)
= 5% + 0.2(-35%)
= 5% - 7%
= -2%
Therefore, the return on portfolio should have been -2% but the portfolio manager produced a return of −10%
Since -10% is lower than -2%, we can deduce that the claim of the manager is wrong.