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The CAPM assumes that all investors will hold the same portfolio of risky assets. With respect to borrowing at the risk-free rate and on short selling, investors may hold very different portfolios: A. under no circumstances. B. if there are restrictions on borrowing at the risk-free rate but not on short selling. C. if there are restrictions on short selling but not on borrowing at the risk-free rate. D. if there are restrictions on both borrowing at the risk-free rate and/or short selling. |