An investor decides to short-sell shares of W Corp, borrowing then selling 100 shares for $48.50 each. His broker requires that 150% of the positions market value remain in the account. a) If the price per share rises to $57.65, how much money will the investor be required to transfer to his broker to avoid a margin call? b) What would be his rate of return if the share price fell to $32.65 from $48.50? c) Market makers are often said to be on the losing end of information-based trades in the market. Explain briefly

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