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2. You deposit 85000 and short 100 shares of stock at $100 per share. Soon after, the stock price rises to $125. The maintenance margin is 25%. (a) What is your equity return? (b) What is the margin? You receive a margin call. You decide to close out a portion of your short position. You use the cash in your broker account to buy back shares and return to the original owner. (c) At least how many shares do you need to buy back