The key issue in oligopoly markets is the seller's actions: a. Completely independent of each other. b. Controlled by the main seller in the market. c. Interdependent in that the actions of one seller directly impact all other sellers. d. Regulated or controlled by a government agency.

You are bearish on telecom and decide to sell short 100 shares at the current market price of $50 per share. a. how much in cash or securities must you put into your brokerage account if the broker’s initial margin requirement is 50% of the value of the short position? b. how high can the price of the stock go before you get a margin call if the maintenance margin is 30% of the value of the short position? (input the amount as a positive value. round your answer to 2 decimal places.)