Suppose that XTel currently is selling at $50 per share. You buy 500 shares using $20,000 of your own money, borrowing the remainder of the purchase price from your broker. The rate on the margin loan is 8%.

a. What is the percentage increase in the net worth of your brokerage account if the price of XTel immediately changes to (i) $44; (ii) $40; (iii) $36? What is the relationship between your percentage return and the percentage change in the price of XTel?
b. If the maintenance margin is 25%, how low can XTcl's price fall before you get a margin call?
c. How would your answer to (b) change if you had financed the initial purchase with only $10,000 of your own money?
d. What is the rate of return on your margined position (assuming again that you invest $ 15.000 of your own money) if XTel is selling after one year at (i) $44; (ii) $40; (iii) $36? What is the relationship between your percentage return and the percentage change in the price of XTel? Assume (hat XTel pays no dividends.
e. Continue to assume that a year has passed. How low can XTel's price fall before you get a margin call?