Problem:
Rudolfo purchased 900 shares of stock for $62.20 a share six months ago. The initial margin requirement on this stock is 75 percent and the maintenance margin is 40 percent. Rudolfo pays a 3% on his margin loan, what is his holding period return if today when he sells it, stock price rises by 25%? What if the stock price declines by 25%? (note: 3% is annualized effective rate).