You purchased 100 shares of stock in a company for $21.44, financing 50 shares yourself and borrowing funding from your broker to purchase the additional 50 shares (margin account). Later the price dropped to $18.42, at which point you decided to cut your losses and sold the 100 shares. If no dividends were paid and you had to pay a total of $100 in interest to your broker ($2 per share borrowed), what is your holding period return?