1. partial payment made by an investor to a broker for securities purchased, with the remainder on credit. The broker retains the securities as collateral and charges the investor interest on the money owed. The Federal Reserve Board determines margin requirements. The margin requirement for stocks is higher than that for convertible bonds because of greater risk. Assume that with a margin requirement of 50% (present requirement), 100 shares of XYZ stock are bought at $100 per share. The actual amount invested is $5000, with a margin of $5000 on credit.

2. in commodities trading, deposits required by commodities exchanges.