CHECK DIGIT is a redundant digit added to a code to check accuracy of other characters in the code.
COVERAGE OF FIXED CHARGES is computed by taking your net income, before taxes and fixed charges (debt repayment, long-term leases, preferred stock dividends etc.), and dividing by the amount of fixed charges. The resulting number shows your ability to meet your fixed obligations of all types i.e. the higher the number, the better.
MARGIN is a. in accounting see GROSS MARGIN; or, b. in securities, it is the process whereby investors are allowed to buy securities on credit. By buying on margin, the investor significantly increases the leverage, or risk/return potential, of the investment. For example, a purchase of $100 worth of stock with cash of $50 means a four to one increase in value if the stock doubles (versus a two to one increase if the purchase is all cash). On the other hand, if the stock declines, the investor would be forced either to put up more cash or sell the stock at a loss to meet margin requirements established by the Federal Reserve Bank. The margin rules currently stipulate that an investor must maintain 50% of the total market value of the securities in the account in cash.
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