Over-the-counter: Figurative term for the means of trading securities that are not listed on an organized stock exchange such as the New York Stock Exchange. Over-the-counter trading is done by broker-dealers who communicate by telephone and computer networks.

Panic: A series of unexpected cash withdrawals from a bank caused by a sudden decline in depositor confidence or fear that the bank will be closed by the chartering agency, i.e. many depositors withdraw cash almost simultaneously. Since the cash reserve a bank keeps on hand is only a small fraction of its deposits, a large number of withdrawals in a short period of time can deplete available cash and force the bank to close and possibly go out of business.

Price discrimination: Actions that give certain buyers advantages over others.