AMEX Composite Index

The AMEX Composite Index is an index that reflects the combined market capitalization of securities traded on the American Stock Exchange. The AMEX Composite Index was first introduced in January 1997 and was calculated using a base value of 550 on December 29, 1995. AMEX Composite Index components include common stocks, REITs, closed end investment vehicles, ADRs, and master limited partnerships. The AMEX Composite Index is a market capitalization-weighted index where day-to-day price changes and number of outstanding shares of each AMEX Composite Index component influences the value of the index. New listings, delistings, suspensions, stock splits, dividends, and trading halts don't alter the AMEX Composite Index. The AMEX Composite Index is distinct from the AMEX Major Market Index, which is a price-weighted index of 20 blue chip stocks issued by major U.S. industrial corporations. On October 1, 2008 NYSE Euronext purchased the American Stock Exchange and in 2009 changed its name to NYSE Amex Equities. Although it is still referred to as simply the AMEX Composite Index and can be found under the symbol XAX, the AMEX Composite Index was renamed the NYSE AMEX Composite Index as a result of this purchase.