WordNet (r) 3.0 (2006):

AMEX
    n 1: a stock exchange in New York [syn: American Stock
         Exchange, AMEX, Curb]

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "Amex":
   American Stock Exchange, Wall Street, board, bourse,
   commodity exchange, corn pit, curb, curb exchange, curb market,
   exchange, exchange floor, outside market, over-the-counter market,
   pit, quotation board, stock exchange, stock market, stock ticker,
   telephone market, the Big Board, the Exchange, third market,
   ticker, ticker tape, wheat pit