Philadelphia Stock Exchange (PHLX) The first securities exchange to be formed in the United States. Investopedia Says: Created in 1790, the PHLX trades stocks as well as equity, currency, and index options. Their currency options can be either standard or customized. Related Terms: American Stock Exchange - AMEX Clearing Member Trade Agreement - CMTA National Stock Exchange of India Limited - NSE New York Stock Exchange - NYSE Options Clearing Corporation - OCC |