The American Stock Exchange was an exchange located in New York using the dual auction method and specialist system to facilitate trading in stocks, options and exchange traded funds and portfolios.
Applying "American Stock Exchange / AMEX" to Securities Exams:
The American Stock Exchange sometimes referred to as the “curb” was an exchange developed to facilitate the trading of equities and options. The NYSE acquired the AMEX and rolled its listings on to a separate floor in the NYSE building. The AMEX is now known as the NYSE MKT