NYSE
The New York Stock Exchange is the world's leading and most technologically advanced equities market. A broad spectrum of market participants, including listed companies, individual investors, institutional investors and member firms, create the NYSE market. Buyers and sellers meet directly in a fair, open and orderly market to access the best possible price through the interplay of supply and demand. On an average day, 1.46 billion shares, valued at $46.1 billion, trade on the NYSE. In 2004, the NYSE was again the most competitive venue for trading its listed stocks, providing investors with the lowest costs, deepest liquidity and best prices.
http://www.nyse.com
AMEX
The American Stock Exchange has been a pioneer in market innovation for more than a century and remains committed to developing successful new investment products and innovative services for companies and investors.
As the nation's most diversified financial marketplace, the American Stock Exchange conducts trading through an advanced centralized specialist system and is committed to providing a superior marketplace for the investing public and its members.
http://www.amex.com
NASDAQ
NASDAQ is the largest U.S. electronic stock market. With approximately 3,300 companies, it lists more companies and, on average, trades more shares per day than any other U.S. market. It is home to category-defining companies that are leaders across all areas of business including technology, retail, communications, financial services, transportation, media and biotechnology. NASDAQ is the primary market for trading NASDAQ-listed stocks. Approximately 54% of NASDAQ-listed shares traded are reported to NASDAQ systems.
http://www.nasdaq.com
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