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Dow Jones Indices
National Association of Securities Dealers Automated Quotations (NASDAQ)

Nasdaq.com is the official website of The Nasdaq Stock Market, the largest US electronic stock market. With approximately 3,200 companies, it lists more companies and, on average, trades more shares per day than any other U.S. market. It is home to companies that are leaders across all areas of business, including technology, retail, communications, financial services, transportation, media and biotechnology.
New York Stock Exchange (NYSE)

With more than 8,000 listed issues, NYSE Euronext is home to the world's leading companies providing access to the global liquidity they need to collaborate, compete and grow. As the world's leading and most liquid equities exchange group, NYSE Euronext powers the exchanging world and is comprised of equities and derivatives exchanges across the United States and Europe which trade cash equities, futures, options, fixed-income and exchange-traded products.