The National Association of Securities Dealers Automated Quotations, or simply NASDAQ, is a stock exchange with its headquarters in New York City. It was established in 1971 and, after the New York Stock Exchange (NYSE), is the second-largest stock exchange in the US by market capitalisation. It is renowned for both its electronic trading platform and the listing of tech giants like Tesla, Facebook, and Amazon.

The fact that the NASDAQ is a dealer market and the NYSE is an auction market, which implies that in the NASDAQ market, buyers and sellers negotiate trades directly with market makers rather than through an auction, as in the NYSE, is one of the key differences between the two exchanges.

Many of the top technological and growth businesses in the world, such as Apple, Microsoft, Intel, and Cisco Systems, are based on the NASDAQ. It also offers trading in a variety of other products, such as bonds, options, and exchange-traded funds (ETFs). The NASDAQ Nordic and NASDAQ Baltic exchanges are also run by NASDAQ, allowing for the trading of securities throughout Europe.

Other markets run by NASDAQ include the Nasdaq Global Select Market, Nasdaq Global Market, and Nasdaq Capital Market. These markets are divisions of the NASDAQ Stock Market that cater to various business types by having various listing and financial requirements.