The National Association of Securities Dealers Automated Quotations known as NASDAQ,'s an American stock exchange. It's the largest electronic screen-based equity securities trading market in the United States. With approximately 3,800 companies and corporations, it's more trading volume per hour than any other stock exchange in the world. It was founded in 1971 by the National Association of Securities Dealers (NASD), who divested themselves of it in a series of sales in 2000 and 2001. It's ow… (More on Nasdaq)