2 The Stock Market Stock a claim to partial ownership in a firm equity finance vs debt finance stock exchange, e.g. New York Stock EXchange, the American Stock EXchange, NASDAQ(National Association of securities Dealers automated Quotation system) prices are determined by the supply and demand for the stock in these companies stock index: an average of a group of stock prices2. The Stock Market ➢ Stock ⚫ a claim to partial ownership in a firm ⚫ equity finance vs debt finance ⚫ stock exchange, e.g. New York Stock Exchange, the American Stock Exchange, NASDAQ (National Association of Securities Dealers Automated Quotation system) ⚫ prices are determined by the supply and demand for the stock in these companies. ⚫ stock index: an average of a group of stock prices