The stock exchange is a trading institution that is specialized market in which securities are traded under special rules and ropes. The focus of the work will be on presentation of the functioning of one of the world´s largest financial exchanges, namely New York Stock Exchange, and which are the most famous stock indices. How the stock market was legally created and it is development over the centuries. When it came to the stock market, one should touch on the financial market, and one of the basic divisions of the market is the division into the money market and the capital market. The financial market is most often defined as the place of supply and demand of financial resources in this case of securities. When mentioning the stock market, the concept of stock indices is often mentioned. A stock exchange code is a set of selected securities representing theen tire market. They reflect the current state of the capital market.