Intraday trading, often called simply "day trading," is the practice of buying and selling a financial product on the same day. It is often mentioned in reference to the stock market, but you can also day trade many other types of financial vehicles. It is a high-energy field that carries substantial risks but also offers considerable profit opportunities. Successful day traders can earn a good and consistent living. Definition Day trading is a tightly regulated practice in the stock market. Thus, it requires a strict definition. The Financial Industry Regulatory Authority, or FINRA, defines day trading as the buying and selling of a security on the same day. The buying and selling may occur in either order. If you "short" stock, which means you sell stock you do not yet own, and then buy it back later in the same day, this is also a day trade. Day traders can profit from intraday declines in any stock in this way. Pattern Day Trading People who ...