stock trading it take place through Registered Stockbrokers, Transfer Agent etc. Buyer gets in touch with a Broker, and gives him all the details of shares he wants to buy and SEBI monitors and securities market and protects the interests of the investors by enforcing certain rules and regulations. the prices in the stock market are driven by supply and demand. This makes the stock market similar to other economic markets. When a stock is sold, a buyer and seller exchange money for share ownership. The price for which the stock is purchased becomes the new market price.