Usually, companies sell a portion of their ownership to the public in exchange for
money. Investors purchase a share of the ownership by buying shares of the company.
They then become a shareholder. Company stocks are called equities.
Equities are traded on the stock market. These could be in the primary or secondary
market. In the primary market, companies get listed through an Initial Public Offering.
Thus, new securities are available in the primary market. In the secondary market,
investors buy or sell securities, which have already been issued. Currently, more
than 1300 securities are available for equity trading on the National Stock Exchange
(NSE) and over 5500 on Bombay Stock Exchange (BSE).