There are various reasons due to which companies need to raise finance, some of them could be cash injection to expand its existing operations, develop new businesses, buy another company or protect its market share. It need to raise funds depends on the time period ranging from short to long duration. It also depends upon the nature and size of the business along with the sources of funds that would be available to the firm.Through equity company can raise money and it has several ways to do so. Some of the popular ones are IPO, FPO, QIP.