Infosys wants to buy back your shares for 9,300 crore. What can a company do when it has excess cash in its coffers? It could reinvest this money or pick up a new project and work on it. But if these options are limited, it could choose to reward its shareholders by sharing the proceeds with them. Or they could do a share buyback where an investors are afforded the opportunity to sell their shares back to the company at a premium.