A buyback, also known as a share repurchase, is when a company buys its own outstanding shares to reduce the number of shares available on the open market. Share repurchase is the re-acquisition by a company of its own shares. Stock buybacks refer to the repurchasing of shares of stock by the company that issued them. When companies buy back shares, the outstanding share capital comes down and this improves the financial valuation metrics such as earnings. Buy-Back is a corporate action in which a company buys back its shares from the existing shareholders. Hello Friends, In this video you will learn what is BuyBack of shares in stock market or share.