IT major TCS is to start its Rs 18,000 crore-buyback of shares at a price of Rs 4,500 from March 9. This price is at a premium of around 22 per cent to the current market price of Rs 3,485. According to notification on its website, the buyback is open till March 23, 2022 and the buyback proceeds will be credited to investors by April 1. The company had announced the share buyback option in January and the record date for the same was February 23.