Shares of the country's largest information technology company - Tata Consultancy Services (TCS) - rose as much as 3.24 per cent to hit an intraday high of Rs 3,979.90 after the company informed exchanges that its board will consider share buyback proposal on January 12 when it will announce its December quarter earnings. The company did not elaborate about the size of share buyback and at what price it will buy its shares back from investors.