Shares of RailTel Corporation of India (RailTel) rallied 17 per cent to Rs 142.45 on the National Stock Exchange (NSE) in intra-day trade on Monday after the institutional investors bought a stake in the company via open market on its debut day on Friday. The stock of the state-owned telecom infrastructure provider made a strong debut on the bourses as it got listed at a 28 per cent premium at Rs 120.60. With today’s rally, it has zoomed 52 per cent from its issue price of Rs 94. On Friday, February 26, Goldman Sachs India Fund and Nippon India Mutual Fund collectively bought 10.7 million equity shares of RailTel worth Rs 120 crore through block deals on the NSE, the exchange data shows.