Shares of RailTel Corporation of India surged for the third straight day on Tuesday to hit a fresh 52-week high on the BSE amid strong investor interest on the counter. The shares of the firm which got listed on Friday, have zoomed nearly 85 per cent over its issue price of Rs 94. The scrip jumped 19 per cent over its previous close to hit an intra-day high, also its 52-week high, of Rs 173.50 on the BSE. At 11.40 am, the stock was trading 16 per cent up at Rs 168.60 while the BSE barometer Sensex was up 0.41 per cent at 50,054 around the same time. The trading volume on the counter was high with a combined 34 million shares having changed hands on the NSE and BSE so far.