State Bank of India (SBI) shares surpassed the Rs 300-mark on the BSE, surging 5.2 per cent in the intra-day session, and hit a high of Rs 308 on Wednesday. In the past two months, the stock of India s largest public sector lender has leapfrogged 25 per cent at the bourses as against a 13.5 per cent rise in the benchmark S&P BSE Sensex. It took the stock nearly 65 trading sessions to jump from Rs 200 to Rs 300. It hit Rs 200-mark on October 14, on a closing basis. The stock was the top performing stock on the Nifty bank index today, and supported the index to claim a fresh record high. In the intra-day session, Nifty Bank index touched fresh life-time high of 32,683.5 on the National Stock Exchange (NSE), soaring 100 per cent from March lows.