Mumbai-Sensex at Bombay Stock Exchange surged 301 points to close at 33,250.30 on unabated buying by domestic institutional investors amid positive global leads.NSE Nifty too went past the 10,250-level.BSE Sensex opened on a strong footing at 33,034.20 and maintained its upward trend to hit the day’s high of 33,285.68 before ending at 33,250.30, up 301.09 points.The index had rallied 352.03 points in the previous session on value-buying by investors in recently-battered blue-chip stocks.