The Bombay Stock Exchange benchmark Sensex opened 97 points up today, on fresh buying by funds at attractive lower levels amid mixed trend in Asian regions. The 30-share index, which has lost nearly 640 points in the previous three sessions, recovered 97.08 points to 19,415.24 level during the first five minutes of trading. Similarly, the wide-based National Stock Exchange index Nifty also gained 38.75 points to 5,838.50 points.