The Sensex at the Bombay Stock Exchange rose over 295 points in afternoon trade on fresh buying activity driven by encouraging corporate earnings and a firming trend in the Asian region. The 30-share index which gained over 350 points in its previous session, surged over 295 points to 20,489 when reports last came in.The wide-based index of the National Stock Exchange, NIFTY, moved up by 90 points, to 6,079 a short while ago.