The Sensex at the Bombay Stock Exchange firmed up by 107 points in the afternoon trade following Reserve Bank of India's mid-quarter policy review today.The 30-share index, which rose by a mere 7 points in its previous trade , gained 107 points to 19,351 short while ago.Similarly, the wide-based National Stock Exchange index Nifty moved up by 30 points to 5,887 when reports last came in.