The Sensex closed at 5,229.34, up by 1.91 per cent (97.80 points) over its previous close. Trading in the positive territory throughout the session, the index touched a low of 5,143.19 and a high of 5,232.49 in intra-day trades. The buying intensified in the last session of trading. The NSE S&P CNX Nifty index closed at 1,675.85, surging by 29.60 points. Old economy sectors such as power, cement and automobile saw huge buying interest after Monday