At Close, the Sensex was up 545.25 points or 0.95% at 58,115.50, and the Nifty was up 181.70 points or 1.06% at 17,340 for a fourth straight day as hefty buying in auto, metals, financials, and Reliance Industries lifted sentiment.M&M was the top gainer on Sensex, up 6.29%, followed by Power Grid, NTPC, and Bharti Airtel. Sun Pharma was the top laggard, down 2.81%, accompanied by HUL, IndusInd Bank, and Nestle India. About 2230 shares have advanced, 1145 shares declined, and 187 are unchanged. In the broader market, the BSE MidCap and SmallCap indices added 1.5 percent each. Sectorally, the Nifty Auto index soared 3.3 percent, and the Nifty PSB and Metal indices were 1.5 percent each. The Nifty Pharma index was the only loser, down 0.08 percent.