Equity benchmark Sensex plunged by 554.05 points on Tuesday, tracking deep losses in realty, auto and metal stocks amid widespread selling pressure in global markets. The 30-share index slumped by 554.05 points or 0.90 per cent to end at 60,754.86. The broader NSE Nifty fell by 195.05 points or 1.07 per cent to 18,113.05.