Equity benchmark Sensex declined over 190 points in early trade on Monday, tracking losses in index heavyweights Reliance Industries, ICICI Bank and Infosys amid weak sentiment in Asian markets. The 30-share Sensex was trading 193.16 points or 0.33 per cent lower at 58,111.91. Similarly, Nifty fell 37.90 points or 0.22 per cent to 17,331.35 in initial deals.