Sensex jumps over 150 pts in opening trade; Nifty tests 15,700

After jumping nearly 180 points in the opening session, the 30-share BSE index turned flat to trade 20.04 points or 0.04 per cent higher at 52,120.09 in initial deals. Similarly, the broader NSE Nifty advanced 29.20 points or 0.19 per cent to 15,699.45.