Indices open at record high: Sensex tops 53,400, Nifty at 15,915 File The markets opened on a positive notes with the indices touching record levels on Monday in opening trade tracking gains in heavyweights Reliance Industries, ICICI Bank and HDFC. After touching a lifetime high of 53,126.73, the 30-share BSE index was trading 142.85 points or 0.27 percent higher at 53,067.89 in initial deals. The broader Nifty 50 index was just shy of 16,000, rising 130 points. It was trading 42.25 points or 0.27 percent higher at 15,902.60. It touched a lifetime intra-day peak of 15,915.65 in the opening session. Majority of the Nifty sectoral indices traded in the green, led by Nifty PSU Bank index, up 1.8 percent. ONGC, Reliance were among leading gainers on the Nifty in opening trade.