At 1.30 pm on Monday, the core equity indices i.e., Sensex and Nifty 50 were trading marginally higher since the morning session. The Sensex was trading at 57,824, down by 172.68 points or 0.30 per cent, while Nifty was at 17,283.80 down by 38.40 points or 0.22 per cent from the last trading session.