At 3.30 pm on Thursday, the core equity indices i.e., Sensex and Nifty 50 saw a correction similar to the last trading session. The Sensex was 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.