At 12.30 pm on Thursday, the core equity indices i.e., Sensex and Nifty 50 were seen extending losses and were trading at a discount of more than 2 per cent. The Sensex was at 56,554.22 down by 1303.93 points or 2.25 per cent, while Nifty was at 16,934.90 down by 343.05 points or 1.99 per cent from the last trading session.