At 2 pm on Wednesday, the core equity indices i.e., Sensex and Nifty 50 were seen regaining lost levels ahead of the RBI Monetary Policy meet. The Sensex was at 58,453 up by 474.62 points or 1.9 per cent, while Nifty was at 17,405.09 up by 155.36 points or 1.8 per cent from the last trading session.