As the Fed rate hike rattles markets, the Indian equities benchmarks were trading in red after witnessing early gains on Thursday. At 12:01 am, the 30-share BSE Sensex slumped 773 points or 1.45 per cent at 52,245, whereas the NSE Nifty 50 index declined 93.95 points or 0.60 per cent at 15,598. Notably, the US Federal Reserve hiked the interest rate by 75 basis points, the highest since 1994 in order to tame inflation.