At around 9:30 am, Sensex was trading at 79,158.53 after declining 1,023.67 points or 1.28 per cent, while the Nifty was trading at 23,892.4 after declining 306.45 points or 1.27 per cent. The market trend remained negative. On the National Stock Exchange (NSE), 223 stocks were trading in green, while 2,029 stocks were in red.