The Nifty 50 closed flat with a negative bias on December 30, extending its downtrend for a fourth day. Technical indicators suggest a bearish outlook, with the index below short-term moving averages. A Doji candlestick pattern indicates indecision, hinting at a potential bounce-back toward 26,100-26,300 if confirmed. Failure to rebound could lead to a decline towards 25,800-25,700.