The SENSEX Index fell 290 points or 0.37 percent on Thursday to close at 77183 points. Leading the losses are HDFC Bank (-1.75%), Mahindra & Mahindra (-1.65%) and NTPC (-1.58%). Top gainers were Kotak Mahindra Bank (1.84%), Adani Ports (1.33%) and Tech Mahindra (1.27%).