The benchmark Sensex at the Bombay stock exchange fell by 108 points in late morning trade on continued selling by foreign funds and retail investors in the absence of any positive trigger.The 30-share barometer, which had lost 103points in early trade today, was trading 108 points in the negative territory at 17,193 when reports last came in . In a Similar fashion, the wide-based National Stock Exchange Nifty index was trading 37 points in red at 5,202.50 a short while ago.