The Bombay Stock Exchange benchmark index Sensex fell by 138 points in early trade today as foreign funds and retail investors booked profits at existing higher levels amid weak global markets.

The 30-share index, which had lost over 47 points in the past two sessions, fell by 138.09 points, or 0.65 per cent, to 15,193.85 points in the first five minutes of the trade. Meanwhile, the National Stock Exchange index Nifty lost 43.05 points to 4,521.05 points.