The Bombay Stock Exchange benchmark Sensex on Monday plunged over 480 points on profit-booking in heavy-weights led by banking, refining and metal stocks, as investors felt the recent surge in equities was overdone.

The Sensex, which had gained about 21 per cent in the past three weeks to regain the 10,000-point level, dropped by 480.35 points at 9,568.14. The key index moved between 9,902.35 and 9,520.96 points.