Mumbai: The BSE benchmark Sensex fell by over 76 points in opening trade on Monday as funds and retail investors booked gains recorded in the previous three sessions despite a firming trend on other Asian bourses.

The 30-share Sensex, which has gained nearly 840 points in the previous three sessions, fell by 76.32 points, or 0.45 per cent, to 16,770.51 in opening trade on Monday.

In a similar fashion, the wide-based National Stock Exchange Nifty Index shed 25.10 points, or 0.49 per cent, to 5,025.05.

Stocks of metal, banking, oil and gas and realty firms bore the brunt of the selling pressure, dragging down the Sensex.

Brokers said the emergence of profit-booking by speculators after the recent gains mainly checked a further advance in stock prices, but a slightly better trend on other Asian bourses limited the losses in the domestic market.

Meanwhile, in the Asia region, Hong Kong's Hang Seng Index was up by 0.55 per cent, while Japan's Nikkei gained 0.52 per cent in morning trade on Monday.