New Delhi, Jan. 29 -- The Indian stock market witnessed a strong selloff in the morning session on Thursday, January 29, on profit booking amid elevated geopolitical risks, even as investors awaited the Economic Survey of India- an annual document that reviews the country's economic performance over the past financial year and also offers a policy outlook for the future.

The 30-share pack Sensex crashed over 600 points, or 0.80%, to an intraday low of 81,707.94, while the Nifty 50 also dropped by 0.70% to its day's low of 25,159.80.

The market was witnessing a broad-based selloff, with the mid- and small-cap indices on the BSE also falling by up to 0.70%.

Investors lost over Rs.3 lakh crore within the first hour of the session, as the ...