Indian shares tumbled on Monday as an alarming rise in Covid-19 infections and fresh stringent curbs to contain the spread of the coronavirus cast a shadow over the economic recovery. The Sensex fell 1,708 points, or 3.4 per cent, to end the session at 47,883 -- the lowest close since January 29 -- while the Nifty 50 index closed at 14,311, declining 524 points, or 3.5 per cent. The fall was the biggest since February 26 and the second biggest in the past one year. It wiped out Rs 8.8 trillion of India’s market capitalisation. Broad selling was seen across the market as more than five stocks declined for every one advancing stock on the BSE. Overseas investors sold shares worth Rs 1,746 crore on Monday; buying from domestic institutions was also muted at Rs 233 crore.