The combined market valuation of seven of the top-10 Sensex companies tumbled Rs 47,050 crore, with Reliance Industries and HDFC Bank taking the biggest hit, in the worst week for the benchmark index in six months.
ONGC, Infosys and Coal India also lost value last week, while the market capitalisation (m-cap) of ITC, Wipro and Bharti Airtel increased.
Reliance Industries' market capitalisation plunged by Rs 11,669 crore to Rs 2,68,502 crore, while that of HDFC Bank declined by Rs 10,679 crore to Rs 1,50,704 crore.
ONGC's worth declined by Rs 6,631 crore to Rs 2,35,703 crore.
The m-cap of Coal India dropped by Rs 6,569 crore to Rs 1,56,330 crore, while mortgage lender HDFC took a hit of Rs 5,738 crore to Rs 1,25,999 crore.
The m-cap of Infosys declined by Rs 3,423 crore to Rs 2,12,435 crore and the value of TCS slipped Rs 2,341 crore to Rs 4,38,010 crore.
Bharti Airtel's value rose by Rs 740 crore to Rs 1,25,978 crore, while ITC added Rs 714 crore to Rs 2,58,135 crore.
Wipro's m-cap moved up by Rs 433 crore to Rs 1,41,763 crore.
TCS continued to rule the domestic market capitalisation chart, followed by Reliance, ITC, ONGC, Infosys, Coal India, HDFC Bank, Wipro, HDFC and Bharti Airtel.
Last week, the benchmark BSE Sensex lost 619.71 points, or 2.93 per cent, to settle at 20,513.85 on Friday.