The top 10 companies saw their market capitalisation dipping by over Rs 40,000 crore last week with NMDC losing the most.
State-run NMDC saw a whopping Rs 7,869.93 crore decline in valuation for the week ended September 28.
While, the country's most valued firm RIL lost Rs 4,458.27 crore from market valuation taking its total mcap to Rs 3,44,729.38 crore at the end of the week. RIL's mcap stood at Rs 3,49,187.65 crore for the week ended November 21.
Next comes ONGC which saw its valuation dropping by Rs 203.20 crore to Rs 2,49,862.79 crore.
Trailing behind, power producer NTPC and trading behemoth MMTC together lost a total of Rs 8,097.75 crore. The total valuation of NTPC declined to Rs 1,71,464.34 crore and MMTC's to Rs 1,70,057.25 crore.
The country's largest iron ore miner NMDC witnessed a decline of Rs 7,869.93 crore taking its total market valuation to Rs 1,56,486.71 crore.
The market capitalisation of largest public sector lender SBI declined by Rs 5,920.26 crore to Rs 1,42,371.84 crore and IT bellwether Infosys Technologies' by Rs 5,687.33 crore to Rs 1,33,486.1 crore.
Both top outsourcing firm TCS and power equipment maker BHEL lost Rs 5,896.82 crore from their valuations.
The total market valuation of TCS declined to Rs 1,31,445.55 crore and BHEL's to Rs 1,09,057.71 crore.
Private telecom services provider Bharti Airtel's total m-cap declined by Rs 1,936.39 crore to Rs 1,07,697.37 crore at the end of the week.
Meanwhile, the 30-share index Sensex fell 2.29 per cent or 389.84 points to close at 16,632.01 points on the Bombay Stock Exchange (BSE) at the end of the Friday's trade.