The country's top 10 firms saw an erosion of nearly Rs 61,000 crore in their market cap last week, with the Reliance Industries' (RIL) market cap slipping below Rs 2,00,000 crore.
The PSU mining giant MMTC was the only one in the elite club to defy the trend and gain Rs 8,278 crore in market valuation.
The total market capitalisation of the elite club comprising six public sector and four private sector entities dropped by Rs 60,872 crore in a week.
At the end of Friday's trade last week, the combined valuation of the premium club stood at Rs 10,41,283 crore, against Rs 11,02,154 crore a week ago.
The country's most valued firm RIL suffered the worst blow losing Rs 21,600 crore in a week and dipped below the Rs 2,00,000-crore mark.
The Mukesh Ambani-led firm saw its valuation drop to Rs 1,90,745 crore at the end of Friday's trade from Rs 2,12,345 crore a week earlier.
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RIL, which was trading at Rs 1,349.25 a share on December 19, skid over 10 per cent during the week to settle at Rs 1,212 per share at the end of Friday's trade.
Also, the state-run NTPC replaced ONGC at the second spot of the coveted club. While oil behemoth lost a huge Rs 14,000 crore, the power utility merely lost Rs 3,958 crore in a week.
The PSU mining giant MMTC added Rs 8,278 crore and increased its valuation to Rs 1,04,115 crore by Friday last.
Sunil Mittal-led company Bharti Airtel lost Rs 6,614 crore. Also, country's biggest lender the State Bank of India saw its valuation go down by Rs 2,755 crore to Rs 78,995 at the end of Friday's trade.