As many as seven of the top-10 firms added more than Rs 81,000 crore to their market capitalisation during the week, while three state-run companies -- NMDC, NTPC and ONGC -- saw erosion in their valuation.

Mukesh Ambani-led Reliance Industries (RIL) added Rs 25,190 crore to its market cap and taking its valuation to Rs 3,36,958 crore for the week ended September 12.

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NMDC, NTPC and ONGC together lost Rs 1,984 crore from their market cap. NTPC lost Rs 1,031 crore and ONGC dipped by Rs 299 crore.

At the end of the week, the market valuation of ONGC stood at Rs 2,51,606 and NTPC at Rs 1,69,114 crore.

The country's largest iron ore producer, NMDC lost Rs 654 crore reducing its total market cap to Rs 1,42,868 crore.

Trading major MMTC jumped to the third position from the sixth slot after adding Rs 29,323 crore to its market valuation which swelled its market cap to Rs 1,69,740 crore.

Private sector telecom services provider, Bharti Airtel, slipped to the fifth rank from the fourth position even after adding Rs 5,923 crore to its market cap. IT bellwether Infosys Technologies added Rs 3,762 crore to its market valuation.

At the end of the week, the market cap of Bharti Airtel stood at Rs 1,60,170 crore and Infosys at Rs 1,29,855 crore.

The country's largest public sector lender, State Bank of India (SBI), added Rs 9,834 crore to its market cap and power equipment-maker BHEL Rs 2,166 crore at the end of week.

Leading outsourcing firm Tata Consultancy Services (TCS) added Rs 5,461 crore to its market cap taking its total market valuation to Rs 1,09,535 crore.

Apart from top-10 coveted firms, two private sector lenders, ICICI Bank and HDFC Bank, together added Rs 11,801 crore to their market cap. At the end of week, the total market cap of ICICI Bank stood at Rs 93,049 crore and HDFC Bank at Rs 63,657 crore.

In the club of top-10 firms, RIL is followed by ONGC (Rs 2,51,905 crore), MMTC (Rs 1,69,740 crore), NTPC (Rs 1,69,114 crore), Bharti Airtel (Rs 1,60,170 crore), NMDC (Rs 1,42,868 crore), Infosys (Rs 1,29,855 crore), SBI (Rs 1,21,821 crore), BHEL (Rs 1,10,485 crore), and TCS (Rs 1,09,535 crore) in that order.

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