As many as six among the top 10 firms added over Rs 28,415 crore to their market capitalisation in the past week, while companies like NTPC, NMDC and IT bellwether Infosys Technologies saw their valuations dipping.

State-run NTPC and NMDC lost Rs 4,989 crore and Rs 5,154 crore, respectively, in their valuation during the week ended August 15.

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Meanwhile, India's largest oil producer ONGC gained the most by adding Rs 17,571 crore to its market cap, taking its total market valuation to Rs 2,60,985 crore at the end of the week.

The ONGC scrip surged 7.21 per cent last week to close at Rs 1,220.20 on the Bombay Stock Exchange on Friday.

The country's most valued firm, Reliance Industries (RIL), added Rs 6,044 crore to its valuation during the week ended August 15. RIL's market cap rose to Rs 3,20,172 crore at the end of the week.

Private sector telecom services provider Bharti Airtel jumped to fourth place from fifth after adding Rs 9,169 crore to its market cap, taking its total market valuation to Rs 1,54,892 crore.

Trading firm MMTC and IT services provider Infosys Technologies lost Rs 1,112 crore and Rs 117 crore, respectively, during the last week.

The total market cap of MMTC stood at Rs 1,43,085 crore and Infosys Technologies at Rs 1,16,896 crore at the end of the week.

The country's largest, public sector lender, SBI, added Rs 3,527 crore and power equipment maker BHEL added Rs 1,060 crore to their market valuation.

Top outsourcing firm Tata Consultancy Services added Rs 2,417 crore to its market cap, taking its total market valuation to Rs 1,01,892 crore at the end of the week.

Besides the top 10 firms, two private sector lenders ICICI Bank and HDFC Bank together added Rs 2,145 crore to their market valuations.

At the end of the week, the total market cap of ICICI Bank stood at Rs 82,849 crore and HDFC Bank at Rs 60,884 crore.

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