The market capitalisation (m-cap) of nine of the country's top-10 firms diminished by Rs 67,964.18 crore (Rs 679.64 billion) during the week, with oil and gas major ONGC bearing the maximum brunt.

State-run ONGC saw an erosion of Rs 18,779.28 crore (Rs 187.79 billion) from its valuation, which stood at Rs 2,57,862.17 crore (Rs 2,578.62 billion) as on Friday's trade on the Bombay Stock Exchange (BSE).

Last week, shares of ONGC plunged by 87.8 points or 6.78 per cent to close at Rs 1,205.60 on BSE.

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Barring Reliance Industries (RIL), which added Rs 2,206.11 crore to its market worth stood at Rs 3,48,530.06 crore (Rs 3.48 trillion) as on Friday's trade.

The other top-10 firms saw a decline in their respective valuations, including the top lenders SBI and ICICI Bank.

SBI and ICICI Bank together emerged as the major turn-off for the broader market. These two firms together lost Rs 24,509.72 crore (Rs 245.09 billion) from their cumulative market valuations.

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The m-cap of SBI was Rs 1,65,087.88 crore (Rs 1.65 trillion), while that of ICICI Bank was Rs 1,20,371.18 crore (Rs 1.20 trillion). According to market observers fall in the m-cap of the banking majors is by and large due to fear of another rate  hike by the RBI this month.

This concern has crippled the sector as they belong to a rate sensitive arena, they added.

IT giants, TCS and Infosys Technologies together lost Rs 9,096.48 crore (Rs 90.96 billion)from their combined market valuations during the week. The m-cap of TCS stood at Rs 2,23,433.95 crore (Rs 2.23 trillion), while that of Infosys was at Rs 1,93,277.5 crore (Rs 1.93 trillion).

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With an m-cap of Rs 1,95,143.94 crore (Rs 1.95 trillion), Coal India too witnessed an erosion of Rs 3,505.58 crore (Rs 35.05 billion) from its valuation.

The state-run NTPC's valuation also dipped by Rs 3,050.82 crore (Rs 30.50 billion) to Rs 1,62,353.11 crore (Rs 1.62 trillion), while FMCG major ITC also suffered a loss of Rs 1,541.18 crore (Rs 15.41 billion) to take its valuation to Rs 1,32,926.78 crore (Rs 1.32 trillion).

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1. Reliance Industries

India's most valued company, Reliance has a market capitalisation of Rs 3,40,844.24 (Rs 3.40 trillion).

Share price: Rs 1071.40

(Figures in all slides are as on Jan 11)

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2. ONGC

After being battered last week, Oil and Natural Gas Corp's market capitalisation is down at Rs 2,55,640.13 crore (Rs 2.55 trillion).

Share price: Rs 1,195.20

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3. Tata Consultancy Services

Tata Consultancy is at third place with a m-cap of Rs 2,17,444.92 crore (Rs 1.17 trillion).

Share price: Rs 1,111.00

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4. Infosys Technologies

Infosys has further lost as markets contue to fall. Its m-cap is now Rs 1,92,806.60 crore (Rs 1.92 trilion)

Share price: Rs 3,359.00

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5. State Bank of India

State Bank of India (SBI)'s m-cap stands at Rs 1,65,255.58 crore (Rs 1.65 trillion).

Share price: Rs 2,602.45

6. NTPC

NTPC also figures among the top losers with a m-cap of Rs 1,60,126.83 crore (Rs 1.60 trillion).

Share price: Rs 194.20

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7. ITC

FMCG major ITC saw its m-cap fall to Rs 1,30,938.06 crore (Rs 1.30 trillion).

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8. Bharti Airtel

Telecom giant Bharti Airtel ranks 8th with a m-cap of Rs 1,29,742.12 crore (Rs 1.29 trillion).

Share price: Rs 341.70

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9. ICICI Bank

ICICI Bank is at the 9th position with a m-cap of Rs 1,18,144.21 crore (Rs 1.18 trillion).

Share price: Rs 1,026.60

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10. Wipro

Wipro is the third software company among the top 10 with a m-cap of Rs 1,13,552.12 Rs 1.13 trillion)

Share price: Rs 463.10