Led by Reliance Industries, eight out of top 10 companies added Rs 31,000 crore to their market valuation last week, which saw the BSE benchmark index Sensex gaining over 550 points in a volatile trade.
    
Reliance Industries, the most valued company on the Bombay Stock Exchange, accounted for almost one third of the total gains. The market capitalisation of RIL rose by Rs 10,448 crore to Rs 3,30,274.86 crore last week.
    
Telecom major Bharti Airtel was the second largest gainer among the top 10 firms gaining Rs 7,328.71 crore to take its market valuation to Rs 1,13,367.20 crore last week.
    
However, the market cap of the second most valued firm, ONGC, fell by Rs 4,726.9 crore to 2,34,195.57 crore during the week ended March 6.
    
Power utility firm NTPC jumped to the third place from fifth earlier by gaining Rs 2,308.73 crore during the week.
    
Trading firm MMTC retained its fourth spot adding Rs 1,082.5 crore to its valuation. Iron ore miner NMDC fell to the fifth place from the third spot by losing a sum of Rs 6,819.28 crore from its market cap. The market valuation of MMTC stood at Rs 1,68,970.75 crore, while NMDC's valuation was Rs 1,64,336.82 crore at close on Friday last week.
    
The 30-share benchmark index Sensex gained 3.43 per cent, or 564.94 points, during the week to close at 16,994.49 points on Friday.

IT bellwether Infosys Technologies at the sixth place added Rs 1,835.32 crore to take its valuation to Rs 1,51,047.49 crore, while the largest software exporter TCS gained Rs 225.08 crore to corner the seventh slot. The market cap of TCS was Rs 1,49,168 crore at close on Friday last week.
    
Country's largest public sector lender SBI was at the eighth place as its valuation swelled by Rs 4,482.26 crore to to Rs 1,29,925.02 crore during the week.
    
Power equipment maker BHEL at the ninth place added Rs 3,642.03 crore to its market cap of Rs 1,18,784.48 crore. Bharti Airtel was at the 10th place.

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