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Dragged down by IT bellwether TCS, the combined market valuation of top-five companies slumped Rs 65,570.45 crore last week.
While TCS, ONGC, RIL, Infosys and Sun Pharma saw losses in their market valuation, ITC, CIL, HDFC Bank, SBI and ICICI Bank made gains.
TCS, the country's largest software exporter, suffered a loss of Rs 45,883.21 crore to Rs 4,78,889.40 crore in its valuation.
The IT major had on Thursday posted 13.2% jump in September quarter net profit at Rs 5,244 crore, which failed to meet market expectations.
The m-cap of RIL tumbled Rs 7,129.98 crore to Rs 3,03,454.27 crore, while ONGC lost Rs 6,202.73 crore to Rs 3,39,866.85 crore.
Sun Pharma's valuation tanked Rs 4,338.96 crore to Rs 1,65,243.04 crore and that of Infosys diminished by Rs 2,015.57 crore to Rs 2,21,302 crore.
On the other hand, CIL added Rs 10,737.82 crore to Rs 2,22,051.79 crore in its market cap, SBI (Rs 5,300.67 crore to Rs 1,88,308.13 crore), ICICI Bank (Rs 5,284.47 crore to Rs 1,74,251.70 crore).
HDFC Bank's valuation rose by Rs 4,430.28 crore to Rs 2,13,739.94 crore and that of ITC went up by Rs 598.07 crore to Rs 2,82,208.89 crore.
In the ranking of top-10 firms, TCS maintained its numero uno position, followed by ONGC, RIL, ITC, CIL, Infosys, HDFC Bank, SBI, ICICI Bank and Sun Pharma.
Over the past week, the BSE benchmark Sensex fell by 188.85 points to settle at 26,108.53.
