Dragged down by ONGC and Coal India, the combined market capitalisation (m-cap) of the top six Sensex companies plunged by Rs 15,825 crore last week.
While the market values of ONGC, ITC, CIL, HDFC Bank, SBI and NTPC dipped, RIL, TCS, Infosys and ICICI Bank's valuations surged in a flattish stock market past week.
The market capitalisation of state-owned ONGC declined by Rs 7,571 crore to Rs 2,27,319 crore, taking the steepest hit in the domestic market valuation chart. The m-cap of Coal India, another PSU, eroded by Rs 2,811 crore to Rs 2,21,356 crore.
The valuation of ITC tanked by Rs 1,807 crore to Rs 2,22,843 crore, SBI's m-cap fell by Rs 1,389 crore to Rs 1,44,442 crore, and HDFC Bank lost Rs 1,381 crore to finish the week at Rs 1,48,996 crore.
Besides, NTPC saw an erosion of Rs 866 crore from its m-cap, which stood at Rs 1,38,482 crore.
Among companies that saw an increase in m-cap. Infosys added Rs 3,462 crore to its market value, which was at Rs 1,37,192 crore. Bigger rival TCS's value surged by Rs 3,435 crore to Rs 2,60,535 crore.
The m-cap of RIL rose by Rs 2,864 crore to Rs 2,61,382 crore, ICICI Bank's valuation moved up by Rs 110 crore to Rs 1,24,438 crore.
In the list of top-10 most valued firms, RIL was at the No. 1 slot, followed by TCS, ONGC, ITC, CIL, HDFC Bank, SBI, NTPC, Infosys and ICICI Bank. The market capitalisation or market value of a listed company is arrived at by multiplying the total number of its shares with its stock price on a particular day or time. This figure changes in step with the change in stock price.