Nine of the top 10 blue-chip firms together lost Rs 47,562 crore in market capitalisation (m-cap) last week, with TCS and CIL taking the steepest hit.
While TCS, RIL, ITC, ONGC, Infosys, CIL, HDFC Bank, Bharti Airtel and HUL suffered losses in market valuation, NTPC was the only company that stood out with gains.
IT major TCS' m-cap tanked by Rs 13,133 crore to Rs 3,96,789 crore, making it the biggest loser among the top 10 firms.
State-run Coal India's market capitalisation plunged by Rs 10,833 crore to Rs 1,73,131 crore, while the value of RIL tumbled by Rs 7,674 crore to Rs 2,75,198 crore.
The valuation of ONGC slipped by Rs 6,074 crore to Rs 2,31,169 crore, while ITC lost Rs 4,082 crore to Rs 2,49,207 crore and HDFC Bank's m-cap fell by Rs 2,632 crore to Rs 1,53,564 crore.
Bharti Airtel saw its market value diminish by Rs 1,959 crore to Rs 1,35,551 crore, HUL's m-cap went down by Rs 963 crore to Rs 1,25,493 crore and Infosys lost Rs 212 crore to Rs 1,92,587 crore.
In contrast, NTPC added Rs 124 crore to Rs 1,25,949 crore in its valuation.
The top 10 companies' chart was ruled by TCS, followed by RIL, ITC, ONGC, Infosys, CIL, HDFC Bank, Bharti, NTPC and HUL.
Over the last week, the Sensex made its second consecutive weekly loss as it fell 266.73 points or 1.29 per cent.