Dragged down by IT majors TCS and Infosys, the combined market valuation of top four Sensex companies declined by Rs 41,564 crore last week.
While TCS, Infosys, Coal India and Wipro saw losses in their market capitalisation (m-cap) for the week ended March 14, others, including RIL, ONGC and ITC, made gains.
Infosys' value plunged Rs 20,184 crore to Rs 1,94,634 crore, taking the biggest hit among the top-10 companies in the domestic market capitalisation chart.
The m-cap of TCS tumbled Rs 16,443 crore to Rs 4,19,393 crore, while Wipro lost Rs 4,558 crore to Rs 1,34,901 crore.
Similarly, Coal India's value fell by Rs 379 crore to Rs 1,66,657 crore.
In contrast, among the gainers, ITC added Rs 7,509 crore to Rs 2,75,724 crore in its m-cap, while the value of ONGC surged Rs 6,203 crore to Rs 2,76,085 crore.
The market cap of RIL rose by Rs 5,526 crore to Rs 2,86,378 crore, while HDFC Bank's valuation zoomed Rs 4,879 crore to Rs 1,75,412 crore.
ICICI Bank added Rs 1,418 crore to Rs 1,40,141 crore and mortgage lender HDFC saw its m-cap climb Rs 1,308 crore to Rs 1,33,655 crore.
TCS retained its flagship position at the top, followed by RIL, ONGC, ITC, Infosys, HDFC Bank, CIL, ICICI Bank, Wipro and HDFC.
Over the last week, the BSE 30-share benchmark Sensex lost 0.5 per cent or 109.99 points to settle at 21,809.80 on Friday March 14.