Led by SBI, seven of the 10 most valued Sensex companies saw a dip of Rs 28,760 crore in their combined market capitalisation (m-cap) in last week's trading.
The country's top, state-owned lender SBI shed Rs 8,217 crore from its m-cap which was Rs 1,35,321 crore on Saturday.
Coal India's value dropped Rs 7,200 crore to Rs 2,21,799 crore, becoming the second biggest loser in the list.
Bharti Airtel shed Rs 6,512 crore from its m-cap, which stood at Rs 1,16,584 crore, while NTPC's value diminished Rs 2,515 crore to Rs 1,33,947 crore.
ONGC lost Rs 1,968 crore in value to reach Rs 2,25,736 crore; HDFC Bank - Rs 1,805 crore at Rs 1,27,353 crore and Infosys - Rs 543 crore at Rs 1,37,631 crore.
In contrast, RIL, TCS and ITC saw spurt in their m-cap.
TCS was the biggest gainer as its m-cap advanced by Rs 22,224 crore to reach Rs 2,35,443 crore, while RIL's value jumped Rs 2,767 crore at Rs 2,42,283 crore and ITC added Rs 1,134 crore to its valuation which was Rs 1,92,919 crore.
Last week, TCS posted a healthy 21.9% rise in net profit for 2011-12 at Rs 10,638.2 crore and said it is on track to outperform the industry revenue growth of 11-14% set by industry body Nasscom for 2012-13.
It also became the first Indian IT company to cross the 10 billion dollar milestone, posting annual revenues of $10.17 billion in 2011-12.
Shares of the company soared over 10% last week.
RIL was at the top position, followed by TCS which toppled CIL to grab the second position. ONGC was at third spot, followed by ITC, SBI, Infosys, NTPC, HDFC Bank and Bharti in that order.
During the week, the BSE benchmark index Sensex fell by 1% to 17,187.34.