The drop in market capitalisation (m-cap) of these blue- chip companies came as the benchmark Sensex fell 0.9 per cent over last week to 20,217.39 on Friday.
The market value of IT major TCS slipped by Rs 4,907 crore to Rs 3,91,882 crore.
ITC's value dipped Rs 4,681 crore to Rs 2,44,526 crore, while the m-cap of Coal India dropped Rs 4,011 crore to Rs 1,69,120 crore.
The market cap of Reliance Industries fell by Rs 2,536 crore to Rs 2,72,662 crore, while NTPC lost Rs 1,773 crore to Rs 1,24,176 crore.
Bharti Airtel's value declined by Rs 1,099 crore to Rs 1,34,452 crore and the m-cap of Infosys fell by Rs 259 crore to Rs 1,92,328 crore.
On the other hand, ONGC added Rs 6,801 crore to Rs 2,37,970 crore, while HDFC Bank saw a rise of Rs 108 crore to Rs 1,53,672 crore.
Mortgage lender HDFC's value went up by Rs 29 crore to Rs 1,23,793 crore.
TCS continued to rule the top-10 companies' chart, followed by Reliance Industries, ITC, ONGC, Infosys, Coal India, HDFC Bank, Bharti Airtel, NTPC and HDFC.