Nine of the 10 most valued companies together lost Rs 364.67 billion in market valuation last week, with SBI taking the steepest hit.
HUL was the lone gainer among the top-10 firms.
The market capitalisation (m-cap) of State Bank of India (SBI) tanked Rs 155.37 billion to Rs 2.02 trillion.
ITC's valuation slumped Rs 53.06 billion to Rs 3.12 trillion and that of Reliance Industries Ltd (RIL) tumbled Rs 48.46 billion to Rs 5.65 trillion.
The m-cap of HDFC Bank dropped Rs 46.42 billion to Rs 4.77 trillion and that of Maruti Suzuki India declined Rs 23.81 billion to Rs 2.60 trillion.
Tata Consultancy Services' (TCS) market cap eroded by Rs 17.32 billion to Rs 5.39 trillion and that of Infosys slipped Rs 11.02 billion to Rs 2.54 trillion
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The m-cap of HDFC fell by Rs 7.2 billion to Rs 2.99 trillion and that of ONGC went down by Rs 1.92 billion to Rs 2.27 trillion
In contrast, Hindustan Unilever Ltd (HUL) added Rs 1.4 billion to its valuation to reach Rs 2.81 trillion
In the ranking of top-10 firms, RIL stood at number one position, followed by TCS, HDFC Bank, ITC, HDFC, HUL, Maruti, Infosys, ONGC and SBI.
Over the last week, the BSE Sensex recorded a fall of 579.46 points, or 1.75 per cent.