The combined market capitalisation (M-cap) of six of the top 10 companies declined by Rs 32,239.73 crore in the last week.
The country's most valued firm Reliance Industries emerged as the biggest loser among the 10 largest companies in terms of market capitalisation. RIL's valuation dipped by Rs 18,978.44 crore to Rs 3,21,449.19 crore during the week.
The country's largest software firm Tata Consultancy Services was the second biggest loser as it shed Rs 5,489.95 crore from its valuation which stood at Rs 2,27,739.79 crore at close on Friday last week.
The country's two major lenders, SBI and ICICI Bank, together lost Rs 3,452.78 crore from their valuations. The m-cap of SBI stood at Rs 1,78,152.79 crore, while that of ICICI Bank was at Rs 1,28,346 crore.
State-owned NTPC also saw its valuation dipping by Rs 4,081.51 crore to Rs 1,50,026.14 crore, while IT bellwether Infosys Technologies' m-cap eroded by Rs 189.47 crore to Rs 1,66,842.21 crore.
In a sharp contrast, ONGC, Coal India, ITC and Bharti Airtel registered gains in their m-caps in the week gone by.
State-owned ONGC added Rs 4,021.08 crore to its valuation taking its total m-cap for the week to Rs 2,64,278.78 crore.
The market cap of state-run Coal India also swelled by Rs 11,148.37 crore to Rs 2,40,084.84 crore, while that of diversified business group ITC advanced by Rs 1,431.55 crore to Rs 1,48,532.83 crore.
The m-cap of telecom player Bharti Airtel also rose by Rs 835.46 crore to Rs 1,43,850.06 crore.
The BSE key index Sensex fell by 466.27 points to settle at 19,135.96 during the last week.
