The collective market valuation of eight out of the top 10 most valuable firms declined by Rs 165501.49 crore last week with HDFC Bank suffering the most significant loss reflecting a bearish trend in domestic equities. During the same period the BSE benchmark fell by 1070.39 points or 1.30 percent. While Tata Consultancy Services (TCS) and Infosys witnessed net addition in their market valuations Reliance Industries HDFC Bank Bharti Airtel ICICI Bank State Bank of India Life Insurance Corporation of India (LIC) Bajaj Finance and Hindustan Unilever Ltd faced erosion. The valuation of Reliance Industries dropped by Rs 21516.63 crore to Rs 1931963.46 crore and that of State Bank of India eroded by Rs 18250.85 crore to Rs 707186.89 crore.  However the market valuation of TCS jumped Rs 22215.06 crore to Rs 1247190.95 crore and the mcap of Infosys climbed Rs 15578.3 crore to Rs 665318.03 crore.  The valuation of HDFC Bank tanked by Rs 47075.97 crore to Rs 1468777.88 crore. The market capitalisation (mcap) of ICICI Bank tumbled Rs 30677.44 crore to Rs 1010375.63 crore. Bharti Airtels valuation declined by Rs 15481.22 crore to Rs 1050413.33 crore and that of LIC went lower by Rs 13693.62 crore to Rs 593379.66 crore. The mcap of Bajaj Finance dipped Rs 2417.36 crore to Rs 580052.09 crore. In the top-10 list Reliance Industries Ltd remained the most valued firm followed by HDFC Bank TCS Bharti Airtel ICICI Bank State Bank of India Infosys LIC Bajaj Finance and Hindustan Unilever Ltd.  (With Inputs From PTI)