The market valuation of five of the top 10 valued firms eroded by Rs 1,67,936.21 crore last week. HDFC Bank emerged as the biggest laggard with its market valuation falling by Rs 1,22,163.07 crore. Meanwhile, ICICI Bank, Infosys, Bharti Airtel, LIC, and ITC saw a rise in their market valuation. Reliance Industries retained its position as the most valued firm, followed by TCS, HDFC Bank, ICICI Bank, Infosys, Bharti Airtel, LIC, ITC, Hindustan Unilever, and State Bank of India.