The combined market valuation of seven of the top-10 most valued Indian firms eroded by ₹88,635.28 crore in the week ending November 7. M-cap of Airtel tumbled ₹30,506.26 crore, while that of Reliance Industries and Hindustan Unilever dropped by ₹11,164.29 crore and ₹12,253.12 crore, respectively. TCS faced an erosion of ₹23,680.38 crore from its valuation, which stood at ₹10,82,658.42 crore.