The combined market valuation of five of the top-10 most-valued firms tumbled to Rs 1,85,952.31 crore last week, with HDFC Bank taking the biggest hit, in-line with a weak trend in domestic equities. Last week, the BSE benchmark slumped 1,844.2 points or 2.32 per cent, and the Nifty dropped 573.25 points or 2.38 per cent. […]