Market cap of 9 of top-10 most valued firms plunges by Rs 2.51 lakh cr; RIL biggest laggard by ET Markets | January 25, 2026 1:07 pm | Indian Stocks, Market, News The combined market valuation of nine of the top-10 most valued firms slumped by Rs 2.51 lakh crore last week, with Reliance Industries taking the biggest hit, in line with a weak trend in equities.