The combined market valuation of three of India's top-10 most valued firms witnessed a significant jump of ₹75,855.43 crore in a holiday-shortened trading week ending around January 18, 2026. State Bank of India (SBI) emerged as the leading gainer, with its market valuation increasing by ₹39,045.51 crore. Infosys followed, adding ₹31,014.59 crore to its market capitalization. ICICI Bank also contributed positively, with its valuation rising by ₹5,795.33 crore. This upward movement for these three firms occurred amidst an otherwise sluggish trend in the broader Indian equity markets, where the BSE benchmark Sensex dipped marginally by 5.89 points and the NSE Nifty saw a modest gain of 11.05 points. Conversely, seven other prominent firms among the top-10 most valued, including Reliance Industries, HDFC Bank, Tata Consultancy Services (TCS), Bharti Airtel, Bajaj Finance, Hindustan Unilever, and Larsen & Toubro, collectively experienced an erosion of ₹75,549.89 crore from their valuations. Notably, Reliance Industries' market cap declined by ₹23,952.48 crore, and Larsen & Toubro's valuation dropped by ₹23,501.8 crore. Despite these varied movements, the combined market cap addition by SBI, Infosys, and ICICI Bank slightly surpassed the total erosion faced by the other seven firms. The news highlights specific company-level performance within a relatively flat overall market.