The top 10 most-valued firms lost a cumulative Rs 4,986 crore in market valuation on Tuesday, with State Bank of India and Infosys Ltd. emerging as the biggest losers. SBI witnessed the steepest decline among the top 10 most valued firms, with a loss of Rs 8,121 crore, bringing its market capitalisation down to Rs 7.24 lakh crore. Similarly, Infosys Ltd saw a reduction of Rs 6,332 crore in its market cap, which now stands at Rs 7.92 lakh crore.