The combined market valuation of four of the top 10 most-valued firms declined by ₹1,25,397.45 crore last week, reflecting weak investor sentiment at Dalal Street. The BSE benchmark index fell by 428.87 points (0.55%), while the Nifty dipped by 111 points (0.47%) during the week. Major Losers: Reliance Industries Takes the Biggest Hit Reliance Industries recorded …