The combined market valuation of seven of the top-10 most valued firms surged by Rs 1,28,281.52 crore last week, with Reliance Industries and Bharti Airtel emerging as the biggest gainers, in line with a positive trend in equities. Last week, the BSE benchmark jumped 669.14 points or 0.79 per cent. While Reliance Industries, HDFC Bank, Bharti Airtel, Tata Consultancy Services (TCS), State Bank of India, Infosys and Hindustan Unilever were the gainers, Bajaj Finance, Life Insurance Corporation of India (LIC) and ICICI Bank faced erosion in their valuation. The market valuation of Reliance Industries jumped by Rs 36,673 crore…