Five of the top-10 most-valued firms added Rs 1,99,111.06 crore in market valuation last week, with Reliance Industries emerging as the biggest gainer, in-tandem with bullish sentiments. Last week, the BSE benchmark jumped 542.3 points or 0.75 per cent. Benchmark equity indices Sensex and Nifty surged over 1 per cent to hit their fresh all-time highs on Friday. While Reliance Industries, Tata Consultancy Services (TCS), ICICI Bank, Infosys and Bharti Airtel were the gainers from the top-10 pack, HDFC Bank, Hindustan Unilever, ITC, State Bank of India and Life Insurance Corporation of India (LIC) were the laggards, taking a combined hit of Rs 76,098.67 crore. Reliance Industries added Rs 90,220.4 crore taking its market valuation to Rs 18,53,865.17 crore. The valuation of TCS jumped Rs 52,672.04 crore to Rs 14,20,333.97 crore. Shares of Tata Consultancy Services climbed nearly 4 per cent on Friday after the company reported an 8.2 per cent growth in net income for the December quart