Eight of the top-10 most valued domestic firms together added Rs 1,55,603.45 crore in market valuation last week, with HDFC Bank and Tata Consultancy Services emerging as the biggest gainers, in tandem with firm trend in equities. Last week, the BSE benchmark zoomed 1,536.8 points, or 1.98 per cent, and the Nifty climbed 374.55 points, or 1.59 per cent. The BSE benchmark Sensex jumped 1,961.32 points, or 2.54 per cent, to settle at 79,117.11 on Friday. The NSE Nifty soared 557.35 points or, 2.39 per cent, to 23,907.25. From the top-10 pack, Reliance Industries and Life Insurance Corporation of India (LIC) were the laggards. The market valuation of HDFC Bank jumped Rs 40,392.91 crore to Rs 13,34,418.14 crore, the most among the top-10 firms. Tata Consultancy Services (TCS) added Rs 36,036.15 crore to Rs 15,36,149.51 crore in its valuation. The valuation of ICICI Bank soared Rs 16,266.54 crore to Rs 9,01,866.22 crore and that of Infosys surged Rs 16,189.33 crore to Rs 7,90,151.83 .