The combined market valuation of top seven companies declined by Rs 45,962.77 crore last week with IT majors - Infosys and TCS - taking the maximum hit. Barring RIL, ONGC and Sun Pharma, rest seven companies suffered losses in their market capitalisation (m-cap) for the week ended Friday. Also Read:\u00a0Market Capitalisation: Top seven companies witness erosion of Rs 32,188 cr The m-cap of Infosys dived by Rs 19,673.33 crore to Rs 2,71,223.23 crore, emerging as the worst hit among the top-10 entities. TCS valuation slumped Rs 13,773.29 crore to Rs 5,04,616.74 crore. The m-cap of HDFC plunged Rs 3,903.59 crore to Rs 1,94,515.62 crore and that of HDFC Bank dipped by Rs 2,759.6 crore to Rs 2,93,985.80 crore. ITC's valuation tanked Rs 2,454.4 crore to Rs 2,82,899.56 crore and that of HUL went down by Rs 2,261.61 crore to Rs 1,89,250.39 crore. CIL also lost Rs 1,136.95 crore to Rs 1,94,007.13 crore from its m-cap. On the other hand, RIL added Rs 5,739.13 crore to Rs 3,16,349.11 crore and ONGC (Rs 5,261.62 crore to Rs 1,86,552.46 crore). Sun Pharma's valuation also moved up by Rs 806.25 crore to Rs 1,78,480.44 crore. In the ranking of top-10 firms, TCS yet again emerged as the number one company in terms of overall valuation followed by RIL, HDFC Bank, ITC, Infosys, HDFC, CIL, HUL, ONGC and Sun Pharma. Over the past week, the BSE 30-share Sensex fell by 207.28 points to close at 26,635.75.