IT counters surged up to 14% on a rub-off impact from Infosys and Tata Consultancy Services (TCS) while the Nifty IT index also hit a fresh 52-week high of 36,482.25. In the largecap pack, the top gainer was Infosys which soared 8% to the day's high of Rs 1,613.65 on the NSE. TCS, meanwhile, gained 4.2% to attain the day's high of Rs 3,894. Their smaller peers Cyient and Firstsource Solutions rose 6% and 14%, respectively. Other IT stocks including Mphasis, Coforge, Tech Mahindra, Wipro, LTIMindtree, Persistent Systems, HCL Technologies, and L&T Technology Services (LTTS) were also up.