During the day, it hit a 52-week high of Rs 1,260.90. ING Vysya closed at Rs 816.8, up 0.32 per cent, hitting an intra-day high of Rs 849. A Prabhudas Lilladher event update report authored by Nitin Kumar and Pritesh Bumb said synergies and prices made the Kotak Mahindra-ING Vysya deal attractive. While Kotak Mahindra Bank's experience in handling stressed accounts would help deal with any asset quality issues at ING Vysya Bank, an improvement in the economy would be a key tailwind to reducing risks from stressed accounts, it added. However, not everyone believes Friday's run-up, amid hope of more mergers and acquisitions (M&As), is sustainable. Deepak Jasani, head of retail research at HDFC Securities, said the run-up in valuations made old private sector banks less attractive as takeover targets, as these were beset with issues.