Invest News DetailVatan - Turkish banks climb in value as well as prestige with their performance during the global financial crisis. Undamaged by the economic turmoil, 11 banks from Türkiye take their place in the “Top 500 in Global Banking” list of the London-based consultancy group Brand Finance. Three Turkish banks, Isbank, Akbank and Garanti, have entered the world’s 100 most valuable banks ranking, leaving behind many well-established international banking corporations. Brand Finance rated Garanti and Akbank AAA - or “extremely strong”, and Isbank AA or “very strong”.