FILE PHOTO: An Estelada (Catalan separatist flag) is seen on a balcony near a Caixa bank branch in Barcelona Thomson Reuters CaixaBank and Bankia received approval from their boards to merge, creating a bank worth more than $786 billion on Friday. CaixaBank will exchange 0.6845 of its shares for one Bankia share.The new bank will operate under CaixaBank's brand and will have more 20 million customers.Visit Business Insider's homepage for more stories.CaixaBank and Spanish-state owned Bankia said on Friday they had got the greenlight from their boards to merge, creating the country's largest domestic bank.The deal will create a bank with assets of more than $786 billion.