This story was originally published on Payments Dive. To receive daily news and insights, subscribe to our free daily Payments Dive newsletter. Dive Brief: Capital One Financial said Thursday it will buy the tech startup Brex for $5.15 billion in cash and stock, giving the bank an established financial technology company that integrates cards, payments and banking in a single offering. “Since our founding, we set out to build a payments company at the frontier of the technology revolution,” Capital One ...