For the first time ever, the Big Four U.S. banking institutions—JPMorgan Chase, Bank of America, Citigroup, and Wells Fargo—saw their combined assets exceed $10 trillion, which represents more than half the U.S. total. Mid-size banks face increasing competition from these mega banks that have been investing for over a decade in fintech solutions such as payments platforms, mobile banking, investment apps and automation of financial services and processes.