While consumer technology innovation sometimes gets the most attention, there’s a revolution going on in financial services and capital markets that is perhaps even more dynamic. And more importantly, it could offer a bigger dollars-and-cents impact on the economy of the future. Financial technology, or fintech, applications include mobile payments, blockchain technology and digital capital markets infrastructure that will help the 21st-century economy continue to thrive.It can be difficult to pick individual winners and losers in this high-octane industry, however, so for investors who simply want to play the field, here are seven fintech ETFs that offer exposure to high-tech innovation in high finance.