After a year of frenzied trading and sky-high asset valuations, these are the most innovative investing companies in fintech. : After a year of frenzied trading and sky-high asset valuations, these are the most innovative investing companies in fintech. Frenzied at-home trading and sky-high asset valuations became hallmarks of the stock market's pandemic year, fueling a period of explosive growth for a crop of investing-focused fintech companies at the center of it all.