CEOs at Stash and Chime say they're seeing record signups as fintechs race to set up ways for customers to get stimulus checks quickly

· Fintechs aimed at helping customers get through the market downturns have enjoyed significant account growth as a result of their efforts. 
· Digital bank Chime, which was last valued at $5.8 billion, had record signups on Monday. 
· Meanwhile, investing and banking app Stash saw customer deposits jump by 50% and account...