Shares of fintech firms like Affirm, Robinhood, and SoFi have plummeted following the announcement of a 10% US tariff on goods, raising concerns about consumer spending and loan repayment capabilities. Affirm's stock has dropped over 21%, while Robinhood and SoFi have seen declines of 17% and 20%, respectively. The tariffs are expected to disproportionately affect lower and middle-income households, which make up a significant portion of fintech customers, potentially increasing delinquency rates and impacting revenue streams.