Robinhood, Upstart, and Affirm are positioned to head higher.Many fintech stocks stumbled in 2022 and 2023 as inflation and rising interest rates curbed consumer spending, cooled the stock and crypto markets, and drove investors toward more conservative investments. But the Federal Reserve finally cut its benchmark rates in September as inflation cooled off.As interest rates decline, it might be smart to buy a few out-of-favor fintech stocks that have resilient business models but are still trading far belo ...