Few companies have suffered as much from the Federal Reserve's interest rate campaign as Upstart (UPST -3.39%). Shares of the AI-based consumer lending company have fallen as much as 97% from peak to trough and are still down more than 90% from their peak in 2021. During the heady days of the pandemic, Upstart was growing at a blistering pace with revenue more than tripling, and it reported mid-teens profit margins even on a generally accepted accounting principles (GAAP) basis. However, the Fed's rapid int ...