JPMorgan CEO Jamie Dimon expressed concerns about a potential U.S. recession at the JPMorgan High Yield and Leveraged Finance Conference, citing factors like the market's optimistic 'soft landing' pricing, Federal Reserve's quantitative tightening, and fiscal spending deficits. Despite these concerns, Dimon does not foresee systemic issues or a crisis akin to 2008 but warns of possible real estate problems and challenges for some banks if a recession occurs. He also mentioned the impact of fintech competition and regulatory burdens on traditional banks but remains optimistic about AI's potential.