Jamie Dimon has a habit of warning investors, and he did it again on Oct. 13. As JPMorgan Chase (JPM) reported its third-quarter results, its CEO listed the risks he sees building beneath the surface. These include large government deficits, inflation that won’t cool, rising interest rates, global tensions, and stock prices that already look high. Coming from the head of America’s biggest bank, those warnings carry weight. They also came alongside a rare weak quarter. Excluding some one-time losses, JPMorgan earned $5.75 per share, below the $5.93 analysts expected. Revenue rose 8% to $50.9 billion, but expenses grew faster, at 12%.