Fortune directly quotes Dimon saying 'We're in a bull market. It's like a little tsunami. When that kind of thing happens, it's very hard to stop,' and Yahoo Finance corroborates the same characterization. The core claim that Dimon described the economy as a bull market 'like a tsunami' is accurate. The only caveat is the claim's interpretive framing of 'continued optimism'—Dimon actually delivered this in a cautious, worried tone about geopolitical headwinds, so the metaphor signals unstoppable momentum rather than pure optimism.