Newton understood gravity better than anyone alive. Yet in 1720, he famously lost a significant portion of his fortune in the South Sea Bubble, a speculative frenzy in Britain where share prices of the South Sea Company skyrocketed before collapsing.
Despite his intellect, Newton allowed market speculation and emotion to override his usual discipline, demonstrating that even the brightest minds are not immune to bias, conviction, or the sway of sentiment.
In high-stakes treasury and FX decisions, emotion is the hidden risk.