The speaker reported that the Treasury and Fed urgently summoned CEOs of systematically important banks (Citi, Morgan Stanley, BofA, Wells Fargo, Goldman) over concerns about AI-driven cyber risks from Anthropic's Mythos model. The highest-level US financial regulators are treating advanced AI-powered cyber threats as a top-tier, imminent systemic risk to the banking sector. This will compel major banks to significantly increase scrutiny, investment, and coordination around cybersecurity. This is a WATCH because the situation introduces a new, high-severity operational risk factor and potential cost center for major banks. It necessitates monitoring for regulatory guidance, bank capex plans, and any incidents that could impact stability or investor confidence in the sector. The thesis weakens if regulators deem the threat manageable with current protocols, if banks report minimal expected cost impacts, or if the AI capability is successfully contained by the limited release to trusted partners.