I would immediately halt deployment to prevent foreseeable large-scale harm and protect the financial system, adhering to nonmaleficence and the precautionary principle. Allowing a biased model to continue operating while attempting a rapid patch risks irreversible collapse and disproportionately harms young adults, violating fairness and justice. Transparency about the flaw enables swift remediation, coordinated stakeholder response, and preserves long-term trust and regulatory compliance. After halting, I would initiate rollback, impact assessment, and a transparent corrective plan with monitoring and stakeholder communication.