A financial services firm identifies a low-probability but catastrophic risk: a rare regional flood could destroy its primary data center, causing losses estimated at $40 million. The cost to build a geographically distant hot site to fully eliminate the exposure exceeds $30 million and is not budget-feasible. Executive leadership wants to protect the balance sheet against the financial consequences if the event occurs, without owning additional mitigation infrastructure. Which risk treatment approach best fits leadership's stated objective?