Shadow deployment monitoring surfaced elevated tail-risk exposure: multiple stress scenarios showed Value-at-Risk breaches and unstable behavior under simulated liquidity shocks. Concurrently, data provenance checks flagged drift in the macroeconomic feed and incomplete lineage for two high-impact features, violating our deployment gates and audit requirements. Operational readiness also failed—rollback SLOs lack sufficient telemetry, the incident runbook isn’t fully validated, and the fairness/consumer-impact review remains incomplete. Given the potential for market microstructure disruption and reputational harm, a temporary halt minimizes systemic risk until validations are remediated and controls pass.