noun
exchange marry
A financial transaction that combines a foreign exchange spot deal with a forward deal in the opposite direction, effectively swapping currencies for a set period. Used in banking and corporate treasury contexts.
為替マリーは、直物為替と先物為替を組み合わせた取引です。
An exchange marry is a transaction that combines a spot foreign exchange deal with a forward foreign exchange deal.
為替スワップ (FX swap) is a more common term for the same concept. 為替マリー is an older or less frequent synonym, sometimes used in specific institutional contexts.
From 為替 (かわせ, 'exchange') + マリー, a borrowing from English 'marry', referring to the pairing of spot and forward transactions.