Opinion | Danger signals from an esoteric corner of finance

King dollar is rising. Other currencies are falling like ninepins. But to gauge the impact of this surge on Asia, you have to move beyond spot exchange rates and into an esoteric corner where tens of trillions of dollars of off-balance-sheet debt lives in the accounting footnotes of banks, investors and even central banks. That corner is currency swaps. These are deals in which parties exchange funds from one currency into another and reverse the trade, say, five years later. Every three or six months, each earns a benchmark money-market…

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