The Intervention Nobody Coordinated
The first joint US–Japan yen operation since 2011 moved the yen ~5% off its peak — and, per the FT, was partly funded by selling euros, with the ECB informed only afterwards.
What changed
Washington and Tokyo confirmed a coordinated yen-buying operation — the first since 2011. USDJPY moved from 163.7 to roughly 155, about 5% off the peak, within days. The Financial Times subsequently reported that part of the US operation was funded by selling euros, and that the ECB was informed only after the fact.
The mechanism
One capital's currency fix became another's problem: the euro absorbed an adjustment it never agreed to. Every treasury desk now has to price the possibility that the next intervention, too, arrives without consultation — a risk premium on coordination itself.
Why it matters
Most FX hedging rests on an assumption so basic it is rarely written down: that reserve-currency policy is coordinated between the major central banks. That assumption failed in public this week. A hedge built on coordination is exposed the day coordination stops.