The Yen Just Became Everyone's Problem

When local becomes global

The latest intervention may look like a local currency story, but the yen sits at the heart of the global carry trade. When the world's primary funding currency moves, the consequences rarely stay confined to FX.

Carry trades thrive when volatility is low, funding costs are stable, and central banks are predictable. They also tend to unwind much faster than they build. As the yen strengthens, leveraged investors are often forced to reduce risk across EM currencies, AI and other high-beta equities, credit and volatility, making USD/JPY one of the market's most important macro gauges.