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– Front-end yields carry policy expectations; long-end yields carry growth, inflation and risk premium
– Currency direction follows spreads between countries, not absolute yield levels
– A rising long end with a falling currency signals capital flight rather than rate support
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Currency markets do not lead. Most of the time they follow the fixed income market, which processes the same information first and more precisely. A trader who watches only spot FX is reading the last chapter of a book that was published elsewhere.
Two ends of the curve, two different messages
The front end — roughly the two-year point — is a near-pure expression of what the market expects the central bank to do. It moves on data that changes policy expectations and it moves fast. For FX, this is the workhorse: the difference between two countries’ two-year yields is the single most useful macro input for their exchange rate.
The long end — ten years and beyond — mixes growth expectations, inflation expectations and a term premium that compensates investors for uncertainty. It responds to fiscal news, supply announcements and shifts in risk appetite as well as to policy.
Spreads, not levels
A five percent yield is neither high nor low in isolation. What matters for a currency pair is the difference between the two countries and, more importantly, the direction of that difference. A currency can weaken while its yields rise, if the other country’s yields are rising faster.
The diagnostic that catches trouble early
The most informative combination in macro is a country’s long-end yields rising sharply while its currency falls. Under normal conditions higher yields attract capital and support the currency. When both move the wrong way together, the market is demanding more compensation to hold that country’s assets at the same time as it reduces exposure — a credibility or fiscal concern rather than a rate story. These episodes tend to be more persistent and more violent than ordinary repricing.
Curve shape as a cycle signal
An inverted curve, where short yields exceed long yields, indicates that the market expects policy to be eased in future — usually because growth is expected to weaken. Re-steepening from inversion has historically coincided with the turning point in the cycle, and the manner of the steepening matters: driven by falling front-end yields it signals easing expectations, driven by rising long-end yields it signals inflation or supply concern. These two produce opposite currency outcomes.
What to put on your screen
At minimum: the two-year and ten-year yields for the United States, Germany, the United Kingdom and Japan, plus the spreads between them and the US. Watching those alongside spot will explain most FX moves that otherwise look inexplicable, and will frequently give you the move before the currency chart does.
Check the release schedule that drives these moves on our economic calendar.