Yield Spreads: The Pair's Hidden Companion Chart

[Fairman]

Yield Spreads: The Pair's Hidden Companion Chart

One of the most useful companion charts for a currency pair is the difference between the government bond yields of the two countries. This is the yield spread.

For EUR/USD, a common choice is the US two-year Treasury yield minus the German two-year yield. When the spread widens in favor of the United States, meaning US yields rise faster, the dollar often strengthens against the euro. When it narrows, EUR/USD often rises.

The logic is the flow of capital. Investors move money toward higher returns, adjusting for risk. A shift in the yield gap changes the incentive to hold each currency.

Not every move in the pair matches the spread. Risk sentiment, positioning, and other events interfere. At times, the correlation weakens or even reverses. But when price and spread diverge sharply, it raises a question: which one is wrong, or what has changed?

A divergence can be an early clue. If EUR/USD keeps falling while the spread stabilizes, the pair may be getting stretched. If the spread turns first, price often follows.

Spreads are available for most major pairs using appropriate government bonds: UK gilts for GBP, Japanese government bonds for JPY, and so on.

Use the spread as context, not a timing tool.

Practical step: chart a pair and its two-year yield spread together over the last six months and mark the periods where they diverged.

[Fairman]

Practical setup that works for me: put the two-year spread in a separate pane under the pair, same timeframe, and look at it on the daily. Anything lower than daily and it's mostly noise.

[Fairman]

Worth saying the relationship breaks down in risk-off panics. Money runs to the dollar or yen regardless of what the spread says, so when markets are scared I give the spread less weight.