Understanding this indicator
Interest rates do not always move together across countries or across maturities. A short-term yield can respond quickly to policy decisions while a long-term yield reflects a different mix of growth and inflation expectations. Interest Rate Structure follows the main relative pattern within the sample, complementing the view of the common interest-rate cycle.
The calculation uses each government bond yield’s change from a year earlier. After adjusting trend and variability, principal component analysis separates the strongest common movement from the next most important pattern. The current sample includes several countries’ longer-term yields as well as US yields at different maturities, so both geography and maturity matter.
In the current pattern, French and Australian ten-year yields contribute prominently on one side, while US short-term yields—especially the three-month yield—contribute on the other. A rising reading points toward the first side of this relative annual-change pattern; a falling reading points toward the second. It is therefore broader than a single country spread or the US ten-year minus three-month yield spread.
Compare the structure line with the overall rate cycle and the relevant individual yields. Is a shift mainly shared across markets, or are policy-sensitive short rates separating from longer-term rates elsewhere? Those are different economic settings even if the broad direction looks similar. Following the relative pattern helps reveal changes in financing conditions that a single benchmark yield can miss.
The green line smooths the observed structure indicator to make its broad direction easier to follow. It does not impose the fixed cycle lengths used on the overall-cycle charts. Follow sustained changes and turning points alongside the underlying markets; the height of the line is a standardised reading, not a percentage return. Historical readings may change when the model is updated with new data.