For inflation forecasting, maturities should be aligned with the forecast horizon; for example, the 5Y–1Y spread reflects inflation expectations over the next five years relative to the next year. For forecasting economic activity, the preferred measure is the spread between a long-term rate, typically the 10-year yield, and a short-term rate. Where standard tenors are unavailable, the same principle can be adapted by using the difference between the longest and shortest points available on the curve. Major broad spreads tend to move together, so substituting one for another does not materially change the overall signal.