Rate normality: how to tell if yields are high or low

By Flavio Melis, founder of B.U.Y. INVEST. This is educational material on a fixed-income framework, written for professional and institutional readers. It is not investment advice, a personal recommendation, or an offer of any financial service.

What rate normality means

A bond yield is not an arbitrary number set by sentiment. It can be decomposed. We read every yield through one identity: bond yield = growth expectations + inflation expectations + term premium. Read it the other way and the same number is the average overnight policy rate the market expects over the bond's life, plus a premium for locking your money up rather than rolling short bills. Rate normality is simply the question of whether that yield sits high, low, or fair once you strip inflation out and compare what is left to a durable anchor.

The anchor is the neutral real rate, written r*: the inflation-adjusted rate at which an economy runs at its non-inflationary potential — neither stimulating nor restraining. Its drivers are slow-moving — productivity growth, demographics and longevity, the level of debt, the price of capital. Falling productivity and an ageing population pull r* down, which is why a 'normal' yield today is lower than it was in the 1990s. Normality is therefore not a fixed level. It is a band that moves with structure.

Why a real yield, not a headline yield

A nominal yield tells you almost nothing on its own. A 5% yield is restrictive when inflation is 2% and deeply stimulative when inflation is 12%. So the only honest reading is the real yield — nominal minus inflation — and even there the inflation gauge matters: a trailing core measure or market-implied breakevens, never a single headline print. The 1940s make the point. Headline inflation ran into the teens while the long yield was pinned near zero, leaving real rates around minus ten to minus fifteen percent. The nominal number looked tame; the real number was extraordinary.

The question is never how high a yield is. It is how high it sits above inflation — and whether that gap is above or below the rate at which the economy can run without overheating.

Compared to r*, the verdict follows. A real yield sitting at or above its normal band, and rising, means yields are high, bonds are cheap, and policy is restrictive. A real yield below r* means yields are low, bonds are expensive, and conditions tilt toward financial repression. Pushed too far in either direction, the result is macro volatility — which is the part a portfolio has to survive.

Two ends, two different forces

The curve is not one instrument. The front end — roughly two years and in — is dominated by the central bank: current policy and the path the market expects it to take. The clean way to see that path is the overnight index swap, the purest risk-free rate, stripped of the collateral and credit noise that sit in a Treasury bill. The long end — ten to thirty years — is governed by structural growth, long-run inflation, and the term premium, and by who is structurally forced to buy: banks holding bonds as regulatory liquidity, pensions and insurers matching decades-long liabilities, reserve managers recycling export dollars.

The term premium is the pay for taking duration risk instead of rolling bills, and its size tracks uncertainty — the dispersion of growth and inflation forecasts — more than supply alone. It compressed to near zero through the 2010s and has widened again more recently. This is why the two-year and the ten-year behave like two brains: the front is arithmetic on policy; the back is a forecast of what the economy will become. Reading them as a single figure is where most confusion begins.

How we use it

Within the Basic Strategy, this read is an input, not a forecast. It informs how we size our own interest-rate exposure across the portfolio's government-duration and inflation-linked sleeves: we are more willing to hold duration when long real yields sit at or above their normal band, and we trim it when real yields fall below r*. It is the same discipline that runs through our equity work — start from where the price actually sits, not from where the story wants it to be. And it pairs with a related conviction: a credit spread is mostly equity risk in disguise, so the genuine diversifiers are government duration, gold, and volatility, not corporate yield — the argument set out in a high yield is not diversification.

None of this is a market call, and none of it promises an outcome. It is a way to stay oriented: to know whether you are being paid to own duration or merely tempted by a number. The strategy was actively managed through the 2020 global market dislocation and the 2022 interest-rate tightening cycle, across materially different regimes; in 2022, as a 60/40 reference portfolio fell roughly 10% on the year, the strategy finished the year modestly higher. Past performance is not indicative of future results. The point is not the figure but the posture behind it — judge the rate, not the headline.