What is a real yield?
A real yield is the return on an investment once expected inflation over the same period is removed. To a first approximation: real yield ≈ nominal yield − expected inflation. If a 10-year bond yields 4.0% a year and the market expects average inflation of 2.2%, the real yield is about 1.8%. (The exact calculation, (1 + nominal) / (1 + inflation) − 1, gives 1.76%; the approximation is good enough for reasoning.)
For gold, the real yield matters more than the nominal yield: it measures what a risk-free investment earns in purchasing power, and therefore what you give up by holding a metal that pays nothing.
TIPS and breakevens: how the market measures it
The real yield is not just estimated; it can be observed, thanks to TIPS (Treasury Inflation-Protected Securities), US Treasury bonds whose principal is re-indexed to the consumer price index (CPI). The coupon rate is fixed but is applied to a principal that grows with inflation. A TIPS yield is therefore a real yield: what the market demands above inflation.
The gap between the yield on a nominal bond and on a TIPS of the same maturity is the breakeven inflation rate: the average inflation rate that would make the two investments equivalent. So: nominal yield = real yield + breakeven.
A caveat: the breakeven is not a pure forecast. It also contains a liquidity premium (TIPS trade less than nominal Treasuries) and an inflation risk premium. Read it as an approximate gauge of expectations, not as the truth.
Why gold is sensitive to real yields
A TIPS offers a return above inflation, backed by the US government if held to maturity. Gold offers no yield: any rise in its price is its only possible gain, and holding it even involves small storage costs. The higher the real yield, the more costly it is to forgo that return in order to hold gold. That is the opportunity cost.
Conversely, when real yields are near zero or negative, as in 2020-2021, holding gold costs almost nothing in forgone income, and may even beat an investment that loses purchasing power. Many studies have found a marked negative correlation between the 10-year real yield and gold over long windows, which explains the place of this relationship in analysts' frameworks (see also what moves the gold price).
A worked example (purely hypothetical)
The figures below are made up to illustrate the mechanism; they do not describe any real market situation. Start from a 10-year nominal yield of 4.0% and a breakeven of 2.2%, giving a real yield of about 1.8%. What happens when one of them moves?
| Scenario | 10-year nominal | Breakeven | Real yield | Usual reading for gold |
|---|---|---|---|---|
| Start | 4.0% | 2.2% | ≈ 1.8% | Reference situation |
| A. Nominal rises, expected inflation steady | 4.5% | 2.2% | ≈ 2.3% | Real yield up: usually unfavourable |
| B. Nominal steady, expected inflation rises | 4.0% | 2.5% | ≈ 1.5% | Real yield down: usually favourable |
| C. Nominal and expected inflation rise by the same amount | 4.3% | 2.5% | ≈ 1.8% | Real yield unchanged: no particular pressure |
Scenario C is the most instructive: the bond yield has risen, but the real yield has not moved. A rise in nominal rates is therefore not, in itself, bad news for gold; it depends how much of the move is down to expected inflation.
To size the opportunity cost: with 100,000 dollars (illustrative) in TIPS at a real yield of 1.8%, you earn about 1,800 dollars a year above inflation; at 2.3%, about 2,300 dollars. That extra 500 dollars is the forgone income of a gold holder moving from one scenario to the other.
The FRED series to know
The FRED database of the Federal Reserve Bank of St. Louis publishes the useful series free of charge, updated daily with a short lag.
| Series | What it measures | Use for gold |
|---|---|---|
| DFII10 | Yield on 10-year TIPS (constant maturity), i.e. the 10-year real yield | The reference series for the link with gold |
| DGS10 | Nominal yield on 10-year Treasuries (constant maturity) | Starting point: nominal = real + breakeven |
| T10YIE | 10-year breakeven inflation rate, derived from the gap between nominal and TIPS yields | Isolates the expected-inflation part of the nominal yield |
| DFII5, DGS5, T5YIE | The 5-year equivalents | More sensitive to near-term monetary policy expectations |
You can check consistency using DFII10 ≈ DGS10 − T10YIE. XAU Terminal shows US yields live and places them in the macro context of the gold market: see the gold price XAU/USD page.
How to use it without being misled
- Think in changes. Gold's moves more often follow changes in real yields than their absolute level.
- Decompose. When the nominal yield moves, check whether the breakeven or the real yield is doing the moving (scenarios A to C above).
- Watch policy shocks. Fed announcements and data such as CPI shift rate expectations, and therefore real yields, within minutes: see economic releases and gold.
- Keep maturity in mind. The 10-year is the usual benchmark, but other maturities can tell a different story.
Limits: an unstable relationship
The correlation between real yields and gold is neither constant nor a law. Several reasons:
- Decoupling phases. In some periods since 2022, gold has climbed while real yields stayed high, which many analysts attribute in part to central bank buying and geopolitical demand for protection.
- Confidence and liquidity shocks. In a crisis, safe-haven demand or forced selling can overwhelm the opportunity-cost mechanism.
- Imperfect measures. The breakeven contains liquidity and risk premia, and TIPS are subject to seasonal effects linked to CPI.
- Other drivers in parallel. The dollar, ETF flows, physical demand and speculative positioning also weigh on the price.
The real yield is therefore a useful lens, not a forecasting tool. A past correlation guarantees nothing about what comes next.