What Are Inflation Expectations

Inflation expectations are the value that households, firms, and investors expect for how much prices will rise going forward. The key is that it is not "prices that have already risen" but "prices believed to rise in the future."

Why does this matter? Because expectations create reality. If people believe prices will rise, firms raise prices in advance, workers demand higher wages, and consumers buy ahead before prices go up. These behaviors actually push prices up. So central banks (the Fed, the Bank of Korea) regard it as an important duty to manage inflation expectations so that they stay "anchored" near the target (usually 2%).

The most widely used market-based measure is the breakeven inflation rate (BEI). The calculation is surprisingly simple.

BEI = ordinary Treasury yield − inflation-linked Treasury (TIPS) yield

An ordinary Treasury pays a fixed amount as-is, while an inflation-linked Treasury increases the principal by the amount prices rise. So the inflation rate that makes the two bonds "equally attractive" — that is, the inflation rate the market expects on average going forward — is precisely the BEI. The U.S. 10-year BEI was about 2.2% as of July 2026, and stayed stably in roughly the 2.2–2.3% range throughout 2025–2026. This means the market sees "prices rising a little over 2% a year over the next 10 years."

Another method is simply to ask people directly. A representative one is the University of Michigan Surveys of Consumers. Each month it asks about 600 households how much prices are likely to rise "over the next 1 year" and "over the next 5–10 years" and averages the responses.

Surveys do have a known habit, though. Michigan respondents have historically tended to expect higher inflation than actually occurs (an upward bias). This is because the shopping-basket prices people feel come across as inflated relative to the official figures. So experts look at the market measure (BEI) and surveys together to offset each other's weaknesses.

Inflation expectations are the foundation of interest rates. The nominal interest rate can roughly be seen as "the real interest rate + inflation expectations," so when expectations rise, rates tend to rise too. When rates rise, bond prices and stock valuations can be pressured.

It also matters when thinking about the real return. Even if your investment return is 5% a year, if inflation expectations are 4%, your real return in purchasing-power terms is a little over 1%. Here you can see why a "real" perspective that accounts for the erosion of money's value matters to a long-term investor. That said, this measure is not magic for predicting the future; it is merely a window for reading "the current state of mind of the market and the public."