Why the Fed Watches PCE, Not CPI — and What July’s Hotter Reading Means

What actually happened

Every month, the US Bureau of Economic Analysis publishes the Personal Consumption Expenditures price index — PCE for short. It is the Federal Reserve’s preferred measure of inflation. On 26 August 2026, the Bureau released the July reading: headline PCE rose 0.2% from June, putting the annual rate at 3.7%. That was one-tenth of a percentage point above what economists had forecast.

Core PCE — which strips out volatile food and energy prices — also rose 0.2% on the month and stood at 3.3% year-on-year, in line with expectations, as CNBC reported.

A miss of just 0.1 percentage point might not sound like much. But because this is the number the Fed watches most closely — and because it landed the same week as the Jackson Hole central bank symposium and Nvidia’s earnings report — traders were paying particularly close attention. The slight overshoot was enough to move interest-rate expectations for the September policy meeting.

What is PCE and how is it calculated?

PCE stands for the Personal Consumption Expenditures price index. It measures how much prices have changed for goods and services purchased by US households — things like food, healthcare, housing, transport, clothing, and entertainment. The Bureau of Economic Analysis calculates it from a wide range of data sources, including business surveys and tax records, covering not just what people buy for themselves but also spending made on their behalf, such as health insurance premiums paid by employers.

Each month, it produces an overall (headline) inflation rate and a core rate. Both are expressed as annual percentage changes: how much more expensive the same basket of goods is compared with the same month a year ago. July’s headline reading of 3.7% means the basket costs 3.7% more than it did in July 2025.

PCE vs CPI: what is the difference?

Most people have heard of the Consumer Price Index — CPI — and may have come across it when looking at why the US inflation report moves markets. Both PCE and CPI measure the same basic thing: the cost of goods and services over time. So why does the Fed use PCE instead of CPI?

There are three main reasons.

1. PCE adjusts for substitution

CPI tracks a fixed basket of goods defined at the start of each year. If the price of beef rises sharply, the index captures that rise in full — even though many households might respond by eating more chicken instead. PCE has a more flexible basket: it is updated more frequently to reflect actual spending patterns. So if people shift away from expensive items towards cheaper alternatives, PCE picks that up and its reading is adjusted accordingly. This makes PCE a slightly more realistic guide to the true cost of living as it is actually lived.

2. PCE has broader coverage

CPI is based mainly on surveys of households asking what they bought. PCE draws on much broader data, including what businesses spent on behalf of consumers — the biggest example being healthcare. In the United States, a large portion of healthcare costs is paid by employers or the government rather than individuals directly. CPI captures what households pay out of pocket for healthcare; PCE captures total healthcare spending, giving it a much larger weight for this category. Since healthcare is one of the largest and fastest-growing parts of the US economy, this difference is significant.

3. PCE has historically been a more stable guide

Over decades of data, PCE readings have tended to run slightly below CPI — partly because of the substitution effect — and have proven to be a more consistent indicator of underlying inflation trends. The Federal Reserve finds it gives a cleaner signal when setting policy, which is why the central bank formally adopted it as its primary inflation target in 2012, aiming to keep PCE at 2% over time.

Feature	CPI	PCE
Published by	Bureau of Labor Statistics	Bureau of Economic Analysis
Basket	Fixed (updated annually)	Flexible (adjusts for substitution)
Healthcare	Out-of-pocket only	All healthcare spending
Tends to read	Higher	Lower (by ~0.3–0.5pp historically)
Fed’s target gauge?	No	Yes (2% target)

Why 3.7% matters — and what “hotter than expected” means

The Fed’s target is 2% PCE. July’s reading of 3.7% is well above that — nearly twice the target. And crucially, it came in above the 3.6% that economists had forecast.

In financial markets, the surprise matters as much as the number itself. When data comes in exactly as expected, markets often barely move because traders had already priced it in. When data surprises to the upside — hotter inflation than expected — it forces a reassessment. If inflation is stickier than thought, the Fed may need to keep interest rates higher for longer, or even raise them further.

That is exactly what happened on 26 August. The probability of a rate hike at the Fed’s September 15–16 meeting, as measured by CME Group’s FedWatch tool, rose from around 33% to roughly 40% in the hours after the data was published, according to Wolf Street.

The Fed’s current position

The Federal Reserve, now led by Chair Kevin Warsh (confirmed by the US Senate in May 2026), currently holds its main interest rate at 3.50%–3.75%. That is significantly higher than the near-zero rates of a few years ago, and reflects the battle the central bank has been fighting to bring inflation back to its 2% target.

Understanding what interest rates do to shares is an important part of any investor’s toolkit. Higher rates make borrowing more expensive for companies, reduce consumer spending on credit, and make bonds more attractive relative to equities. Each time the probability of a rate change shifts, share prices tend to react — especially for interest-rate-sensitive sectors like property, utilities, and technology.

The July PCE data did not guarantee a rate hike in September. It simply made one slightly more likely than it was the week before. Whether the Fed moves in September will depend on the August inflation data (due mid-September), the jobs market, and signals given by Warsh and other Fed officials at Jackson Hole and in speeches afterwards.

Core PCE: the number inside the number

You will often hear commentators focus on core PCE rather than headline PCE. Core PCE removes food and energy prices from the calculation. Why? Because those two categories can move sharply due to factors that have nothing to do with underlying economic conditions — a harsh winter, a drought, a disruption in oil supply.

If food and energy prices spike temporarily and then reverse, the headline PCE rate can swing up and down in ways that do not tell the Fed much about whether persistent, structural inflation is a problem. Core PCE strips those swings out, leaving a cleaner view of how fast prices are rising across the rest of the economy.

In July 2026, core PCE came in at 3.3% year-on-year — in line with forecasts, and unchanged from June. That in-line reading provided some reassurance that underlying inflation was not accelerating. The slightly hotter headline reading was driven mainly by energy prices. That combination helped explain why markets did not panic: the underlying picture was broadly stable, even if the headline surprised.

What this means for Student Investor participants

If you are running a virtual portfolio on Student Investor, the PCE data is worth understanding for a practical reason: it directly affects the rate environment in which the shares you hold operate.

When PCE reads hotter than expected, several things can happen to share prices:

• Technology and growth stocks often fall. Their valuations depend heavily on future earnings discounted back to the present, and higher interest rates make those future earnings worth less today.
• Banks and financial services can sometimes benefit from higher rates, since they can charge more on loans. But if rate fears trigger a wider market sell-off, banks often fall too.
• Defensive sectors (utilities, consumer staples, healthcare) tend to hold up better, since their revenues are relatively stable regardless of the rate environment.
• Property companies (REITs) are particularly sensitive to rates, since they borrow heavily to finance assets and their dividend yields look less attractive when bonds offer more.

None of this is a guarantee — markets are complex and many factors move at once. But understanding the link between inflation, rate expectations, and sector performance is a core skill for any investor. Reviewing your virtual portfolio through this lens after each major data release is good practice.

What to watch next

The key dates to follow after the July PCE reading:

• August PCE (due late September) — will inflation stay sticky at 3.7%, or does it start to pull back towards 3.5%? A further surprise to the upside would significantly increase the chance of a rate hike later in 2026.
• September FOMC meeting, 15–16 September — the next decision point. Chair Warsh’s press conference will be watched closely for signals about the path of rates into the rest of the year.
• US jobs report (September) — a strong labour market tends to support inflation, while a softer one gives the Fed more room to pause.

The broader lesson here is one of the most valuable in investing: data rarely speaks in a single clear voice. July’s headline PCE was slightly hot, but core was in line. Consumer confidence fell that same week, suggesting economic uncertainty. Nvidia reported strong earnings while rate expectations shifted hawkish. Investors are always reading several signals at once, weighing them against each other, and updating their views. That is precisely the skill the Student Investor Challenge is designed to build. You can see a related example in our piece on what the August consumer confidence fall tells investors.

FAQ

What is PCE inflation?

PCE stands for the Personal Consumption Expenditures price index. It is published monthly by the US Bureau of Economic Analysis and measures how much prices have changed for goods and services bought by US households. Unlike the Consumer Price Index (CPI), PCE adjusts its basket of goods as spending habits change and uses broader data sources, making it the Federal Reserve’s preferred measure of inflation. The Fed targets a PCE rate of 2% over time.

Why does the Fed prefer PCE over CPI?

The Fed prefers PCE for three main reasons. First, PCE adjusts its basket when consumers switch to cheaper alternatives — if beef prices rise and people buy more chicken, PCE reflects that substitution while CPI largely does not. Second, PCE draws on more comprehensive spending data, including healthcare paid by employers. Third, historical PCE readings have proven to be a more stable and reliable guide to underlying inflation trends over time.

How does the July 2026 PCE reading affect interest rates?

The July 2026 headline PCE of 3.7% came in above the forecast of 3.6%, meaning inflation was not cooling as quickly as markets expected. This increased the probability that the Federal Reserve might raise interest rates at its September 15–16 meeting, with market-implied odds of a hike rising to around 40% from 33% the week before. Higher rates tend to weigh on share prices, particularly in technology and property sectors.

What is core PCE and why does it matter?

Core PCE strips out food and energy prices, which can swing sharply due to weather and commodity markets. Core PCE gives a cleaner picture of underlying, persistent inflation. In July 2026 it came in at 3.3% year-on-year, in line with forecasts. The Fed watches core PCE particularly closely because it is a better guide to where inflation is heading over the coming months than the headline figure.