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CPI Inflation Slows but Some Data Are Missing from Latest Report

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On Thursday (December 18) the Bureau of Labor Statistics (BLS) released its latest report on the consumer price index (CPI). The federal government shutdown, which lasted from October 1 to November 12, is still affecting the macroeconomic statistics being gathered by the BLS and other agencies. The BLS notes in the report:

“BLS did not collect survey data for October 2025 due to a lapse in appropriations. BLS was unable to retroactively collect these data. For a few indexes, BLS uses nonsurvey data sources instead of survey data to make the index calculations. BLS was able to retroactively acquire most of the nonsurvey data for October. CPI data collection resumed on November 14, 2025.”

The following table from the CPI report gives an indication of how much data that is normally collected wasn’t collected in October or November.

Bearing in mind the missing data, the following figure compares headline CPI inflation (the blue bar) and core CPI inflation (the red bar) as reported in this month’s CPI report.

The headline inflation rate, which is measured by the percentage change in the CPI from the same month in the previous year, was 2.7 percent in November, down from 3.0 in September.
The core inflation rate, which excludes the prices of food and energy, was 2.6 percent in November, down from 3.0 percent in September.

Economists who were surveyed by Fact Set had forecast that both headline inflation and core inflation would rise to 3.1 percent in November. Economists surveyed by the Wall Street Journal also forecast that headline inflation would rise to 3.1 percent in November, but forecast that core inflation would rise slightly less to 3.0 percent. It’s unclear whether the economists were aware at the time they were surveyed how much data for October and November would be missing from this month’s report.

Because of how much data that is normally collected was missing from the calculations of November’s inflation rate, the results should be treated with caution. The Wall Street Journal quoted an economist at the investment bank UBS as advising: “I think you largely just put this one to the side. Maybe this report gives a minor downward sign for overall inflation, but the vast, vast majority of this is just noise and should be ignored.”

Several economists were concerned about the computation the BLS had to make to deal with the lack of direct data on the price of “shelter.” The price of shelter in the CPI, as explained here, includes both rent paid for an apartment or a house and “owners’ equivalent rent of residences (OER),” which is an estimate of what a house (or apartment) would rent for if the owner were renting it out. OER is included in the CPI to account for the value of the services an owner receives from living in an apartment or house. The following figure shows CPI inflation, measured as the percentage change since the same month in the previous year, leaving out the price of shelter. Measured this way, inflation was 2.6 percent in November, which is slightly lower than the 2.7 percent inflation rate the BLS reported when including all items.

What effect have the tariffs that the Trump administration announced on April 2 had on inflation? (Note that many of the tariff increases announced on April 2 have since been reduced.) The following figure shows 12-month inflation in durable goods—such as furniture, appliances, and cars—which are likely to be affected directly by tariffs, and services, which are less likely to be affected by tariffs. To make recent changes clearer, we look only at the months since January 2022. In November, inflation in durable goods decreased to 1.8 percent from 2.2 percent in September. Inflation in services in November was 3.2 percent, down from 3.6 percent in September. So the upward pressure on goods prices from the tariffs seems to be declining. But, again, missing data makes it’s unclear to what extent November inflation numbers are representative of what’s actually happening currently to prices.

It’s unlikely that this inflation report will have much effect on the views of the members of the Federal Reserve’s policymaking Federal Open Market Committee. In a press conference after the committee’s most recent meeting, Fed Chair Jerome Powell cautioned against drawing firm conclusions from data for October and November:

“I should mention on the data, as long as I’m talking about it, that we’re going to need to be careful in assessing particularly the household survey data. There are very technical reasons about the way data are collected in some of these measures, both in, you know, inflation and in labor—in the labor market so that the data may be distorted. And not just sort of more volatile, but distorted. And that—it’s—and that’s really because data was not collected in October and half of November. So we’re going to get data, but we’re going to have to look at it carefully and with a somewhat skeptical eye by the time of the January meeting ….”

CPI Inflation Worsens, as Expected

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Today (September 11), the Bureau of Labor Statistics (BLS) released its report on the consumer price index (CPI) for August. The following figure compares headline CPI inflation (the blue line) and core CPI inflation (the red line).

The headline inflation rate, which is measured by the percentage change in the CPI from the same month in the previous year, was 2.9 percent in August, up from 2.7 in July.
The core inflation rate, which excludes the prices of food and energy, was 3.1 percent in August, up slightly from 3.0 percent in July.

Headline inflation and core inflation were both the same as economists surveyed had expected.

In the following figure, we look at the 1-month inflation rate for headline and core inflation—that is the annual inflation rate calculated by compounding the current month’s rate over an entire year. Calculated as the 1-month inflation rate, headline inflation (the blue line) jumped from 2.4 percent in July to 4.7 percent in August. Core inflation (the red line) increased from 3.9 percent in July to 4.2 percent in August.

The 1-month and 12-month inflation rates are both indicating that inflation accelerated in August. Core inflation—which is often a good indicator of future inflation—in particular has been running well above the Fed’s 2 percent inflation target during the last two months.

Of course, it’s important not to overinterpret the data from a single month. The figure shows that the 1-month inflation rate is particularly volatile. Also note that the Fed uses the personal consumption expenditures (PCE) price index, rather than the CPI, to evaluate whether it is hitting its 2 percent annual inflation target.

Core inflation had been running significantly higher than headline inflation in the past few months because gasoline prices had generally been falling since February. Gasoline prices turned around in August, however, increasing at a 25.5 percent annual rate. As shown in the following figure, 1-month inflation in gasoline prices moves erratically—which is the main reason that gasoline prices aren’t included in core inflation.

Does the increase in inflation represent the effects of the increases in tariffs that the Trump administration announced on April 2? (Note that many of the tariff increases announced on April 2 have since been reduced) The following figure shows 12-month inflation in durable goods—such as furniture, appliances, and cars—which are likely to be affected directly by tariffs, and services, which are less likely to be affected by tariffs.. To make recent changes clearer, we look only at the months since January 2022. In August, inflation in durable goods increased to 1.9 percent from 1.2 percent in July. Inflation in services in August was 3.8 percent, unchanged from July.

The following figure shows 1-month inflation in the prices of these products, which may make the effects of tariffs clearer. In August, durable goods inflation was 5.1 percent up from 4.5 percent in July. Service inflation was 3.9 percent in August, down slightly from 4.0 percent in July. Inflation in goods and services both running well above 2 percent is not good news for inflation falling back to the Fed’s 2 percent target in the near future.

To better estimate the underlying trend in inflation, some economists look at median inflation and trimmed mean inflation.

Median inflation is calculated by economists at the Federal Reserve Bank of Cleveland and Ohio State University. If we listed the inflation rate in each individual good or service in the CPI, median inflation is the inflation rate of the good or service that is in the middle of the list—that is, the inflation rate in the price of the good or service that has an equal number of higher and lower inflation rates.
Trimmed-mean inflation drops the 8 percent of goods and services with the highest inflation rates and the 8 percent of goods and services with the lowest inflation rates.

The following figure shows that 12-month trimmed-mean inflation (the blue line) was 3.3 percent in August, up slightly from 3.2 July. Twelve-month median inflation (the red line) 3.6 percent in August, unchanged from July.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation rose from 2.9 percent in July to 3.2 percent in August. One-month median inflation remained unchanged at 3.4 percent in August. These data are consistent with the view that inflation is running above the Fed’s 2 percent target.

The CPI inflation data combined with the recent jobs data (which we discuss here and here), indicate that the U.S. economy may be entering a period of stagflation—a combination of rising inflation with falling, or stagnating, output. Stagflation poses a policy dilemma for the Fed’s policymaking Federal Open Market Committee (FOMC) because cutting its target for the federal funds rate to increase economic growth and employment may worsen inflation. At this point, it seems likely that the FOMC will “look through” this month’s rising inflation because it may be largely due to one-time price increases caused by tariffs. Committee members have signaled that they are likely to cut their target for the federal funds rate by 0.25 percent (25 basis points) at the conclusion of their meeting on September 16–17 and again at the conclusion of the following meeting on October 28–29.

CPI Inflation Comes in Slightly Below Expectations, Increasing Likelihood of Fed Rate Cuts

Fed Chair Jerome Powell (left) and Vice Chair Philip Jefferson (photo from federalreserve.gov)

Today (August 12), the Bureau of Labor Statistics (BLS) released its report on the consumer price index (CPI) for July. The following figure compares headline CPI inflation (the blue line) and core CPI inflation (the red line).

The headline inflation rate, which is measured by the percentage change in the CPI from the same month in the previous year, was 2.7 percent in July, unchanged from June.
The core inflation rate, which excludes the prices of food and energy, was 3.0 percent in July, up slightly from 2.9 percent in June. (Note that there was some inconsistency in how the core inflation rate is reported. The BLS, and some news outlets, give the value as 3.1 percent. The unrounded value is 3.0486 percent.)

Headline inflation and core inflation were slightly lower than what economists surveyed had expected.

In the following figure, we look at the 1-month inflation rate for headline and core inflation—that is the annual inflation rate calculated by compounding the current month’s rate over an entire year. Calculated as the 1-month inflation rate, headline inflation (the blue line) declined from 3.5 percent in June to 2.4 percent in July. Core inflation (the red line) increased from 2.8 percent in June to 3.9 percent in July.

The 1-month and 12-month inflation rates are telling somewhat different stories, with 12-month inflation indicating that inflation is stable, although moderately above the Fed’s 2 percent inflation target. The 1-month core inflation rate indicates that inflation may have increased during July.

A key reason for core inflation being significantly higher than headline inflation is that gasoline prices declined by 23.1 percent at an annual rate in June. As shown in the following figure, 1-month inflation in gasoline prices moves erratically—which is the main reason that gasoline prices aren’t included in core inflation.

Does the increase in inflation represent the effects of the increases in tariffs that the Trump administration announced on April 2? (Note that many of the tariff increases announced on April 2 have since been reduced) The following figure shows 12-month inflation in three categories of products whose prices are thought to be particularly vulnerable to the effects of tariffs: apparel (the blue line), toys (the red line), and motor vehicles (the green line). To make recent changes clearer, we look only at the months since January 2021. In July, prices of apparel fell, while the prices of toys and motor vehicles rose by less than 1.0 percent.

The following figure shows 1-month inflation in these prices of these products. In July, motor vehicles prices and apparel prices increased by less than 1 percent, while toy prices increased by 1.9 percent after having soared soared by 24.3 percent in June. At least for these three products, it’s difficult to see tariffs as having had a significant effect on inflation in July.

To better estimate the underlying trend in inflation, some economists look at median inflation and trimmed mean inflation.

Median inflation is calculated by economists at the Federal Reserve Bank of Cleveland and Ohio State University. If we listed the inflation rate in each individual good or service in the CPI, median inflation is the inflation rate of the good or service that is in the middle of the list—that is, the inflation rate in the price of the good or service that has an equal number of higher and lower inflation rates.
Trimmed-mean inflation drops the 8 percent of goods and services with the highest inflation rates and the 8 percent of goods and services with the lowest inflation rates.

The following figure shows that 12-month trimmed-mean inflation (the blue line) was 3.2 percent in July, unchanged from June. Twelve-month median inflation (the red line) 3.6 percent in July, unchanged from June.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation declined from 3.9 percent in June to 2.9 percent in July. One-month median inflation also declined from 4.1 percent in June to 3.7 percent in July. These data indicate that inflation may have slowed in July (the opposite conclusion we noted earlier when discussing 1-month core inflation), while remaining above the Fed’s 2 percent target.

What are the implications of this CPI report for the actions the Federal Reserve’s policymaking Federal Open Market Committee (FOMC) may take at its next meetings? Even before today’s relatively favorable, if mixed, inflation report, the unexpectedly weak jobs report at the beginning of the month (which we discuss in this blog post) made it likely that the FOMC would soon begin cutting its target for the federal funds rate.

Investors who buy and sell federal funds futures contracts assign a probability of 94.3 percent to FOMC cutting its target for the federal funds rate at its September 16–17 meeting by 0.25 (25 basis points) from its current target range of 4.25 percent to 4.50 percent. That probability increased from 85.9 percent yesterday. (We discuss the futures market for federal funds in this blog post.) Investors assign a probability of 61.5 percent to the FOMC cutting its target again by 25 basis points at its October 28–29 meeting, and a probability of 50.3 percent to a third 25 basis point cut at the committee’s December 9–10 meeting.