Consumer price index (CPI) – HubbardOBrienEconomics.com Blog

CPI Inflation Worsens, as Expected

Image generated by ChatGPT.

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.

Effect of Tariffs May Have Pushed Up CPI Inflation in June

Image generated by ChatGTP-4o

Today (July 15), the Bureau of Labor Statistics (BLS) released its report on the consumer price index (CPI) for June. 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 June—up from 2.4 percent in May.
The core inflation rate, which excludes the prices of food and energy, was 2.9 percent in June—up slightly from 2.8 percent in May.

Headline inflation was slightly higher and core inflation was 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) surged from 1.0 percent in May to 3.5 percent in June. Core inflation (the red line) also increased sharply from 1.6 percent in May to 2.8 percent in June.

The 1-month and 12-month inflation rates are telling different stories, with 12-month inflation indicating that the rate of price increase is running moderately above the Fed’s 2 percent inflation target. The 1-month inflation rate indicates more clearly that inflation increased significantly during June.

Does the increase in inflation represent the effects of the increases in tariffs that the Trump administration announced on April 2? (Note that some 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 June, 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 June, the motor vehicles prices fell, while apparel prices increased 5.3 percent and the prices of toys soared by 24.3 percent, which was the second month in a row of very large increases in toy prices.

The 1-month inflation data for these three products are a mixed bag with two of the products showing significant increases and one showing a decline. It’s likely that some of the effects of the tariffs are still being cushioned by firms increasing their inventories earlier in the year in anticipation of price increases resulting from the tariffs. As firms draw down their inventories, we may see tariff-related increases in the prices of more goods later in the year.

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 June, up from 3.0 percent in May. Twelve-month median inflation (the red line) 3.6 percent in June, up from 3.5 percent in May.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation rose sharply from 2.2 percent in May to 3.9 percent in June. One-month median inflation also rose sharply from 2.7 percent in May to 4.1 percent in June. These data provide some confirmation that inflation likely rose from May to June.

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? Investors who buy and sell federal funds futures contracts still expect that the FOMC will leave its target for the federal funds rate unchanged at its July 29–30 meeting before cutting its target by 0.25 (25 basis points) from its current target range of 4.25 percent to 4.50 percent at its September 16–17 meeting. (We discuss the futures market for federal funds in this blog post.) The FOMC’s actions will likely depend in part on the effect of the tariff increases on the inflation rate during the coming months. If inflation were to increase significantly, it’s possible that the committee would decide to raise, rather than lower, its target range.

Consumer Expectations of Inflation Have Jumped. How Accurately Have They Forecast Past Inflation?

Image generated by ChatGTP-4o

Since 1946, the Institute for Social Research (ISR) at the University of Michigan has conducted surveys of consumers. Each month, the ISR interviews a nationwide sample of 900 to 1,000 consumers, asking a variety of questions, including some on inflation.

The results of the University of Michigan surveys are widely reported in the business press. In the latest ISR survey it’s striking how much consumers expect inflation to increase. The median response by those surveyed to the question “By about what percent do you expect prices to go up/down on the average, during the next 12 months?” was 7.3 percent. If this expectation were to prove to be correct, inflation, as measured by the percentage change in the consumer price index (CPI), will have to more than double from its April value of 2.3 percent.

How accurately have consumers surveyed by the ISR predicted future inflation? The question is difficult to answer definitively because the survey question refers only to “prices” rather than to a measure of the price level, such as the consumer price index (CPI). Some people may have the CPI in mind when answering the question, but others may think of the prices of goods they buy regularly, such as groceries or gasoline. Nevertheless, it can be interesting to see how well the responses to the ISR survey match changes in the CPI, which we do in the following figure for the period from January 1978—when the survey began—to April 2024—the last month for which we have CPI data from the month one year in the future.

The blue line shows consumers’ expectations of what the inflation rate will be over the following year. The red line shows the inflation rate in a particular month calculated as the percentage change in the CPI from the same month in the previous year. So, for instance, in February 2023, consumers expected the inflation rate over the next 12 months to be 4.2 percent. The actual inflation, measured as the percentage change in the CPI between February 2023 and February 2024 was 3.2 percent.

The figure shows that consumers forecast inflation reasonably well. As a simple summary, the average inflation rate consumers expected over this whole period was 3.6 percent, while the actual inflation rate was 3.5 percent. So, for the period as a whole, the inflation rate that consumers expected was about the same as the actual inflation rate. The most persistent errors occurred during the recovery from the Great Recession of 2007–2008, particularly the five years from 2011 to 2016. During those five years, consumers expected inflation to be 2.5 percent or more, whereas actual inflation was typically below 2 percent.

Consumers also missed the magnitude of dramatic changes in the inflation rate. For instance, consumers did not predict how much the inflation would increase during the 1978 to 1980 period or during 2021 and early 2022. Similarly, consumers did not expect the decline in the price level from March to October 2009.

The two most recent expected inflation readings are 6.5 percent in April and, as noted earlier, 7.3 percent in May. In other words, the consumers surveyed are expecting inflation in April and May 2026 to be much higher than the 2 percent to 3 percent inflation rate most economists and Fed policymakers expect. For example, in March, the median forecast of inflation at the end of 2026 by the members of the Fed’s policymaking Federal Open Market Committee (FOMC) was only 2.2 percent. (Note, though, that FOMC members are projecting the percentage change in the personal consumption expenditures (PCE) price index rather than the percentage change in the CPI. CPI inflation has typically been higher than PCE inflation. For instance, in the period since January 1978, average CPI inflation was 3.6 percent, while average PCE inflation was 3.1 percent).

If economists and policymakers are accurately projecting inflation in 2026, it would be an unusual case of consumers in the ISR survey substantially overpredicting the rate of inflation. One possibility is that news reports of the effect of the Trump Administration’s tariff policies on the inflation rate may have caused consumers to sharply increase the inflation rate they expect next year. If, as seems likely, the tariff increases end up being much smaller than those announced on April 2, the inflation rate in 2026 may be lower than the consumers surveyed expect.

Annual CPI Inflation Is the Lowest in Four Years

Image generated by ChatGTP-4o of a family shopping in a supermarket.

Today (May 13), the Bureau of Labor Statistics (BLS) released its report on the consumer price index (CPI) for April. The following figure compares headline inflation (the blue line) and core inflation (the green line).

The headline inflation rate, which is measured by the percentage change in the CPI from the same month in the previous year, was 2.3 percent in April—down from 2.4 percent in March.
The core inflation rate, which excludes the prices of food and energy, was 2.8 percent in April—unchanged from March.

Headline inflation was the lowest since February in 2021—before the acceleration in inflation that began in the spring of 2021. Core inflation was the lowest since March 2021. Both headline inflation and core inflation were 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) rose from –0.6 percent in March to 2.7 percent in April. Core inflation (the red line) rose from 0.9 percent in March to 2.9 percent in April.

The 1-month and 12-month inflation rates are telling different stories, with 12-month inflation indicating that the rate of price increase is back to what it was in early 2021. The 1-month inflation rate indicates a significant increase in April from the very low rate of price increase in March. The 1-month inflation rate indicates that inflation is still running ahead of the Fed’s 2 percent annual inflation target.

Of course, it’s important not to overinterpret the data from a single month. The figure shows that 1-month inflation is particularly volatile. It is possible, though, that the increase in 1-month inflation in April reflects the effect on the price level of the large tariff increases the Trump Administration announced on April 2. Whether those effects will persist is unclear because the administration has been engaged in negotiations that may significantly reduce the tariff increases announced in April. Finally, 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.

There’s been considerable discussion in the media about continuing inflation in grocery prices. The following figure shows inflation in the CPI category “food at home,” which is primarily grocery prices. Inflation in grocery prices was 2.0 percent in April and has been below 2.5 percent every month since September 2023. Over the past year, there has been a slight upward trend in inflation in grocery prices but to this point it remains relatively low, although well above the very low rates of inflation in grocery prices that prevailed from 2015 to 2019.

It’s the nature of the CPI that in any given month some prices will increase rapidly while other prices will increase slowly or even decline. Although, on average, grocery price inflation has been relatively low, there have been substantial increases in the prices of some food items. For instance, a recent article in the Wall Street Journal noted that rising cattle prices will likely be reflected in coming months rising prices for beef purchased in supermarkets. The following figure shows inflation in the prices of ground beef and steaks over the period starting in January 2015. As we should expect, the prices of these two goods are more volatile mont to month than are grocery prices as a whole. Ground beef prices increased 10.8 percent in April, an increase that will likely be noticeable to someone planning for a Memorial Day cookout.

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 3.0 percent in April, unchanged from March. Twelve-month median inflation (the red line) 3.5 percent in April, also unchanged from March.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation increased from 2.6 percent in March to 3.0. percent in April. One-month median inflation declined from 4.2 percent in March to 4.0 percent in April. These data, although mixed, provide some confirmation that inflation likely increased somewhat from March to April.

What are the implications of this CPI report for the actions the FOMC may take at its next several meetings? Investors who buy and sell federal funds futures contracts still do not expect that the FOMC will cut its target for the federal funds rate at its next two meetings. (We discuss the futures market for federal funds in this blog post.) Today, investors assigned only an 8.4 percent probability to the Fed’s policymaking Federal Open Market Committee (FOMC) cutting its target from the current 4.25 percent to 4.50 percent range at its meeting on June 17–18. Investors assigned a probability of 34.9 percent that the FOMC will cut its target after its meeting on July 29–30. Investors assigned a probability of 73.1 percent that the committee will cut its target after its meeting on September 16–17. The FOMC’s actions will likely depend in part on the success of the current trade negotiations.

CPI Inflation Is Lower than Expected, but Still above Target

Photo courtesy of Lena Buonanno.

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

The headline inflation rate, which is measured by the percentage change in the CPI from the same month in the previous year, was 2.8 percent in February—down from 3.0 percent in January.
The core inflation rate, which excludes the prices of food and energy, was 3.1 percent in February—down from 3.3 percent in January.

Both headline inflation and core inflation were slightly below 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) fell sharply from 5.7 percent in February to 2.6 percent in January. Core inflation (the green line) decreased from 5.5 percent in January to 2.8 percent in January.

Overall, considering 1-month and 12-month inflation together, the most favorable news is the sharp decline in both the headline and the core 1-month inflation rats. But inflation is still running ahead of the Fed’s 2 percent annual inflation target.

Of course, it’s important not to overinterpret the data from a single month. The figure shows that 1-month inflation 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.

There’s been considerable discussion in the media about continuing inflation in grocery prices. In the following figure the blue line shows inflation in the CPI category “food at home,” which is primarily grocery prices. Inflation in grocery prices was 1.8 percent in February and has been below 2 percent every month since November 2023. Although on average grocery price inflation has been low, there have been substantial increases in the prices of some food items. For instance, egg prices—shown by the green line—increased by 96.8 percent in February. But, as the figure shows, egg prices are usually quite volatile month-to-month, even when the country is not dealing with an epidemic of bird flu.

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 3.1 percent in February, unchanged from January. Twelve-month median inflation (the green line) declined slightly from 3.6 percent in January to 3.5 percent in February.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation fell from 5.1 percent in January to 3.3. percent in February. One-month median inflation from 3.9 percent in January to 3.5 percent in February. These data provide confirmation that (1) CPI inflation at this point is likely running higher than a rate that would be consistent with the Fed achieving its inflation target, and (2) inflation slowed somewhat from January to February.

What are the implications of this CPI report for the actions the FOMC may take at its next several meetings? The major stock market indexes rose sharply at the beginning of trading this morning, but then swung back and forth between losses and gains. Inflation being lower than expected may have increased the probability that the FOMC will cut its target for the federal funds rate sooner rather than later. Lower inflation and lower interest rates would be good news for stock prices. But investors still appear to be worried about the extent to which a trade war might both slow economic growth and increase the price level.

Investors who buy and sell federal funds futures contracts still do not expect that the FOMC will cut its target for the federal funds rate at its next two meetings. (We discuss the futures market for federal funds in this blog post.) Today, investors assigned only a 1 percent probability that the Fed’s policymaking Federal Open Market Committee (FOMC) will cut its target from the current 4.25 percent to 4.50 percent range at its meeting next week. Investors assigned a probability of 33.3 percent that the FOMC would cut its target after its meeting on May 6–7. Investors today assigned a probability of 78.6 percent that the committee will cut its target after its meeting on June 17–18. That probability has fallen slightly over the past week.

At his press conference after next Wednesday’s FOMC meeting, Fed Chair Jerome Powell will give his thoughts on the current economic situation.

Headline CPI Inflation Is Higher in December but Core Inflation Is Lower than Expected

Image generated by GTP-4o illustrating inflation

On January 15, the Bureau of Labor Statistics (BLS) released its monthly report on the consumer price index (CPI). The following figure compares headline inflation (the blue line) and core inflation (the green line).

The headline inflation rate, which is measured by the percentage change in the CPI from the same month in the previous month, was 2.9 percent in December—up from 2.7 percent in November.
The core inflation rate, which excludes the prices of food and energy, was 3.2 percent in December—down from 3.3 percent in November.

Headline inflation was slightly above and core inflation was slightly below 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) jumped from 3.8 percent in November to 4.8 percent in December. Core inflation (the green line) decreased from 3.8 percent in November to 2.7 percent in December.

Overall, considering 1-month and 12-month inflation together, the most favorable news is the low value of the 1-month core inflation rate. The most concerning news is a sharp increase in 1-month headline inflation, which brought that measure to its highest reading since February 2024. On balance, this month’s CPI report doesn’t do much to challenge the conclusion of other recent inflation reports that progress on lowering inflation has slowed or, possibly, stalled. So, the probability of a “no landing” outcome, with inflation remaining above the Fed’s target for an indefinite period, seems to have at least slightly increased.

As we’ve discussed in previous blog posts, Federal Reserve Chair Jerome Powell and his colleagues on the Fed’s policymaking Federal Open Market Committee (FOMC) have been closely following inflation in 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.

As the following figure shows, inflation in the price of shelter has been a significant contributor to headline inflation. The blue line shows 12-month inflation in shelter, and the red line shows 1-month inflation in shelter. Twelve-month inflation in shelter has been declining since the spring of 2023, but in December it was still high at 4.6 percent. One-month inflation in shelter—which is much more volatile than 12-month inflation in shelter—fell from 4.1 percent in November to 3.1 percent in December.

To better estimate of 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 median inflation (the red line) declined slightly from 3.9 percent in November to 3.8 percent in December. Twelve-month trimmed mean inflation (the blue line) was unchanged at 3.2 percent for the fifth month in a row.

The following figure shows 1-month median and trimmed mean inflation. One-month median inflation rose from 2.8 percent in November to 3.6 percent in December. One-month trimmed mean inflation fell slightly from 3.3 percent in November to 3.2 percent in December. These data provide confirmation that (1) CPI inflation at this point is likely running higher than a rate that would be consistent with the Fed achieving its inflation target, and (2) that progress toward the target has slowed.

What are the implications of this CPI report for the actions the FOMC may take at its next meeting on January 28-29? The stock market rendered a quick verdict, as the following figure from the Wall Street Journal shows. As soon as the market opened on Wednesday morning, all three of the most widely followed stock market indexes jumped—as indicated by the vertical segments in the figure. Investors seem to be focusing on core CPI inflation being lower than expected, which should increase the probability that the FOMC will cut its target for the federal funds rate at either its March or May meeting. Lower inflation and lower interest rates would be good news for stock prices.

Investors who buy and sell federal funds futures contracts still do not expect that the FOMC will cut its target for the federal funds rate at its next meeting, as indicated by the following figure. (We discuss the futures market for federal funds in this blog post.) Today, investors assign a probability of 93.7 percent to the FOMC leaving its target range for the federal funds rate unchanged at 4.25 percent to 4.50 percent at its January 28-29 meeting, and a probability of only 2.7 percent to the committee cutting its target range by 0.25 percentage point (25 basis points).

Why Were Glenn and Tony Particularly Happy in 2024?

Because inflation in chocolate chip cookie prices ended, or course! In December 2023, the average retail price of a pound of chocolate chip cookies (even we try not to eat a pound of cookies in one sitting!) was $5.12. In November 2024, the price had declined to $4.92 per pound. As the following figure shows, the days of 20 percent annual inflation in chocolate chip cookie inflation that lasted from September 2022 to April 2023 are behind us—at least for now.

The following figure shows annual inflation in overall food prices as measured by the percentage change in the food component of the consumer price index (CPI) from the same month in the previous year. During 2024, food inflation has been running at an annual rate of between 2.0 percent and 2.5 percent. In contrast, chocolate chip cookies actually experienced deflation of –1.1 percent. So, the price of chocolate chip cookies relative to the prices of other food products declined by more than did the absolute price.

We were led to contemplate chocolate chip cookie prices by this article in the New York Times that discusses the FRED data set. (A subscription may be required to access the article.) Like many other economists, we heavily use the FRED site and greatly appreciate the efforts of those at the Federal Reserve Bank of St. Louis who have made this data resource available.

As Expected, CPI Inflation Is Higher in November as the Fed Struggles to Hit Its Inflation Target.

Image generated by GTP-4o illustrating inflation.

On December 11, the Bureau of Labor Statistics (BLS) released its monthly report on the consumer price index (CPI). The following figure compares headline inflation (the blue line) and core 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 month, was 2.7 percent—up from 2.6 percent in October.
The core inflation rate, which excludes the prices of food and energy, was unchanged at 3.3 percent for the fourth month in a row.

Both headline inflation and core inflation were the same as economists surveyed by the Wall Street Journal 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) increased sharply from 3.0 percent in October to 3.8 percent in November. Core inflation (the red line) increased from 3.4 percent in October to 3.8 percent in November.

The relatively high rates of core inflation in both the 12-month and 1-month measures are concerning because most economists believe that core inflation is a better indicator of the underlying inflation rate than is headline inflation. It’s important not to overinterpret the data from a single month, although this is the fourth month in a row that core inflation has been above 3 percent. (Note, that the Fed uses the personal consumption expenditures (PCE) price index, rather than the CPI in evaluating whether it is hitting its 2 percent inflation target.)

As we’ve discussed in previous blog posts, Federal Reserve Chair Jerome Powell and his colleagues on the Fed’s policymaking Federal Open Market Committee (FOMC) have been closely following inflation in the price of shelter. The price of “shelter” in the CPI, as explained here, includes both rent paid for an apartment or 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.

As the following figure shows, inflation in the price of shelter has been a significant contributor to headline inflation. The blue line shows 12-month inflation in shelter, and the red line shows 1-month inflation in shelter. Twelve-month inflation in shelter has been declining since the spring of 2023, but in November it was at a still high 4.8 percent. One-month inflation in shelter—which is much more volatile than 12-month inflation in shelter—fell from 4.7 percent in October to 4.1 percent in November.

To better estimate of 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 good and services with the highest inflation rates and the 8 percent of goods and services with the lowest inflation rates.

The following figure is from the Federal Reserve Bank of Cleveland. It shows that median inflation (the orange line) fell from 4.1 percent in October to 3.9 percent in November. Trimmed mean inflation (the blue line) was unchanged at 3.2 percent for the fourth month in a row. These data provide confirmation that (1) core CPI inflation at this point is likely running higher than a rate that would be consistent with the Fed achieving its inflation target, and (2) that progress toward the target has slowed.

Will this persistence in inflation above the Fed’s 2 percent target cause the FOMC to hold constant its target range for the federal funds rate? Investors who buy and sell federal funds futures contracts still expect that the FOMC will cut its target for the federal funds rate by 0.25 percentage point at its next meeting on December 17-18. (We discuss the futures market for federal funds in this blog post.) The following figure shows that today these investors assign a probability of 94.7 percent to the FOMC cutting its target for the federal funds rate by 0.25 percentage point and a probability of only 5.3 percent to the committee leaving its target unchanged at its current range of 4.50 percent to 4.75 percent.

Latest CPI Report Indicates That the Fed May Have Trouble Guiding the Economy the Last 1,000 Feet to a Soft Landing

Image illustrating inflation generated by GTP-4o.

On November 13, the Bureau of Labor Statistics (BLS) released its monthly report on the consumer price index (CPI). The following figure compares headline inflation (the blue line) and core 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 month, was 2.6 percent—up from 2.4 percent in September.
The core inflation rate, which excludes the prices of food and energy, was unchanged at 3.3 percent for the third month in a row.

Both headline inflation and core inflation were the values that economists surveyed by the Wall Street Journal 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) increased from 2.2 percent in September to 3.0 percent in October. Core inflation (the red line) fell from 3.8 percent in September to 3.4 percent in October.

Overall, considering 1-month and 12-month inflation together, the U.S. economy may still be on course for a soft landing—with the annual inflation rate returning to the Fed’s 2 percent target without the economy being pushed into a recession. However, progress on lowering inflation may have slowed or, possibly, stalled. The relatively high rates of core inflation in both the 12-month and 1-month measures are concerning because most economists believe that core inflation is a better indicator of the underlying inflation rate than is headline inflation. It’s important not to overinterpret the data from a single month, although this is the third month in a row that core inflation has been above 3 percent. (Note, that the Fed uses the personal consumption expenditures (PCE) price index, rather than the CPI in evaluating whether it is hitting its 2 percent inflation target.)

As we’ve discussed in previous blog posts, Federal Reserve Chair Jerome Powell and his colleagues on the Fed’s policymaking Federal Open Market Committee (FOMC) have been closely following inflation in the price of shelter. The price of “shelter” in the CPI, as explained here, includes both rent paid for an apartment or 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.

As the following figure shows, inflation in the price of shelter has been a significant contributor to headline inflation. The blue line shows 12-month inflation in shelter, and the red line shows 1-month inflation in shelter. Twelve-month inflation in shelter has been declining since the spring of 2023, but increased in October to 4.9 percent from 4.8 percent in September. One-month inflation in shelter—which is much more volatile than 12-month inflation in shelter—increased sharply from 2.7 percent in September to 4.7 percent in October.

Chair Powell and the other members of the FOMC have been expecting that the inflation in shelter would continue to decline. For instance, in his press conference following the last FOMC meeting on November 7, Powell stated that:

“What’s going on there is, you know, market rents, newly signed leases, are experiencing very low inflation. And what’s happening is older—you know, leases that are turning over are taking several years to catch up to where market leases are; market rent leases are. So that’s just a catch-up problem. It’s not really reflecting current inflationary pressures, it’s reflecting past inflationary pressures.”

The recent uptick in shelter inflation may concern FOMC members as they consider whether, and by how much, to cut their target for the federal funds rate at their next meeting on December 17-18. Bear in mind, though, that shelter has a weight of only 15 percent in the PCE price index that the Fed uses to gauge whether it is hitting its 2 percent inflation target in contrast with the 33 percent weight that shelter has in the CPI.

To better estimate of 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 good and services with the highest inflation rates and the 8 percent of goods and services with the lowest inflation rates.

The following figure is from the Federal Reserve Bank of Cleveland. It shows that median inflation (the orange line) was unchanged in October at 4.1 percent. Trimmed mean inflation (the blue line) was also unchanged at 3.2 percent. These data provide confirmation that (1) core CPI inflation at this point is likely running at least slightly higher than a rate that would be consistent with the Fed achieving its inflation target and (2) that progress toward the target has slowed.

Will this persistence in inflation above the Fed’s 2 percent target cause the FOMC to hold constant its target range for the federal funds rate? Investors who buy and sell federal funds futures contracts expect that the FOMC will cut still cut its target for the federal funds rate by 0.25 percentage point at its December meeting. (We discuss the futures market for federal funds in this blog post.) The following figure that today these investors assign a probability of 75.7 percent to the FOMC cutting its target for the federal funds rate by 0.25 percentage point and a probability of 24.3 percent to the committee leaving its target unchanged at a range of 4.50 percent to 4.75 percent.