Tag: Trimmed mean CPI inflation

CPI Inflation for September Slightly Below Forecasts but Still Above Target

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As we’ve noted in recent blog posts (here and here), the shutdown of the federal government has interrupted the release of government data, including the “Employment Situation” report prepared monthly by the Bureau of Labor Statistics (BLS). The federal government made an exception for the BLS report on the consumer price index (CPI) because annual cost-of-living increases in Social Security payments are determined by the average inflation rate in the CPI during July, August, and September.

Accordingly, today (October 24), the Bureau of Labor Statistics (BLS) released its report on the consumer price index (CPI) for September. 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 3.0 percent in September, up from 2.9 percent in August. 
  • The core inflation rate, which excludes the prices of food and energy, was also 3.0 percent in September, down slightly from 3.1 percent in August. 

Headline inflation and core inflation were both slightly lower than the 3.1 rate for both measures that economists had expected.

In the following figure, we look at the 1-month inflation rates 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 the very high rate of 4.7 percent in August to the still high rate of 3.8 percent in September. Core inflation (the red line) declined from 4.2 percent in August to 2.8 percent in September.

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

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, all core goods, and core services. Services 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 declined slightly to 1.8 percent in September from 1.9 percent in August. Inflation in core goods was unchanged in September at 1.5 percent. Inflation in core services fell slightly in September to 3.5 percent from 3.6 percent in August.

The following figure shows 1-month inflation in the prices of these products, which may makes clearer the effects of the tariff increases. In September, durable goods inflation was a high 4.0 percent, although down from 5.1 percent in August. Core goods inflation in September was 2.7 percent, down from 3.4 percent in August. Core service inflation was 2.9 percent in August, down from 4.3 percent in August.

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 September, down slightly from 3.3 August. Twelve-month median inflation (the red line) 3.5 percent in September, down slightly from 3.6 in August.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation declined from 3.2 percent in August to 2.4 percent in September. One-month median inflation declined from 3.4 percent in August to 2.4 percent in September. These data are consistent with the view that inflation is still running above the Fed’s 2 percent target.

With inflation running above the Fed’s 2 percent annual target, we wouldn’t typically expect that the Fed’s policymaking Federal Open Market Committee (FOMC) would cut its target for the federal funds rate at its October 28–29 meeting. At this point, though, it seems likely that the FOMC will “look through” the higher inflation rates of the last few months because the higher rates may be largely attributable 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 percentage point (25 basis points) at the conclusion of next week’s meeting.

This morning, investors who buy and sell federal funds futures contracts assign a probability of 96.7 percent to the FOMC cutting its target for the federal funds rate at that meeting by 25 basis points from its current target range of 4.00 percent to 4.25 percent. Investors assign a 95.9 percent probability of the committee cutting its target by an additional 25 basis points to 3.50 percent to 3.75 percent at its December 9–10 meeting. If persistently high inflation rates reflect more than just the temporary effects of tariffs, these rate cuts will make it unlikely that the Fed will reach its 2 percent inflation target anytime soon.

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.

Effect of Tariffs May Have Pushed Up CPI Inflation in June

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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. 

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.

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.

Not Much Sign of the Effects of Tariffs in the May CPI Inflation Report

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Today (June 11), the Bureau of Labor Statistics (BLS) released its report on the consumer price index (CPI) for May. The following figure compares headline CPI inflation (the blue line) and core CPI 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 2.4 percent in May—up slightly from 2.3 percent in April. 
  • The core inflation rate, which excludes the prices of food and energy, was 2.9 percent in May—up slightly from 2.8 percent in April. 

Headline inflation was slightly lower and core inflation was the same as 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) decreased from 2.7 percent in April to 1.0 percent in May. Core inflation (the red line) decreased from 2.9 percent in April to 1.6 percent in May.

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 slightly above the Fed’s 2 percent inflation target. The 1-month inflation rate indicates a significant slowing of inflation during May. 

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.

One of the key questions facing Federal Reserve policymakers is to what extent inflation will be affected by the increase in tariffs that the Trump administration announced on April 2. 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). In May, prices of apparel fell, while the prices of toys and motor vehicles rose by less than 0.5 percent.

The following figure shows 1-month inflation in these categories. In May, the prices of apparel and motor vehicles fell, while the price of toys soared by 17.4 percent, but that followed a decline of 10.3 percent in April.

Taken together this month’s CPI data don’t show much effect of tariffs on inflation. It’s possible that some of the effects of the tariffs have been cushioned by firms increasing their inventories earlier in the year in anticipation of price increases resulting from the tariffs. If so, as firms draw down their inventories, we may see tariff-related increases in the prices of some 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 3.0 percent in May, unchanged from April. Twelve-month median inflation (the red line) 3.5 percent in May, also unchanged from April.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation decreased from 3.0 percent in April to 2.2. percent in May. One-month median inflation declined from 4.0 percent in April to 2.7 percent in May. These data provide some confirmation that inflation likely fell somewhat from April to May.

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 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.) Investors assign the highest probability to the FOMC making two 0.25 percentage point (25 basis points) cuts in its target rate by the end of the year. Those cuts would reduce the target range from the current 4.25 percent to 4.50 percent range to a range of 3.75 to 4.00 percent. The FOMC’s actions will likely depend in part on what the tariff increases will end up being following the conclusion of the current trade negotiations and what the effect on inflation from the tariff increases will be. 

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 Slows More than Expected

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Today (April 10), 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 year, was 2.4 percent in March—down from 2.8 percent in February. 
  • The core inflation rate, which excludes the prices of food and energy, was 2.8 percent in March—down from 3.1 percent in February. 

Both headline inflation and core inflation were 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 2.6 percent in March to –0.6 percent—that is, the economy experienced deflation in March. Core inflation (the red line) decreased from 2.6 percent in February to 0.7 percent in March.

Overall, considering 1-month and 12-month inflation together, inflation slowed significantly in March. Of course, it’s important not to overinterpret the data from a single month. The figure shows that 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.

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 2.4 percent in March, up from 1.8 percent in February, but still far below the peak of 13.6 percen in August 2022. Although, on average, grocery price inflation has been low over the past 18 months, there have been substantial increases in the prices of some food items. For instance, egg prices—shown by the red line—increased by 108.1 percent in March. 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 3.0 percent in March, down from 3.1 percent in February. Twelve-month median inflation (the red line) also declined slightly from 3.1 percent in February to 3.0 percent in March.

The following figure shows 1-month trimmed-mean and median inflation. One-month trimmed-mean inflation fell from 3.3 percent in February to 2.6. percent in March. One-month median inflation increased from 3.5 percent in February to 4.1 percent in March. These data are noticeably higher than either the 12-month measures for these variables or the 1-month and 12-month measures of headline and core inflation. Again, though, all 1-month inflation measures can be volatile.

There isn’t much sign in today’s CPI report that the tariffs recently imposed by the Trump Administration have affected retail prices. President Trump announced yesterday that many of the tariffs would be suspended for at least 90 days, although the across-the-board tariff of 10 percent remains in place and a tariff of 145 percent has been imposed on goods imported from China. It would surprising if those tariff increases don’t begin to have at least some effect on the CPI over the next few months. As we noted in this post from earlier in the month, Tariffs pose a dilemma for the Fed, because tariffs have the effect of both increasing the price level and reducing real GDP and employment.

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 two 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 a 29.9 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 on May 6–7. Investors assigned a probability of 85.2 percent that the FOMC would cut its target after its meeting on June 17–18 by at least 0.25 percent (or 25 basis points).

By the time the FOMC meets again in early May we may have more data on the effects the tariffs are having on the economy.

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.

CPI Inflation in January Is Higher than Expected

Image generated by GTP-4o illustrating inflation

On February 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 dotted 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 3.0 percent in January—up from 2.9 percent in December. 
  • The core inflation rate, which excludes the prices of food and energy, was 3.3 percent in January—up from 3.2 percent in December. 

Headline inflation and core inflation were both above 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 4.5 percent in December to 5.7 percent in January—following a large jump in inflation from November to December. Core inflation (the dotted green line) more than doubled from 2.5 percent in December to 5.5 percent in January.

Overall, considering 1-month and 12-month inflation together, today’s data are concerning. One-month headline inflation is the highest it’s been since August 2023. One-month core inflation is the highest it’s been since April 2023. This month’s CPI report reinforces the conclusion from other recent inflation reports that progress on lowering inflation appears to have stalled. So, the probability of a “no landing” outcome, with inflation remaining above the Fed’s target for an indefinite period, seems to have increased. 

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.

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 green line shows 1-month inflation in shelter. Twelve-month inflation in shelter has been declining since the spring of 2023, but in January it was still relatively high at 4.4 percent. One-month inflation in shelter—which is much more volatile than 12-month inflation in shelter—rose sharply from 3.3 percent in December to 4.6 percent in January. Clearly a worrying sign given that many economists were expecting that shelter inflation would continue to slow.

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 at 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) jumped from 3.1 percent in December to 5.2 percent in January. Median inflation (the green line), which had been stable over the past five months, increased from 3.2 percent in December to 3.9 percent in January.

The following figure shows 1-month median and trimmed-mean inflation. One-month trimmed-mean inflation jumped from 3.1 percent in December to 5.1 percent in January. One-month median inflation rose from 3.2 percent in December to 3.9 percent in January. These data provide confirmation that (1) CPI inflation at this point is 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.

Looking at the futures market for federal funds, investors who buy and sell federal funds futures contracts are not expecting that the Fed’s policymaking Federal Open Market Committee (FOMC) will cut its target for the federal funds until this fall. (We discuss the futures market for federal funds in this blog post.) Investors assign a higher probability to the FOMC leaving its target range for the federal funds rate unchanged at 4.25 percent to 4.50 percent at its January, March, June, July, and September meetings. It’s not until the FOMC’s meeting on October 28-29 that, as shown below, investors assign a higher probability to a rate cut than to the committee leaving the rate unchanged.

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. 

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.

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).

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.

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 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 increased.

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.