Beneath the Skin of CPI Inflation: Worst Month-to-Month Acceleration of CPI since Aug 2023, on Spikes in Used Vehicles, Non-Housing Services, Food, Energy

Inflation has been going in the wrong direction relentlessly month-to-month since June.

By Wolf Richter for WOLF STREET.

Inflation dished out another bad surprise with a big increase in January from December, which wasn’t a surprise because inflation, once it gets going, is known to do that. This time, the hot spots were durable goods, fueled by the continued massive month-to-month increases in used vehicle prices, and non-housing services, such as auto insurance, admissions, subscriptions, etc. Food and energy prices also jumped in January. Rent inflation accelerated. But at least the CPI for apparel and shoes dropped in January.

The overall Consumer Price Index rose by 0.47% (+5.7% annualized) in January from December, the worst month-to-month increase since August 2023. It has been accelerating relentlessly since the low point in June (blue). This acceleration pushed the year-over-year increase to 3.0%, the worst increase since May.

  • 3-month CPI: +4.5% annualized, sharpest increase since November 2022, and sixth month-to-month acceleration in a row (not shown in the chart).
  • 6-month CPI: + 3.6%, worst increase since September 2023. Inflation is going in the wrong direction (red):

Month-to-month “Core” CPI, which excludes food and energy components to track underlying inflation, jumped by 0.45% (+5.5% annualized) in January from December, the worst increase since April 2023, (blue in the chart below).

The 6-month average “core” CPI accelerated to +3.7% annualized, the third month in a row of acceleration and the worst since May (red).

The major components, year-over-year:

  • Overall CPI: +3.0% (yellow), worst since May 2024
  • Core CPI +3.26% (red), has not improved at all since June 2024
  • Core Services CPI: +4.33% (blue). As we’ll see in a moment, month-to-month, it spiked by 6.35% annualized, the worst increase since February.
  • Durable goods CPI: -1.21% (green). Month-to-month: +4.6% annualized on a spike in used vehicles, which sharply reduced the year-over-year deflation in durable goods.


“Core services” CPI.

Month-to-month, the core services CPI, which are all services less energy services, spiked by 6.35% annualized (+0.51% not annualized) in January from December, the worst increase since February 2024 (blue line in the chart below).

The three-month core services CPI accelerated to +4.35% annualized, the worst increase since October.




The 6-month core services CPI, which irons out a lot of the month-to-month squiggles, accelerated to 4.4% annualized, the worst since June (red).

Some services raise their prices annually in January, and those price increases then help produce the spikes of the services CPI in January and February. But we did not see those kinds of price spikes in the Januarys and Februarys before the pandemic; they’re signs of persistent high inflation in services that had not occurred before the pandemic:

Housing components of core services.

The Owners’ Equivalent of Rent CPI accelerated slightly to +3.8% annualized in January from December (+0.31% not annualized). The three-month average decelerated a hair to +3.6% annualized.

OER indirectly reflects the expenses of homeownership: homeowners’ insurance, HOA fees, property taxes, and maintenance. It’s the only measure for those expenses in the CPI. It is based on what a large group of homeowners estimates their home would rent for, with the assumption that a homeowner would want to recoup their cost increases by raising the rent.

As a stand-in for homeowners’ insurance, HOA fees, property taxes, and maintenance costs, OER accounts for 26.3% of overall CPI and estimates inflation of shelter as a service for homeowners.

Rent of Primary Residence CPI accelerated to +4.2% annualized in January from December. The 3-month rate accelerated to +3.6%.

Rent CPI accounts for 7.5% of overall CPI. It is based on rents that tenants actually paid, not on asking rents of advertised vacant units for rent. The survey follows the same large group of rental houses and apartments over time and tracks the rents that the current tenants, who come and go, pay in rent for these units.

Year-over-year, rent CPI (blue in the chart below) barely budged in January at +4.24% from +4.27% in December. OER CPI decelerated to +4.6% in January from +4.8% in December (red).

“Asking rents…” The Zillow Observed Rent Index (ZORI) and other private-sector rent indices track “asking rents,” which are advertised rents of vacant units on the market for rent. Because rentals don’t turn over that much, the spike in asking rents through mid-2022 never fully translated into the CPI indices because not many people actually ended up paying those jacked-up asking rents.

For December, the ZORI (seasonally adjusted) rose by 0.28% month-to-month and by 3.4% year-over-year.

The chart shows the CPI Rent of Primary Residence (blue, left scale) as index value, not percentage change; and the ZORI in dollars (red, right scale). The left and right axes are set so that they both increase each by 55% from January 2017:

  • Since January 2017: ZORI +52%, CPI Rent +42%.
  • Since January 2020: ZORI +34%, CPI Rent +27%.

Rent inflation vs. home-price inflation: The red line in the chart below represents the CPI for Rent of Primary Residence as index value. The purple line represents Zillow’s “raw” Home Value Index for the US. Both indexes are set to 100 for January 2000 [home price inflation by metro: The Most Splendid Housing Bubbles in America ]:

The CPI for motor-vehicle maintenance & repair jumped by 6.2% annualized in January from December. Year-over-year, the index rose by 5.9%, the worst increase since May. Since January 2020, the index has surged by 40%. This chart shows the price level, not the year-over-year percentage change:

The CPI for motor vehicle insurance spiked by 26.7% annualized in January from December (2.0% not annualized), the worst increase since March 2024. Year-over-year, the index spiked by 11.8%.

Since January 2022, motor vehicle insurance prices have exploded by 55%, fueled by the historic spike in used vehicle prices in 2021 and 2022 (=replacement costs for insurance companies) and by surging repair costs.

Note the spike in January:

Food away from Home CPI rose by 2.9% annualized in January from December, and by 3.4% year-over-year, the smallest increase since July 2020.

These food services include full-service and limited-service meals and snacks served away from home, such as in restaurants, cafeterias, at stalls, etc.

The table below shows the major categories of “core services.” Combined, they accounted for 64% of total CPI:

Major Services excluding Energy Services Weight in CPI MoM YoY
Core Services 64% 0.3% 4.8%
Owner’s equivalent of rent 26.3% 0.3% 4.6%
Rent of primary residence 7.5% 0.3% 4.2%
Medical care services & insurance 6.7% 0.0% 2.7%
Food services (food away from home) 5.6% 0.2% 3.4%
Motor vehicle insurance 2.8% 2.0% 11.8%
Education (tuition, childcare, school fees) 2.5% 0.2% 3.6%
Admission, movies, concerts, sports events, club memberships 2.1% 1.5% 4.0%
Other personal services (dry-cleaning, haircuts, legal services…) 1.6% -0.5% 2.3%
Public transportation (airline fares, etc.) 1.5% 0.7% 4.9%
Telephone & wireless services 1.5% 0.2% 0.0%
Lodging away from home, incl Hotels, motels 1.3% 1.4% 2.2%
Water, sewer, trash collection services 1.1% 0.7% 4.4%
Motor vehicle maintenance & repair 1.0% 0.5% 5.9%
Internet services 0.9% 1.1% -0.5%
Video and audio services, cable, streaming 0.8% 2.0% 3.2%
Pet services, including veterinary 0.5% 0.1% 5.9%
Tenants’ & Household insurance 0.4% 1.1% 2.1%
Car and truck rental 0.1% 1.7% -3.6%
Postage & delivery services 0.1% -1.2% 7.6%

The core services CPI overall has risen by 24% since January 2020.

Prices of Goods.

The used vehicle CPI jumped by 2.2% not annualized (29.7% annualized) in January from December, seasonally adjusted, the fifth month-to-month increase in a row, and the worst since May 2023 (red in the chart below).

Not seasonally adjusted, the index jumped 0.5% not annualized (6.5% annualized), though it would normally decline in January (blue).

The surge over the past five months has flipped the 10% year-over-year plunges in June and July into a year-over-year increase of 1.0%, the first year-over-year increase since October 2022 back when the historic price spike was unwinding.

The plunge of used vehicle retail prices from early 2022 through August 2024 was a powerful factor in the cooling of CPI inflation. But this U-turn has now become fuel for the re-acceleration of overall inflation, amid structurally tight retail inventories, strong demand, and surging wholesale prices.

Prices are still up by 33% from January 2020, and it now seems unlikely that they will give up more of the pandemic price spike.

New vehicles CPI edged up by a hair in January from December, seasonally adjusted. Not seasonally adjusted, the index rose by 0.26% (not annualized). This whittled down the year-over-year drop to just 0.3%.

New-vehicle prices have been sticky, unlike used-vehicle prices, despite abundant supply of new vehicles now on many lots, as automakers and dealers are trying to preserve their profit margins. The big incentives and discounts in recent months mostly just undid part of the increases in MSRPs. Since January 2020, the index is up 20.7%.

Durable Goods are dominated by new and used vehicles. Starting in mid- to late 2022, all major durable goods categories experienced price declines (deflation), off the price spike during the pandemic. But the month-to-month price drops in motor vehicles ended months ago, and prices have risen since then. And the other major categories of durable goods prices have slowed or ended their month-to-month declines:

Major durable goods categories MoM YoY
Durable goods overall 0.4% -1.2%
New vehicles 0.0% -0.3%
Used vehicles 2.2% 1.0%
Household furnishings (furniture, appliances, floor coverings, tools) -0.2% -0.9%
Sporting goods (bicycles, equipment, etc.) 0.2% -3.8%
Information technology (computers, smartphones, etc.) 0.0% -8.2%

Food Inflation.

The CPI for “Food at home” – purchased at stores and markets and eaten off premises – jumped by 5.7% annualized in January from December (+0.46% not annualized), the worst increase since October 2022.

This pushed the year-over-year price increase to 1.9%, the biggest increase since October 2023. Since January 2020, food prices have surged by 28%.

After a brief lull at painfully high price levels, food price inflation has been re-accelerating sharply for the past five months.

Part of this re-acceleration is due to the spiking prices for eggs, where the avian flu has been wreaking havoc since early 2024.

Beyond eggs, big month-to-month increases also occurred with beef, pork, fish and seafood, fresh fruit, and juices and nonalcoholic drinks.

MoM YoY
Food at home 0.5% 1.9%
Cereals, breads, bakery products -0.4% 0.4%
Beef and veal 0.7% 5.5%
Pork 0.7% 2.8%
Poultry -0.1% 0.4%
Fish and seafood 0.8% 0.9%
Eggs 15.2% 53.0%
Dairy and related products 0.3% 1.2%
Fresh fruits 0.5% 1.4%
Fresh vegetables -1.7% -0.6%
Juices and nonalcoholic drinks 1.1% 1.9%
Coffee, tea, etc. -0.1% 3.1%
Fats and oils 0.1% 0.4%
Baby food & formula -0.3% 1.1%
Alcoholic beverages at home 0.1% 0.8%

Apparel and footwear.

The CPI for apparel and footwear dropped by 1.4% (not annualized) in January from December, which reduced the year-over-year increase to 0.5%.

Energy.

The CPI for gasoline makes up about half of the overall energy CPI. It jumped 1.8% in January from December, seasonally adjusted, which about ended the year-over-year decline.

Not seasonally adjusted, gasoline also rose, when it normally declines during the low-demand winter months.

Compared to the peak in the summer of 2022, gasoline prices plunged by 28% seasonally adjusted (red), and by 36% not seasonally adjusted (blue). This had been a big factor in the deceleration of overall CPI inflation.

The CPI for energy, which covers energy products and services that consumers buy and pay for directly, including gasoline, jumped by 1.1% in January from December, and rose by 1.0% year-over-year, the first year-over-year gain since July.

CPI for Energy, by Category MoM YoY
Overall Energy CPI 1.1% 1.0%
Gasoline 1.8% -0.2%
Electricity service 0.3% 2.5%
Utility natural gas to home 1.8% 4.9%
Heating oil, propane, kerosene, firewood 4.1% -1.3%

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  44 comments for “Beneath the Skin of CPI Inflation: Worst Month-to-Month Acceleration of CPI since Aug 2023, on Spikes in Used Vehicles, Non-Housing Services, Food, Energy

  1. Franz G says:

    and yet stocks are barely affected. there is just too much money chasing too few assets, and every dip is seen as a buying opportunity. if a report like today doesn’t make it drop 2-3%, what will?

    i think it’s likely stocks don’t materially drop, but just trade sideways for the next 5-10 years.

    • Dumb Idiot says:

      Too much liquidity in the system and no exogenous shock ala 2008 to cause massive and immediate repricing.

      Maybe a couple bad hurricanes in a few key ports across the Gulf might do it? Best I can come up with. I’m buying Bitcoin still – entropic store of value, people!

      • VegLuv says:

        The price of the home that I was looking at buying in 2009/2010 in Southern Arizona hasn’t changed in value in 15 years (according to Zillow).

        As a Millennial, I am not getting the same deal that my parents got (not that I’m doing bad – But I’m the exception).

  2. Just dropping by says:

    Should be interesting to see the politics versus economics dynamics play out…

    Inflation is pretty hot, but Trump wants lower interest rates – If he gets what he wants with the Fed and short term rates, it’ll drive higher long-term rates which seems likely to do the opposite of what he’s hoping for…

    • Wolf Richter says:

      As we know from his billionaires that run the shop, Trump really wants lower LONG-TERM rates. The Fed’s policy rates don’t matter that much except for SOFR-linked floating rate loans. Most other debt is linked to long-term Treasury yields. If the 10-year yield rises, like it did today due to inflation, then long-term rates across the board are going to rise, and borrowing gets a lot more expensive (fixed-rate bonds and loans of all kinds).

      To get lower long-term rates, inflation must come down and stay down.

      • BillMc says:

        So what can being down inflation down at this point other than a recession?

        • David says:

          Maybe stop the printing presses?

        • Wolf Richter says:

          David,

          The printing presses have been turned into shredders and since mid-2022 have shredded $2.15 trillion of that printed US money. And there are also big shredders going BRRRR in other countries.

          Shredder goes BRRRR:

        • Rick Vincent says:

          I was about to ask this same question- it seems like inflation is entrenched and unless we get a shock to the economy, what The Fed is doing isn’t working anymore.

        • Domo says:

          Cheaper energy will bring costs down bigly. Reduced govt fraud and waste will help with funding and rates as well. Sounds like we are going to be getting cheap commodities from Ukraine which will go into the sovereign wealth fund and go towards lower taxes for working people.

          It’s a very clear path to prosperity from here and the stock market will bleed out as financialization dies and real honest work gets compensated.

        • Ben R says:

          Next level sarcasm Domo, you had me for a sec there 😂

      • Just dropping by says:

        Agree 100%

        That’s why the disconnect between economic reality and political theater has caught my attention…

        What Trump (and Co) really wants is long-term interest rates to come down, but when he’s talking about what the Fed can control, those are the short term rates.

        Still, here he is with the political theater:

        “Interest Rates should be lowered, something which would go hand in hand with upcoming Tariffs!!! Lets Rock and Roll, America!!!” the president said in a morning post on Truth Social

        • Pea Sea says:

          You were expecting coherence?

        • Jamie G says:

          Long-term lurker. My understanding is that the Fed won’t stop quantitative tightening or lower rates until the markets are showing signs of distress. What kind of stress are they looking for? Also, keeping rates high helps with inflation right?

        • Just stopping by says:

          “ You were expecting coherence?”

          Sadly, no – Mostly just pointing out the inconsistencies…

    • jon says:

      It’s interesting for sure.

      Trump is surrounded by Billionaires and people say he works for them.

      Trump is big Pro Tariffs. But Billionaires hate tariffs. Billionaires want all things to be made in cheaper location with no regard for human working condition or ecosystem.

      • Reality says:

        And consumers just want cheap goods at all cost, matter where it comes from or the inhumane conditions there.

        Humans kind of suck, not just billionaires.

  3. Jason says:

    Wait, you mean if you lower interest rates and the economy is roaring along, prices increase?!?! Whoa! Hold the presses! Someone please tell
    Jerome Powell. I don’t think he knew this!

    • Clykke says:

      Is it roaring though? A lot of sectors are still severely repressed compared to the 2010s. Hiring in some previously strong sectors (eg tech, finance) is nonexistent. It doesn’t feel like it is roaring, more that there is still too much liquidity and the inflation of 2021-2022 is still making its way through the system.

  4. Brahma says:

    Raise the interest rate!

  5. JT says:

    Wolf, Thanks again for a very informative report on inflation.

    I have a request: could you add a section on health insurance CPI? I’ve seen several tweets about how the BLS methodology for that sector is bizarre and has produced not-beievable decreases in the last few years. And it’s a big major part of the economy.

  6. Frosty says:

    Random tariff proposals are creating instability in businesses that import materials or products. Let’s be clear, China or Mexico do not pay the tariffs, it it the companies that import the products that pay. They either eat the costs or pass them on to the consumer. Then the nations hit retaliate. An example is China shifting their buying of soybeans, corn and wheat to Brazil or Argentina and American farmers having to be subsidized by the U.S. government. So the tariff angers the importers, the targeted country and the farmers. Argentina and Brazil won in the first round of tariffs back in 2018. U.S. manufacturers could not pass the costs on and their margins suffered. Our farmers saw prices collapse and the BRICS became an economic force. U.S. consumers used to import deflation by buying products that were subsidized by China. I’m not seeing much “Winning” in the first round of tariffs.
    No stability for our companies in this round as the only benefit can come from moving the manufacturing home and isolating the U.S. and its labor force from the world economy.
    I expect the CPI to go up from all of the tariffs and increased costs of building plants and sourcing materials from home.

    Time will tell…

    • BillMc says:

      Some vendors to my company are already imposed price increase in ANTICIPATION of tariffs.

      • Wolf Richter says:

        Change vendors on the spot.

        • BillMc says:

          Hard to change from using products from companies like Rockwell. I suspect that other industrials will be following suit. We’ll see how much we can pass on to our customers, but this will feed on itself.

    • jon says:

      “Time will tell…”

      I agree. Just a FYI, When Trump started tarrifs during his first term, the inflation didn’t increase.

      I support Trump on tarrifs and agree with WRs stance on this.

    • Publius says:

      Argentina’s crops aren’t looking good, barring some serious rain soon, so that might not be an option for everyone.

    • makruger says:

      This could get interesting if farm exports drop as the result of reciprocal tariffs while farm subsidies to US farmers also drop by way of Elon Musk’s chopping block. That could get a bit awkward for everyone since these very same folks are also likely to be staunch supporters of the current administration.

  7. Brewski says:

    Trump also wants a weaker dollar. He’ll push Powell hard for lower rates.

    B

    • Wolf Richter says:

      Biden got kicked out due to high inflation… Bidenflation. Trump will have Trumpflation to contend with if he does what you say, and people will hate him. He can see that too. His billionaire handlers that run the shop have already said that Trump actually wants low LONG-TERM rates, because they really matter, not the Fed’s short-term rates. And low long-term rates require low inflation. The Fed doesn’t set long-term rates, the market does. The 10-year yield (long-term rates) spiked 10 basis points today on this inflation data. Other long-term rates followed, including mortgage rates. And that really matters, not short-term rates.

      • Clykke says:

        Funny how we call it Bidenflation when nearly every western economy in the world had the same exact issues post-Covid.

        But that aside, facts matter much less to Trump and his followers. We’ve seen over and over again how republicans feel about the economy when a republican president is in vs how a democrat is in (and no its not nearly the same vice versa). In his first term he openly bragged about reducing the deficit when he did nothing of the sort.

        He’s playing nice now because its the start of his term but that position will erode the longer he is in power. He won’t be in a rush but he will want to reduce later.

      • Thurd2 says:

        When people talk about interest rates, they should clearly tell us if they are talking about short term or long term rates. These are different animals. With treasuries, the short term rates are determined by the Fed. The long term rates are determined by the market. Wolf has made this abundantly clear.

        Trump was probably talking about lowering long term rates, he being a real estate guy. But long term rates will not come down with inflation rearing its ugly head. Some suggest the Fed can lower inflation by slowing the economy by raising short term rates. So, in a way, Trump was indirectly asking the Fed to raise the Fed funds rate in an attempt to lower inflation, which will lower long term rates.

        • Just dropping by says:

          “ So, in a way, Trump was indirectly asking the Fed to raise the Fed funds rate in an attempt to lower inflation, which will lower long term rates”

          Seems like this is a fairly liberal (in the literal sense, not the political one, but I am appreciating the irony) and optimistic interpretation of the following statement from Trump…

          “Interest Rates should be lowered, something which would go hand in hand with upcoming Tariffs!!! Lets Rock and Roll, America!!!” the president said in a morning post on Truth Social

          In the context of his direct statement, he is clearly pushing for something to happen in the short term (hand-in-hand), not as a result of other, more indirect actions which might drive down rates in the longer-term…

          Trump seems to be a Rorschach test – he can say almost anything he wants, and then people (particularly his supporters) will often interpret it as something very different, but which conforms better with their own beliefs…

      • Milo says:

        I am wondering Powell keeps saying their target remains 2% inflation blah blah…
        But why no one asks him how many years have to pass and is he willing to wait to get to that goal?

        • Wolf Richter says:

          They’re not in a hurry to get there. They like where they are, higher inflation, higher rates, and higher economic growth than pre-pandemic. Higher inflation and higher economic growth are needed to deal with the huge government deficit and debt. And higher rates are the price to pay for it.

  8. Ambrose Bierce says:

    I dont drive much and I pay $1 a mile for insurance. On the plus side the hybrid I bought three years ago is still worth what I paid for it.

  9. American dream says:

    I would use the same word to describe this report as last months… Broad

    Increase almost everywhere. No rate cuts this year.. unless we see job market weakness then emergency 50bips cuts.

    I hope Trump actually sticks to doing tariffs but so far looks like a negotiating tactic.

  10. ShortTLT says:

    “The CPI for motor-vehicle maintenance & repair jumped by 6.2% annualized in January from December. Year-over-year, the index rose by 5.9%, the worst increase since May.”

    We need a reverse hendonic quality adjustment for this category to account for the horrible quality of shop labor these days.

    Not only have the prices gone up, but you get sloppy work – missing bolts, bolts not tightened down properly… reusing old drain/fill plugs and crush washers, or re-using bolts without cleaning off the rust… failing to grease or anti-sieze on rust-prone fittings… I could go on.

  11. Debt-Free-Bubba says:

    Howdy Folks. 2024 CPI 3.1 3.2 3.5 3.4 3.3 3.0 2.9 2.5 2.4 2.6 2.7 2.9 2.9

    2025 3.0. I was not surprised by CPI. Were You?

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