October 24, 2025

The CPI rose 0.3% in September after climbing 0.4% in August The year-over-year increase is 3.0%.  We now expect the overall CPI to increase 2.9% in 2025 and the same 2.9% in 2026.

Food prices rose 0.2% in September after jumping 0.5% in August.  In the past year food prices have risen 3.1%.  Economists typically subtract food and energy prices from the CPI and focus on the so-called “core” rate of inflation.  That is because these two categories are extremely volatile.  They might go up for a few months but then reverse direction and decline almost as quickly as they rose.

Energy prices rose 1.5% in September after increasing 0,7% in August.   In the past year they have risen 2.9%.

The core CPI rose 0.2% in September after gaining 0.3% in both July and August.   The  year-over-year increase stands at 3.0%.  We expect the core CPI to increase 3.0% in 2025 and 2.7% in 2026.

At the moment, goods sector inflation has increased slightly  in the past year as consumers have been spending less money on goods but more on services. Core goods sector inflation has risen 1.5% in the past year.  However, inflation in the core service sector (which is twice the size of the goods sector) has been steadily rising and has climbed 3.5% in the past year.  This is important because services make up two-thirds of the entire CPI.

Prices in the service sector are to a large extent being driven by housing.  Home prices are still rising on a year-over-year basis, but they have begun to fall slightly in the past couple of months..

The shelter component of the CPI rose 0.2% in September after climbing 0.4% in August.  The year-over-year increase now stands at 3.6%. This is a big deal because rents represent one-third of the entire CPI index.  We expect the shelter component to slow gradually throughout the remainder of 2025 to 3.2% and slow further to 2.4% in 2026

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This is because there is a good correlation between the shelter component of the CPI and what happened to the Case Shiller index of home prices with a lag of about 15 months. This means that the shelter component should slow as the year progresses from 3.6% today to 3.2% by the end of  2025 and perhaps 2.4% in 2026  which is one reason that the core inflation rate could shrink somewhat in the months ahead.

The two of the worst performing service sector components in recent months have been automobile insurance and auto repairs which in the past year have risen 3.1% and 11.5%, respectively.  With respect to the automobile insurance category, higher car prices, rising car repair costs (largely labor), an increase in disaster-related claims, and theft and vandalism in high crime areas of big cities are the primary factors behind the gain.  The good news is that this category has begun to slow sharply in rfecent months.  Auto repairs continue to climb at a double-digit pace.

Typically, M-2 rises at about a 6.0% pace.  But when the Fed purchased $4.0 trillion of government securities back in the spring of 2020, money growth soared.  It continued to grow rapidly right up through March of 2022.  Since then the Fed has been shrinking its portfolio and that has caused the money supply to decline.  Currently, the level of M-2 stands $0.3 trillion higher than its desired 6.0% growth path.  That means that the economy currently has $0.3 trillion more liquidity than it needs.  If the Fed continues to shrink its portfolio the excess liquidity should be nearly eliminated  in the months ahead which should allow the inflation rate to continue to shrink.

We expect the core CPI to increase 3.0% in 2025 and 2.7% in 2026.  The core personal consumption expenditures deflator should increase  3.0% in 2025 and 2.5% in 2026.  This is the inflation measure the Fed would like to increase by 2.0%.

Stephen Slifer

NumberNomics

Charleston, SC