Is inflation really slowing? And what does this mean for I Bonds, TIPS and the Social Security COLA?
By David Enna, Tipswatch.com
The July inflation report provides evidence that U.S. inflation is gradually slowing, which should be good news for financial markets and the Federal Reserve.
The Consumer Price Index for All Urban Consumers increased 0.1% on a seasonally adjusted basis in July after falling 0.4% in June, the Bureau of Labor Statistics reported. Over the last 12 months, the all-items index increased 3.4%, down from 3.5% in June.
Core inflation, which removes food and energy, ran at 0.2% for the month and 2.5% for the year, down from 2.6% from June. All of these numbers matched economist expectations.
While it might appear to most drivers that gasoline prices increased in July as the war in Iran escalated, the BLS reported that gas prices fell 2.9% for the month, after falling 9.5% in June. I’d expect this reflects averaging over the month, so the August report should show an increase.
Gas prices have increased 24.7% over the last year. Here are other items from the report:
- Food at home costs decreased 0.1% for the month are up 2.7% for the year.
- Egg prices fell 0.5% in July and are down 25.7% for the year.
- Lettuce prices fell 16.4% for the month, thanks to the cyclospora outbreak.
- Shelter costs increased 0.1% for month, which the BLS said accounted for about two-thirds of the all-items total.
- The overall energy index fell 1.5% for the month.
- Apparel prices increased 0.1% for the month and 3.9% for the year.
- Costs of medical care services increased 0.6% for the month and are up 2.7% for the year.
- Airline fares increased 2.2% for the month and are up 25.5% for the year.
- Prices for new vehicles rose 0.1% for the month and 0.5% for the year.
- Costs of used vehicles increased 0.4% for the month, but are down 1.9% for the year.
Overall, like in June, this is a tame inflation report. While the annual rates of increase remain too high, U.S. inflation appears to be trending lower. The big question: Can this continue through a summer of potential supply shocks from the Mideast? Here is the 12-month trend in all-items and core inflation:
What this means for TIPS and I Bonds
Investors in Treasury Inflation-Protected Securities and Series I Savings Bonds are also interested in non-seasonally adjusted inflation, which is used to adjust principal balances for TIPS and set future interest rates for I Bonds. For July, the BLS set the inflation index at 333.918, a decrease of 0.01% from June.
For TIPS. The July inflation report means that principal balances for TIPS will decline 0.01% in September after falling 0.35% in August. For the 12 months ending in September, principal balances will have increased 3.4%. Here are the new September inflation indexes for all TIPS.
For I Bonds. July marks the fourth month in a six-month string that will determine the I Bond’s new variable rate, to be reset November 1. So far, with two months remaining, inflation has increased 1.12%, which translates to a variable rate of 2.24%. Two months remain. I would guess we will end up with a variable rate of about 3%, down from the current 3.34%. Here are the data so far:

Social Security COLA
The Social Security cost-of-living adjustment is based on an unusual inflation index – CPI-W – and is determined by averaging the indexes for July, August, and September and comparing that number to the same average for the year before. For July, the BLS set the CPI-W index at 327.104, essentially no higher than the 327.075 recorded for June.
My projection for the 2027 COLA was 3.6%, lower than the number estimated by most other forecasters. We all might be too high, but 3.6% remains possible. Here are the data:
What this means for future interest rates
There seems to be growing support among Federal Reserve hawks for preemptive interest rate increases in coming months. I think the mild July inflation report should slow things down. It’s time to wait and watch: Is inflation truly declining? Is the U.S. labor market softening?
So I would think the Fed has a chance to stay on hold through early fall, at least.
In its morning report, Bloomberg called July inflation “subdued,” and noted:
“The big surprise with a report that had no surprises (all of the data came perfectly in line with the estimates) is that a situation where inflation isn’t reaccelerating, coupled with the most recent, weak jobs report gives the Fed more time to wait,” Chris Zaccarelli, the chief investment officer at Northlight Asset Management, said in a note. …
Also this, from Bloomberg economists Anna Wong and Troy Durie:
“July’s CPI report was modest enough to lower chances of a September rate hike, but not low enough to write it off completely. With core CPI matching its five-year low from February, and July payrolls declining, it’s hard to make an urgent case to hike.”
I would guess we will end up seeing at least a minor acceleration in inflation for August and September. But so far, the trend looks relatively mild. Core inflation at 2.5% remains too high, but it is starting to look “normal” in very un-normal times.
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