Core inflation, however, remains stubbornly high at 5.3%.
By David Enna, Tipswatch.com
The May inflation report, just released by the Bureau of Labor Statistics, brought some welcome news with seasonally-adjusted prices rising just 0.1% for the month and 4.0% year over year, down from a high of 9.1% in June 2022.
Those numbers came in below expectations, but many economists had shifted their estimates slightly lower, so this was not a surprise. Core inflation, which removes food and energy, came in at 0.4% for the month and 5.3% for the year, matching expectations.
The 4.0% annual inflation rate is the smallest increase recorded since May 2021.
This report is a mixed bag. All-items inflation is falling (partly because of very high inflation numbers a year ago) but core inflation is remaining unacceptably high, and surprisingly stable.
Gasoline prices fell 5.6% in May, after rising 3% in April, and are now down 19.7% year-over-year. Prices for the entire energy sector are down 11.7% for the year, a huge factor in the trend of moderating all-items inflation. Other highlights:
- Food at home costs rose just 0.1% for the month and are now up 5.8% year-over year. This is a positive trend for American consumers.
- Shelter costs rose 0.6% for the month and 8.0% year over year. The BLS said shelter costs were the largest factor to the increase in core inflation. Rent costs rose 0.5% for the month.
- The index for used cars and trucks increased 4.4% for the month, but is down 4.2% year over year.
- New vehicle prices fell 0.1% for the month.
- The costs of medical care services fell 0.1% for the month and are down 0.1% year over year.
Here are the 12-month trends in all-items and core inflation, showing the steady decline in overall inflation even as core inflation remains relatively stable above 5.0%:

The decline in the annual inflation rate should continue through June, because U.S. inflation increased 1.37% in June 2022, a shockingly high number. So we should see the official U.S. inflation rate dip below 4.0% in the June report, but after that it should stabilize or potentially rise because year-ago numbers cooled off dramatically from July to the end of 2022.
So while today’s numbers mark a positive trend, in a few months we could see that trend reversing, with U.S. annual inflation inching higher or even moving sharply higher if energy prices reverse.
What this means for TIPS and I Bonds
Investors in Treasury-Inflation Protected Securities and U.S. Series I Savings Bonds are also interested in non-seasonally adjusted inflation, which is used to adjust principal balances on TIPS and set future interest rates for I Bonds. For May, the BLS set the CPI-U inflation index at 304.127, an increase of 0.25% over the April number.
For TIPS. The May inflation report means that principal balances for all TIPS will increase 0.25% in July, after increasing 0.51% in June. Here are the new July Inflation Indexes for all TIPS.
For I Bonds. The May inflation report is the second of a six-month string that will determine the I Bond’s new variable rate, which will be reset November 1. So far, inflation has increased 0.76% in that period, which translates to a variable rate of 1.52%. But four months remain.
Also, in the July to December period, you can expect non-seasonally adjusted inflation to run slightly lower than the official seasonally-adjusted numbers. This happens every year. Here are the numbers I am tracking:

What this means for future interest rates
My immediate reaction is that the Federal Reserve can go ahead with its planned one-month pause in raising interest rates. That announcement is coming tomorrow. Today’s inflation report matched expectations. But there is nothing here to celebrate, given that core inflation remains stubbornly high and the inflation trend from July through the end of 2023 could move higher.
After this one-month pause, who knows? The June inflation report, coming July 12, is likely to look benign, which would leave the door open for a longer or even permanent pause. From this morning’s Bloomberg report:
“This is a pretty good print in terms of signaling that we are likely to see the core CPI soften materially starting next month,” Omair Sharif, president of Inflation Insights LLC, said in a note. “The way things are going now, I suspect we’ll see a soft core that will tamp down odds of a July hike.”
A lot will depend on the price trend later in 2023. It seems likely the Fed has not yet hit its “terminal rate,” and is highly unlikely to begin cutting interest rates this year.
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David Enna is a financial journalist, not a financial adviser. He is not selling or profiting from any investment discussed. I Bonds and TIPS are not “get rich” investments; they are best used for capital preservation and inflation protection. They can be purchased through the Treasury or other providers without fees, commissions or carrying charges. Please do your own research before investing.











Dr, it's not clear to whom your comment addressed, nor clear (at least to me, sorry) what it's supposed to…