By David Enna, Tipswatch.com
As expected, rising gasoline prices pushed U.S. inflation higher in August, rising a seasonally-adjusted 0.6% for the month and increasing 3.7% year-over-year, the Bureau of Labor Statistics reported today.
Core inflation, which removes food and energy, rose 0.3% for the month (higher than the expected 0.2%) but annual core came in at 4.3%, lower than the expected 4.4%. That most likely means core inflation was close to expectations, before rounding.
Nothing too shocking here, but the bump higher in annual all-items inflation from 3.2% in July to 3.7% in August is certainly an unwanted trend. Gas prices are felt immediately by the consumer, something the Fed and Biden administration can’t ignore.
The BLS noted that the rise in gasoline prices (up 10.6% for the month but still down 3.3% year over year) accounted for more than half the all-items increase in inflation. Shelter costs were the largest factor in core inflation, increasing 0.3% for the month and 7.3% for the year. Shelter costs have increased 40 consecutive months, the BLS said. Other items from the report:
- Food at home prices rose a moderate 0.2% and are now up 3.0% year over year.
- The index for dairy decreased 0.4%.
- The energy index as a whole was up 5.6% for the month.
- Apparel costs rose 0.2%.
- The index for hospital services rose 0.7%.
- Prescription drug costs rose 0.4%.
- Costs of motor vehicle insurance rose 2.0%, the biggest one month jump since 1976.
- Airline fares declined 8.1% but are still up 4.9% year over year.
August’s price increases came a year after inflation slowed dramatically in 2022, primarily triggered by a deep fall in gasoline prices. Now that trend is reversing. Here is the 12-month trend for all-items and core inflation, showing that core inflation continues to gradually fall while the trend has turned upward for all-items inflation:

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 for TIPS and set future interest rates for I Bonds. For August, the BLS set the inflation index at 307.026, an increase of 0.44% over the July number.
For TIPS. The August inflation index means that principal balances for TIPS will increase 0.44% in October, after rising 0.19% in September. Here are the new October Inflation Indexes for all TIPS.
For I Bonds. The August inflation report is the 5th of a 6-month string that will set the I Bond’s new inflation-adjusted variable rate, which will be reset Nov. 1 for all I Bonds (the starting date depends on the original month of purchase). Inflation from April to August has increased 1.72%, which at this point would translate to a variable rate of 3.44%. But one month remains.
If non-seasonal inflation increases 0.2% in September, you’d get a variable rate of 3.84%, higher than the current 3.38%. Nothing is certain, of course.
Here are the data so far:

What this means for Social Security COLA
The Social Security Administration uses a different inflation index — CPI-W — to determine the next year’s cost-of-living-adjustment. And it looks only at the average of three months of data, from July to September. For August, the BLS set the CPI-W index at 301.551, an increase of 3.4% over the last year.
For the COLA, the only 2022 number that matters is the three-month average from July to September 2022, which was 291.901. The average of the July and August CPI-W indexes was 3.0% higher. One month of data remain. I have been projecting an increase in the range of 3.0% to 3.2%, which could end up a bit too low.

What this means for future interest rates
The Federal Reserve has consistently signaled that it plans to hold short-term interest rates steady at its Sept. 19-20 meeting of the Federal Open Market Committee. While this August inflation report could deliver a psychological jolt to the U.S. consumer, the Fed will probably view it as “expected.”
However, core inflation of 4.3% is unacceptably high, so the Fed must continue its commitment to keeping rates at high levels, probably well into 2024. From today’s Bloomberg report:
The report complicates the picture for Fed policymakers, who meet later this month to set rate policy. While they’re likely to look through a temporary bump in energy prices, the shelter component is still running hot and gains across other categories could give them pause. The broader economic picture could also support another hike: The labor market, while showing cracks on the margin, remains tight.
From the Wall Street Journal:
Fed officials signaled last week they were preparing to hold interest rates steady at their meeting next week, and Wednesday’s inflation report isn’t likely to change that outcome. Whether it is enough to lead officials to raise interest rates again in November or December largely depends on whether inflation firms up in the coming months.
If gas prices continue to rise and eventually spread an inflationary effect to food and transportation costs, the American consumer will feel the pinch. And demands for higher wages would likely follow. That is something the Fed won’t be able to ignore.
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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.
















I do have heirs... so I try and purchase long term bonds in my IRA's that will mature no later…