Markets remain overly optimistic about future inflation.
By David Enna, Tipswatch.com
The U.S. Treasury on Thursday will offer at auction $8 billion in a reopened 30-year Treasury Inflation-Protected Security, CUSIP 912810TY4. While most small-scale investors will shy away from this offering, one factor makes it interesting: a potentially low inflation breakeven rate.
The result will be a 29-year, 6-month TIPS. The coupon rate was set at 2.125% by the originating auction on Feb. 23, 2024, when investors in CUSIP 912810TY4 got a real yield to maturity of 2.20%, the highest in 14 years.
Since then, 30-year real yields have declined a bit. This TIPS trades on the secondary market, and on Friday it closed with a real yield to maturity of 2.06%, a bit below the coupon rate. It was trading at a premium price of 101.54.
Definition: The “real yield” of a TIPS is its yield above or below official future U.S. inflation, over the term of the TIPS. So a real yield of 2.06% means an investment in this TIPS will provide a return that exceeds U.S. inflation by 2.06% for 29 years, 6 months.
A 30-year Treasury of any kind is likely to be a highly volatile investment. Even small swings in market yields can send market value soaring up, or down. Here is the trend in the 30-year real yield over the last 4 1/2 years:
A 30-year real yield above 2.0% is attractive compared with trends over the last 14 years, and before that the Treasury did not offer 30-year TIPS from October 2001 to February 2010. In the late 1990s, auctioned 30-year real yields ran as high as 4.128%.
So … is 2.0%+ a “normal” or “attractive” 30-year real yield? I would say yes.
Inflation breakeven rate
The Treasury’s yield estimate for a 30-year nominal Treasury bond closed Friday at 4.15%. If you compare that to CUSIP 912810TY4’s real yield of 2.06%, you get a 30-year inflation breakeven rate of just 2.09%, a low number given current inflation trends. This means the TIPS will out-perform a nominal Treasury if inflation averages more than 2.09% over the next 29 years, 6 months.
Things will change before Thursday’s auction, but I’d say investors are underestimating future U.S. inflation. You could say, “But the Federal Reserve wants to keep inflation at 2.0%.” Sure, but that has been the Fed’s goal for more than a dozen years. Since that goal was set, annual inflation has been low (0.7% in 2015) and high ( 7.0% in 2021), but has averaged an annual rate of 2.6%.
Here is a chart showing 30-year average inflation rates going back to periods beginning in 1971. Not one 30-year period has had an inflation rate below 2.20.%
A low inflation breakeven rate does not guarantee that a TIPS will be a good long-term investment, but it does indicate it will likely out-perform a 30-year nominal Treasury.
We’ve seen very low 30-year breakeven rates at auctions in recent years, as low as 1.52% for a 30-year TIPS originating auction in February 2016. That particular TIPS has been a dud (it’s currently trading with a price of about 81.65). But with its auctioned real yield of 1.120% it is definitely out-performing a 30-year bond from February 2016, with a nominal yield of just 2.64%.
Here is the trend in the 30-year inflation breakeven rate over the last 4 1/2 years, showing the recent dip lower:

Pricing
CUSIP 912810TY4 closed Friday on the secondary market with a price of 101.54. You can track that in real time on Bloomberg’s U.S. Yields page. On the settlement date of Aug. 30 it will have an inflation index of 1.02367. So investors will be buying about 2.4% additional principal at a slightly premium price. Here is how a $10,000 par investment could look:
- Par value purchase: $10,000
- Actual principal purchased: $10,000 x 1.02367 = $10,236.70
- Cost of investment: $10,236.70 x 1.0154 = $10,395.35
- + Accrued interest: About $8.87
In summary, an investor purchasing $10,000 par value of this TIPS could pay about $10,395 for $10,237 in principal and then earn a coupon rate of 2.125% + inflation accruals over the next 29 years, 6 month. All of this will change by Thursday’s auction, but this provides a rough estimate.
Final thoughts
A low inflation breakeven rate doesn’t guarantee a top-notch TIPS investment. What a 30-year TIPS investor would like to see is: 1) a historically strong real yield to maturity, and 2) a historically low inflation breakeven rate. So this TIPS qualifies for anyone willing to venture into 30-year volatility.
I won’t be a buyer because the 30-year term falls outside my likely lifespan (I would be 100 years old in February 2054) and my style of TIPS investing is buy-and-hold to maturity. It could be a candidate for the top-end of a TIPS ladder for a younger investor. And because of its potential volatility TIPS traders may want to jump aboard.
I’d expect continued volatility in real yields in the days leading up to Thursday’s auction, so any investor should keep an eye on the Bloomberg U.S. Yields page. And of course this TIPS could be purchased at any time on the secondary market, if you see a yield you like.
This TIPS auction closes Thursday at 1 p.m. ET. Non-competitive bids at TreasuryDirect must be placed by noon Thursday. If you are putting an order in through a brokerage, make sure to place your order Wednesday or very early Thursday, because brokers cut off auction orders before the noon deadline.
I plan on posting the results after the auction’s close. Meanwhile, here is a history of recent 29- to 30-year TIPS auctions. Notice that just three years ago the auctioned real yield was -0.292%, the lowest in history for this term:
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• Now is an ideal time to build a TIPS ladder
• Confused by TIPS? Read my Q&A on TIPS
• TIPS in depth: Understand the language
• TIPS on the secondary market: Things to consider
• TIPS investor: Don’t over-think the threat of deflation
• Upcoming schedule of TIPS auctions
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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.
















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