30 years is a difficult maturity for a small-scale investor.

By David Enna, Tipswatch.com
The Treasury on Thursday will auction $8 billion of a reopened 30-year Treasury Inflation-Protected Security, CUSIP 912810US5. This will be a relatively historic event because the auction is very likely to generate the highest real yield for this term at auction since October 2001, nearly 25 years ago.
Of course, the Treasury stopped issuing the 30-year TIPS right after that 2001 auction, which generated a real yield to maturity of 3.465%. I guess long-term TIPS were getting too expensive for the Treasury? Issuance resumed in February 2010, nearly nine years later.
CUSIP 912810US5 had its originating auction on Feb. 19, 2026, when it generated a real yield to maturity of 2.473%. Its coupon rate was set at 2.375%. Thursday’s auction sets the term at 29 years, 6 months.
The auction looks likely to get a substantially higher real yield. CUSIP 912810US5 trades on the secondary market, where it closed Friday with a real yield of 3.02%. That is significant. If it carries through to Thursday’s auction, it would crash through the previous post-2010 high of 2.650%, set at last year’s August auction.
Definition: The “real yield to maturity” of a TIPS is its yield above future U.S. inflation, over the term of the TIPS. So a real yield of 3.02% means an investment in this TIPS would provide a return that exceeds official U.S. inflation by 3.02% for 29 years, 6 months.
For years, TIPS investors have dreamed about getting a 3% real yield long term. Now that day has arrived. Here is the trend in the 30-year real yield over the last 16 years:
Here’s another chart, comparing historic 30-year nominal Treasury bond yields with the current 3% real yield of a 30-year TIPS. Note how frequently the nominal yield dipped below the current real yield of 3%. Again, this is significant. (Although I don’t foresee nominal 30-year yields dipping below 3% anytime soon.)
All of this reinforces the idea that Thursday’s 30-year reopening TIPS auction has great appeal. But …
The negatives
A 30-year bond of any type is going to be highly volatile. For example, CUSIP 912810US5 was issued in February with a coupon rate of 2.375%. Today, six months, later, it is trading with a price of about 87.41, meaning it has lost more than 12% of its value in six months.
Another example: A disastrous 30-year TIPS issued in February 2021 got a real yield of -0.04% and its coupon rate was set at 0.125%. Today, that TIPS along with its accrued inflation is trading with a price of about 49.65, meaning it has lost half its value if sold today.
If you are a TIPS trader, that volatility can work for you, or against you. Jumping into a 30-year bond is a gamble. If it ends up that 3% is the real-yield peak for this cycle, a trader could end up getting a nice profit. But we can’t predict the future. The current trend in yields is higher.
TIPS are best purchased, I believe, with a strong intention to hold to maturity. Also, for such a long maturity, a tax-deferred account is the best location for the investment, for most investors.
Pricing
As of Friday’s close, CUSIP 912810US5 was trading with a price of 87.41 and it will carry an inflation index of 1.03055 on the settlement date of August 31. With that information, we can estimate the cost of a $10,000 par value purchase:
- Par value: $10,000.
- Principal purchased on settlement date: $10,000 x 1.03055 = $10,305.50.
- Cost of investment: $10,305.50 x 0.8741 = $9,008.04.
- Plus accrued interest of about $10.64.
In summary, if Friday’s market conditions continue, an investor would pay $9,008.04 for $10,305.50 of principal on the settlement date. From then on, the investor would earn accruals matching future inflation, plus an annual coupon rate of 2.375% on adjusted principal for 29 years, 6 months. The accrued interest would be returned at the February 2027 coupon payment.
This is an estimate. Market conditions will change by Thursday.
Inflation breakeven rate
With the 30-year nominal Treasury closing Friday at 5.26%, this TIPS currently has an inflation breakeven rate of 2.24%, somewhat high historically but perfectly reasonable considering long-term inflationary trends. Over the last 30 years, ending in July, inflation has averaged 2.5%.
Here is the trend in the 30-year inflation breakeven rate over the last 16 years, showing the remarkably stable trend recently hovering around 2.2%:

Thoughts
CUSIP 912810US5 is a fascinating investment, and attractive by historical standards. But will we continue to see rising longer-term nominal and real yields? It’s possible — and that’s the risk for such a potentially volatile investment.
On the other hand, for a buy-and-hold investor looking to build a TIPS ladder out to 2056, getting close to a 3% real yield is extremely attractive.
CUSIP 912810US5 trades on the secondary market and can be purchased at any time in a brokerage account. There is no need to focus on Thursday’s auction if you see a real yield you like on the secondary market. I suspect, however, that 30-year TIPS are fairly lightly traded in small lots. Bid-ask spreads could be a problem.
The advantage of buying at auction, especially through TreasuryDirect, is that even small-lot purchases will get the auction’s high yield. The advantage of the secondary market is that you can see exactly the price and real yield you will be receiving.
I won’t be a buyer at this auction, since I will be “long gone” at maturity in 2056.
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.
Note: On Thursday I will be driving into Tennessee to attend a memorial service. I expect I will be late posting the auction results, possibly very late. You can find the auction result announcement on this page after the 1 p.m. close.
In the meantime, here is a history of auction results for this term over the last 5 years:
• 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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