A 76-Year-Old Grandfather Will Lock $400,000 in a 30-Year Treasury at 5.6% ‘for the Grandkids.’ His Daughter Will Be the One Holding It When Rates Move
Locking $400,000 into a 30-year Treasury sounds like a gift to the grandkids, but the person who will actually decide what happens to that money when rates move may never have agreed to the plan.
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A 76-year-old grandfather plans to invest $400,000 in a 30-year Treasury bond paying 5.6% and set it aside for his grandchildren, meaning it would mature when he turns 106. In practice, his daughter will likely inherit it partway through and then decide whether to hold it, sell it, or split it among the kids. Whatever she decides, she will get that day’s market price.
Many retirees are considering the same move after long-term yields rose this fall. MarketWatch covered the topic in August under the headline “Buying 30-year bonds? Locking in today’s rates could hurt your retirement planning,” focusing on the interest-rate risk that comes with long maturities.
A 5.6% Coupon Was Available Only Briefly
The 30-year Treasury yield was 5.6% on October 8 and 9, having peaked at 5.7% earlier that week and since falling to 5.29%. The 10-year yield dropped below 5%. Political turmoil in France drove investors toward safer assets, and economists still expect the Fed to raise rates again in December (WSJ, Reuters).
On a $400,000 bond, a 5.6% coupon pays $22,400 a year, and that amount never changes. On the plus side, this interest is also exempt from state income tax.
Rate Moves Hit Whoever Holds the Bond
The main problem is the mismatch between a 30-year maturity and the owner’s remaining life, since holding to maturity removes price risk only for the person who actually holds the bond until it matures.
A 30-year bond’s price moves sharply when rates change. If yields rise one percentage point to 6.6%, a $400,000 bond with a 5.6% coupon would be worth about $348,000, roughly $52,000 less than he paid. If yields fall to 4.6%, it would be worth about $465,000. A bond bought at 5.6% two weeks ago would already be worth about $419,000 at today’s yield.
Under federal tax law, inherited property takes a basis equal to its fair market value at the date of the decedent’s death (26 U.S.C. § 1014(a)(1)). If the bond is worth less than he paid when he dies, the daughter’s basis resets to that lower value. Nobody ever subtracts the loss.
Another consideration is that federal estate tax probably won’t apply. The 2026 basic exclusion is $15,000,000, and only 7,195 estate tax returns were filed in 2024. For most families, the real issues are who controls the money and how easily they can turn it into cash.
Inflation also matters, since prices for Americans 62 and older rose 4% over the past year, while the coupon stays fixed for three decades. A 30-year inflation-protected Treasury (TIPS) currently offers a real yield of 3.05%, meaning a return of about 3% above inflation.
Two Approaches That Fit the Goal Better
For most people in this situation, a 30-year bond held in the grandfather’s own name may be the weakest choice, as it carries the most rate risk, pays no more than a shorter bond, and leaves the final decision to someone else. The 20-year Treasury yields 5.32%, slightly more than the 30-year.
Path One: Give the Money While He’s Alive
The annual gift exclusion is $19,000 per recipient in 2026. Gifts must give the recipient a present interest, because gifts of future interests do not qualify (26 U.S.C. § 2503(b)(1)). Larger gifts use up part of the lifetime exclusion. They require a gift tax return but create no tax for an estate well below the threshold.
He could put the money into 529 plans or custodial accounts and choose maturities that align with each grandchild’s college or early-adult years. The daughter no longer has to decide anything, and he can watch the money get used.
Path Two: Shorter Bonds That Pass Directly
If he wants to keep the income and stay in control, a ladder of Treasuries maturing over 5 to 20 years spreads out the timing. The 5-year yields 4.8% and the 10-year yields 5.0%. As each bond matures, the money comes back at full face value and can be reinvested. He can also name the grandchildren as transfer-on-death beneficiaries on the account, so the bonds pass directly to them and never go through the daughter.
Decide Ownership Before Picking a Yield
First, decide who should own the money and when they should get it. Beneficiary designations, titling, and account structure determine more of the outcome than the gap between 5.29% and 5.6%, and most estate messes trace back to one of those three. We put the full checklist in a free estate guide here.
A common mistake is treating a 30-year Treasury as risk-free because you can hold it to maturity, yet at 76, he probably won’t be the one holding it on the maturity date. The bond’s value at his death, and that week’s market level, will determine what his daughter has to work with.
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David Beren has been a Flywheel Publishing contributor since 2022. Writing for 24/7 Wall St. since 2023, David loves to write about topics of all shapes and sizes. As a technology expert, David focuses heavily on consumer electronics brands, automobiles, and general technology. He has previously written for LifeWire, formerly About.com. As a part-time freelance writer, David’s “day job” has been working on and leading social media for multiple Fortune 100 brands. David loves the flexibility of this field and its ability to reach customers exactly where they like to spend their time. Additionally, David previously published his own blog, TmoNews.com, which reached 3 million readers in its first year. In addition to freelance and social media work, David loves to spend time with his family and children and relive the glory days of video game consoles by playing any retro game console he can get his hands on.
