When real yields rise, existing TIPS usually lose market value, just as existing nominal Treasury bonds lose value when their nominal yields rise. TIPS are not immune to interest-rate risk: their principal and coupon adjust with CPI-U, but a higher required real yield still pushes the price of an already-issued bond down. Whether TIPS or nominal Treasuries are the better new purchase depends on the matched-maturity yields, the implied breakeven inflation rate, your holding period, and whether you need inflation-linked or fixed-dollar cash flows.
What rising real yields actually mean
A real yield is the market yield quoted on an inflation-protected Treasury after stripping out the inflation adjustment built into the security. It is not a statement that consumer prices are falling, nor does it mean inflation is necessarily low. It means investors now require a higher return measured in inflation-adjusted terms.
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Bond prices and yields move in opposite directions. If a newly issued TIPS offers a higher real yield than an older TIPS, the older issue must generally trade at a lower price so that a buyer at the new price can earn a competitive real return. The same logic applies to nominal Treasuries, except their relevant yield is nominal and their contractual payments are fixed dollars.
The CPI adjustment and market repricing are separate effects. A TIPS can continue to receive CPI-U principal adjustments while its quoted market price falls because real yields increased. An investor who holds to maturity may experience a different result from an investor who sells during the price decline.
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How TIPS cash flows work
Principal is indexed to CPI-U
The U.S. Treasury adjusts TIPS principal using the Consumer Price Index for All Urban Consumers (CPI-U). The coupon rate is fixed when the security is issued, but that rate is applied to the inflation-adjusted principal. Consequently, the dollar coupon payment can rise or fall as the adjusted principal changes.
When CPI-U rises, adjusted principal generally rises and the coupon paid in dollars generally rises with it. If the index declines, the adjusted principal and dollar coupon can decline during the life of the bond. These indexation changes affect the cash flows, while changes in the required real yield affect the market price.
The maturity floor is not a price guarantee
At maturity, Treasury pays the inflation-adjusted principal or the original principal, whichever is greater. TreasuryDirect states: “When a TIPS matures, you get either the increased (inflation-adjusted) price or the original principal, whichever is greater.” That protection applies to the maturity payment, not to a sale before maturity.
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Before maturity, a TIPS can trade below the amount originally invested. If real yields rise and you sell, you can realize a capital loss even though the security retains its maturity floor. The floor therefore addresses the principal repayment at maturity; it does not eliminate interim market-price risk or guarantee that you can exit at par.
How nominal Treasury bonds differ
A nominal Treasury promises predetermined dollar coupons and principal payments. The contract does not increase those payments when CPI-U rises. Inflation can therefore reduce the purchasing power of each future dollar, even when the Treasury makes every payment on time.
Nominal Treasury prices respond to changes in nominal yields. If nominal yields rise, an existing bond with a lower coupon generally falls in price. If nominal yields fall, the existing bond generally rises in price. A change in real yields can occur alongside a change in nominal yields, but the size and timing of the nominal move depend on inflation expectations and other market pricing components. A rise in real yields does not mechanically guarantee an equal rise in nominal yields.
Why existing TIPS fall when real yields rise
Suppose an older TIPS was issued when investors accepted a lower real yield. If market real yields later increase, a buyer will prefer a newer issue or newly auctioned security offering the higher real return. To compete, the older TIPS must sell at a discount. The discount raises the buyer’s yield to the prevailing real-yield level.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsThe price response is stronger for securities with more time until maturity because more of their cash flows are exposed to the new yield. This is the role of duration: longer-duration bonds are generally more sensitive to a given yield change than shorter-duration bonds. The exact price move depends on the individual security’s cash flows, coupon, maturity, index ratio, and market liquidity; no universal percentage decline can be inferred from the direction of yields alone.
A TIPS holder who does not sell may continue receiving CPI-linked adjustments and coupons. A holder who must sell to raise cash has to accept the market price available at that time. Your economic outcome therefore depends on both the security’s cash flows and whether your investment horizon matches its maturity.
Breakeven inflation: the central comparison measure
The basic calculation
For securities with the same maturity, the approximate breakeven inflation rate is:
Breakeven inflation = nominal Treasury yield − TIPS real yield
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Why breakeven is not a forecast
Breakeven inflation is a market pricing measure, not a promise about future CPI-U. Yields contain risk and liquidity premiums, and the inflation-protection feature itself can trade differently from a nominal bond. Federal Reserve fitted-yield and inflation-compensation series are estimates that can be revised. A quoted breakeven also reflects the exact maturities and instruments selected, so comparing unmatched terms can produce a misleading number.
Use breakeven as one input to a decision, not as a certain prediction. It tells you what inflation compensation is embedded in market prices on that date; it does not tell you what inflation will actually be.
A matched comparison framework
Compare a TIPS and a nominal Treasury with similar maturity and, where possible, similar duration. Then evaluate the following dimensions together.
| Question | TIPS | Nominal Treasury |
|---|---|---|
| What does the quoted yield represent? | A real yield, stated after accounting for the security’s CPI-U indexation. | A nominal yield on fixed-dollar cash flows. |
| How do payments respond to inflation? | Principal is adjusted using CPI-U; the fixed coupon rate is applied to the adjusted principal. | Contractual coupon and principal amounts do not rise with CPI. |
| What happens if required real yields rise? | Existing market prices generally fall. | The effect is indirect; price responds to the change in nominal yields, not the real-yield move alone. |
| What happens if inflation is higher than expected? | Higher CPI-U generally increases adjusted principal and dollar coupons. | Payments remain fixed in dollars, so purchasing power is reduced. |
| What protection exists at maturity? | Treasury pays adjusted principal or original principal, whichever is greater. | Contractual principal is the stated dollar amount. |
| What if you sell before maturity? | Market price can be below your purchase price; the maturity floor does not apply to an early sale. | Market price can also be below your purchase price if nominal yields rose. |
How to decide when real yields are rising
1. Define the cash-flow objective
Choose whether your priority is purchasing-power protection or a known schedule of dollars. TIPS are designed for cash flows that adjust with CPI-U. Nominal Treasuries are designed for predetermined dollar payments. Neither objective is universally superior; the right choice depends on what your future spending requires.
2. Match the maturity to the horizon
Identify when you expect to need the money. A security maturing near that date reduces the need to sell into an unknown market price. If you may need the funds earlier, treat both TIPS and nominal Treasuries as marketable securities whose values can fluctuate.
3. Gather same-date, same-term yields
Use a nominal Treasury and a TIPS with comparable maturity from the same date. Record the nominal yield, TIPS real yield, and the exact maturity or term. Federal Reserve yield and inflation-compensation data can provide a starting point, while Treasury auction and security details identify the specific issue. Do not compare a short nominal bond with a much longer TIPS and call the difference a breakeven.
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4. Calculate the implied breakeven
Subtract the TIPS real yield from the matched nominal yield. Label the result with the date and maturities used. Then ask whether your own inflation outlook and spending exposure could reasonably be above or below that market-implied rate. Avoid treating the calculation as a guaranteed return differential.
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5. Check duration and price sensitivity
Two bonds with the same broad maturity label can have different durations. A longer-duration issue generally experiences a larger price change for a given yield move. Review the specific security’s duration or an authoritative fund fact sheet if you are buying through a fund. Do not substitute a generic duration estimate for the actual holding when a precise risk assessment matters.
6. Decide whether you can hold through volatility
Rising real yields can create a paper loss on TIPS. Rising nominal yields can create a paper loss on nominal Treasuries. If you cannot tolerate selling at a loss, size the position and choose the maturity so that an early sale is less likely to be necessary.
7. Consider account, tax, and liquidity effects
The after-tax result can differ from the quoted yield, and the treatment of inflation adjustments depends on the account and applicable tax rules. Confirm those rules with a qualified tax professional. Also consider bid-ask spreads, trading access, and the ease of selling the exact issue you select; these factors can make two securities with similar stated yields produce different practical outcomes.
What different real-yield scenarios imply
Real yields rise while nominal yields rise by a similar amount
This pattern suggests that the market is demanding more real compensation, with less of the nominal move explained by higher inflation compensation. Existing TIPS and nominal Treasuries can both decline, but the exact losses depend on each security’s duration and the size of its respective yield move.
Real yields rise while nominal yields move only modestly
The implied breakeven may narrow because the TIPS real yield increased relative to the nominal yield. Existing TIPS can still fall in price even though nominal Treasuries did not experience an equally large yield move. This is one reason it is incorrect to assume that TIPS always gain when inflation concerns are present.
Real yields rise and breakeven inflation widens
Both real yields and nominal yields increased, but nominal yields increased more. New TIPS may offer a higher real return than before, while existing TIPS still face a price decline from the real-yield increase. A wider breakeven means the market is embedding more inflation compensation, not that future inflation is certain to be higher.
Real yields fall
The price direction reverses: existing TIPS generally benefit from falling required real yields. Nominal Treasuries benefit when their nominal yields fall. The relative result still depends on inflation compensation, duration, and whether the investor holds to maturity or sells earlier.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Buying and accessing Treasury securities
Marketable Treasury securities can be purchased at public auction through TreasuryDirect, a broker-dealer, or a financial institution. Auction access, secondary-market pricing, minimums, fees, and available issue types vary by route. Before placing an order, verify the exact security, settlement terms, maturity, price or yield convention, and any intermediary charges.
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Common mistakes and how to avoid them
- “TIPS cannot lose money.” They can lose market value before maturity. The principal floor applies to the maturity payment, not an early sale.
- “A higher real yield means TIPS prices rise.” The opposite is generally true for existing issues: higher required yields mean lower prices.
- “The breakeven is the market’s certain inflation forecast.” It is an estimate of inflation compensation that includes premiums, liquidity effects, and model or series revisions.
- “The coupon rate tells me the return.” For TIPS, the coupon rate is applied to an adjusted principal. For either security, purchase price, yield, reinvestment, and holding period matter.
- “Any two maturities can be compared.” Use matched or closely comparable maturities and duration before calculating a breakeven.
- “Real yields and nominal yields move one-for-one.” Nominal yields reflect real yields plus inflation compensation and other pricing influences, so the relationship changes over time.
- “A maturity guarantee solves every liquidity need.” If you need cash before maturity, you remain exposed to the market price on the sale date.
- “A current headline tells me which bond is best.” Without your horizon, cash-flow needs, matched yields, and tolerance for price volatility, there is no universal winner.
An illustrative calculation
Assume, purely as an illustration, that a nominal Treasury of a given maturity yields 4.50% and a closely matched TIPS yields 2.00% in real terms on the same date. The simple implied breakeven is 2.50 percentage points. That figure does not predict CPI-U. It is the inflation compensation embedded in those two quoted yields and would need to be compared with your expected average inflation, risk tolerance, taxes, liquidity needs, and holding period.
If the TIPS real yield later rises to 2.50%, its market price would generally fall, all else equal, even if CPI-U continued to increase. If you held the TIPS to maturity, the maturity payment would still be governed by the inflation-adjusted-or-original-principal rule. If you sold immediately after the real-yield increase, the sale price could reflect a loss.
When each security may fit
TIPS may fit when
- Your future spending is sensitive to broad consumer-price inflation.
- You want a quoted real yield and can accept price volatility before maturity.
- You can match the maturity to your horizon or otherwise avoid a forced sale.
- You value CPI-U-linked principal and coupon adjustments more than fixed-dollar certainty.
Nominal Treasuries may fit when
- You need predetermined dollar payments and can tolerate inflation reducing their purchasing power.
- Your expected inflation is below the matched breakeven, or you prefer the nominal cash-flow structure.
- You have a specific dollar liability and a maturity that matches it.
- You understand that nominal-yield changes, rather than real-yield changes alone, determine the bond’s price response.
A practical checklist before buying
- Write down the date you may need the money and whether an early sale is possible.
- Select a nominal Treasury and TIPS with comparable maturity and duration.
- Record the same-date nominal yield and TIPS real yield.
- Compute and label the implied breakeven inflation rate.
- Confirm how each security’s cash flows behave under changing CPI-U and market yields.
- Review the specific issue’s duration, price, index ratio, liquidity, and trading costs.
- Check the tax treatment that applies to your account and jurisdiction.
- Choose the security only after deciding whether your objective is inflation-linked purchasing power or fixed-dollar certainty.
Bottom line
Rising real yields generally hurt the market price of existing TIPS; they do not cancel the CPI-U adjustment and do not make TIPS immune to duration risk. Nominal Treasuries carry a different risk: fixed-dollar payments can lose purchasing power when inflation is higher than expected, and their prices respond to nominal-yield changes. Compare matched maturities, calculate the breakeven inflation rate, account for duration and liquidity, and align the choice with your holding horizon and cash-flow objective. The title alone cannot identify a permanent winner.
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