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Inflation-Linked Bonds

When They Do Not

Pomegra Learn

When They Do Not

Inflation-linked bonds are not a perpetual insurance policy. In several common scenarios, they underperform nominal bonds sharply, and holding too much TIPS exposure can drag on long-term returns.

Key takeaways​

  • Rising real yields is the most damaging scenario for TIPS; if real yields climb while inflation is stable or rising, TIPS can lose 10–15% of value
  • Deflation that includes falling inflation expectations (not just falling prices) can hurt TIPS as much as nominal bonds because real yields widen
  • If inflation comes in below the breakeven rate priced at purchase, nominal bonds outperform
  • Overweighting TIPS in a low-inflation environment locks in real yields that look poor in hindsight
  • Holding TIPS in taxable accounts, where phantom income is taxed annually, reduces after-tax returns significantly

Rising real yields: the TIPS bear case​

The most costly scenario for TIPS is when real yields rise. This happened sharply in 2022. Example:

  • Early 2022: 10-year TIPS yielded -0.5% real, with a duration near 6.5 years
  • Mid-2022: 10-year TIPS yielded +1.2% real, duration still 6.5 years
  • Price impact: a 1.7% rise in real yields × 6.5 duration = roughly -11% price decline

A $100,000 position in 10-year TIPS fell to roughly $89,000 in value despite inflation running 8%+. The reason: real yields rose faster than the real principal adjustment accumulated. The investor endured -11% price loss in the fund's NAV while waiting for the inflation adjustment to eventually catch up.

This can happen for several reasons:

Fed tightening. When the Fed raises rates aggressively (as in 2022), real yields rise because the Fed is signaling it will crush inflation and maintain high real policy rates for years. Long-term real yields rise in anticipation.

Growth re-acceleration. If growth suddenly improves (e.g., a supply-chain resolution or policy shift), long-term real yields can rise because investors expect more attractive investment opportunities in the real economy. Bonds compete with stocks, and higher expected stock returns push bond yields up.

Inflation expectations de-anchoring downward. Paradoxically, if inflation expectations collapse (breakeven falls sharply), real yields can rise even if nominal yields fall. Example: late 2023. Nominal yields fell from 5.0% to 4.0%, and breakeven fell from 2.3% to 2.0%, so real yields rose from 2.7% to 2.0%.

In all these cases, TIPS suffer because real yields are the direct cost of capital for a Treasury TIPS holder. Rising real yields means your TIPS position is worth less today, even if you earn the promised real yield over time.

The risk of nominal bonds when inflation re-accelerates​

A natural follow-up question: if TIPS can be hurt by rising real yields, can nominal bonds be hurt by re-accelerating inflation?

Yes. If inflation expectations rise sharply (breakeven goes from 2.0% to 3.0%) while real yields stay flat or rise, nominal bond prices fall. This happened in 2021: nominal Treasury yields rose from 1.5% to 1.9%, driven primarily by rising inflation expectations, and nominal bonds fell in price.

However, nominal bonds recover faster than TIPS in a re-acceleration because the coupon and principal are fixed. If you hold a 4.0% coupon Treasury through a rise in yields to 5.0%, you still receive 4.0% coupons, which become more valuable in a higher-yielding environment. Your total return becomes: negative price change + still-rich coupons.

Conversely, TIPS coupons are fixed in real terms, and if inflation expectations are rising, the real yield (your coupon) is worth less relative to market real yields.

Below-expectation inflation: the deflation risk for TIPS​

If you buy 10-year TIPS expecting 2.5% average inflation and actual inflation averages 1.5%, TIPS fail to deliver expected returns. Your real yield locks in, but you foregoed the higher nominal yields available in nominal Treasuries.

Example: Early 2015, after the Fed raised rates to 0.25% and began holding them steady, breakeven inflation was around 1.5%. An investor bought 10-year TIPS at roughly 0.3% real yield, expecting 1.5% inflation. From 2015 to 2020, inflation averaged 1.3%, and by 2020, inflation expectations had fallen further. TIPS returns were poor because:

  1. Real yields fell (positive), but the low 0.3% real coupon locked in low returns
  2. Inflation came in below 1.5%, so there was no surprise upside in principal adjustments
  3. A nominal Treasury at 1.8% yield would have provided better returns

This is a particularly painful scenario: you chose TIPS to protect against inflation, inflation was low, and TIPS underperformed. The only consolation is that real purchasing power was maintained.

Deflation with collapsing inflation expectations​

A worse version of below-expectation inflation is deflation coupled with collapsing inflation expectations. Example: 2008–2009.

  • Early 2008: Breakeven inflation was 1.8%, TIPS real yields near 0.5%
  • Late 2008: Breakeven inflation fell to 1.0%, TIPS real yields spiked to 2.0%

Even though TIPS principal was being adjusted for deflation (a 1% annual deflation adjustment reduced principal), the rise in real yields (2.0% − 0.5% = 1.5% rise) meant TIPS prices fell sharply in the interim. An investor holding TIPS saw prices down 12–15% while the Treasury market was experiencing a similar deflation dynamic.

However, at maturity, the investor with TIPS was protected: deflation did not reduce the principal below par, whereas a nominal bond's real return was locked in at the 2.0% yield (real return = 2.0% nominal − (−2.0%) deflation = 4.0% real, a one-time benefit).

This scenario is rare but illustrates that TIPS are not "always right" in bad times. They protect terminal value, but interim prices can suffer.

CPI mis-measurement​

A subtle but real risk: official CPI may not match your personal inflation. If the government's CPI index rises 3% annually but your personal basket (healthcare, education, housing in expensive cities) rises 4%, TIPS will not keep you whole. You earn 3% real returns on paper but lose 1% in personal purchasing power.

This happened to many retirees in the 2010s. CPI stayed below 2.5%, so TIPS were cheap and underperformed. But healthcare inflation (relevant for retirees) ran 3–4%, meaning TIPS failed to protect real healthcare purchasing power.

CPI basket weights shift over time. As of 2024, housing is roughly 32% of the CPI basket, while healthcare is only 9%. If you are 70 years old, healthcare is a much larger part of your real inflation; official TIPS adjustments will undercompensate you.

Overweighting TIPS in low-real-yield environments​

When real yields are very low or negative (as in 2021–2022), TIPS offer poor prospective returns. Buying a -0.5% real TIPS means locking in a -0.5% real loss per year, plus the hope that inflation will be higher than expected.

Many investors overweighted TIPS in 2021, motivated by the argument that "inflation is coming." It was right directionally (inflation did surge), but:

  1. Real yields eventually rose to +2.0%, reducing TIPS prices sharply
  2. The -0.5% real coupon locked in the loss
  3. A 60/40 portfolio that was 50% TIPS underweighted stocks during a strong equity recovery (2023–2024)

The TIPS positioning was correct on inflation, but incorrect on real yields, which proved more impactful for total returns.

Taxable account drag​

Holding TIPS in taxable accounts is especially damaging in low-inflation years. The tax on phantom income is unavoidable:

  • TIPS principal adjusts by inflation annually, and that adjustment is taxable income
  • If inflation is 2% and you hold $100,000 in TIPS, you owe tax on $2,000 in ordinary income (at marginal rates: 22–37%), even though you received no cash
  • After-tax real return = nominal real yield − tax on phantom income

Example: TIPS yielding 2.0% real, 3.0% inflation, held in a taxable account at 24% marginal rate:

  • Nominal return: 2.0% real + 3.0% inflation = 5.0% nominal
  • Taxable phantom income: 3.0% inflation adjustment
  • Taxes owed: 3.0% × 24% = 0.72% of principal
  • After-tax return: 5.0% − 0.72% = 4.28%, or 1.28% real after-tax

If inflation were 2% instead:

  • Nominal return: 2.0% real + 2.0% inflation = 4.0% nominal
  • Phantom income taxes: 2.0% × 24% = 0.48%
  • After-tax return: 4.0% − 0.48% = 3.52%, or 1.52% real after-tax

TIPS become even less attractive in taxable accounts when inflation is low (the phantom income tax stays constant, but real returns are smaller).

Long TIPS in a rising-rate environment​

Long-duration TIPS (10–30 year) are particularly vulnerable to rising real-yield environments. If real yields rise 1%, a 30-year TIPS (duration ~12 years) loses roughly 12% of value. This is the same duration risk as long nominal bonds but with the additional burden of a potentially lower real coupon.

An investor who overweighted long TIPS in 2021–2022 experienced brutal losses:

  • 10–30 year TIPS down 12–15% in 2022
  • Still earning a -0.5% to +0.3% real yield
  • No price recovery until real yields fall again

For long-dated TIPS, the real-yield path dominates returns. If real yields will be rising (due to Fed tightening or strong growth), long TIPS are a poor choice, regardless of inflation expectations.

Portfolio drag from TIPS​

If you hold 40% TIPS in a portfolio and TIPS lag nominal bonds for 5–10 years, you give up significant compounded return. Example:

  • Scenario: 60% nominal bonds, 40% TIPS, 40% equities (a "three-asset" portfolio)
  • Year 1–5: TIPS underperform nominal bonds by 1% annually (due to below-trend inflation and rising real yields)
  • Cumulative drag: roughly 5% of the TIPS allocation = 2% of overall portfolio

That 2% annual drag compounds to a 10–12% cumulative return loss over five years. Conversely, if TIPS outperform by 1% annually (due to surprise inflation), the TIPS allocation becomes a source of outperformance.

When to trim or exit TIPS​

Tactical reasons to reduce TIPS exposure:

  1. Real yields have turned positive and attractive. If 10-year real yields rise above 2.5%, nominal bonds become more attractive on a real-return basis, and TIPS are less valuable as a hedge.

  2. Breakeven inflation is very high (above 2.7%). If inflation expectations are already elevated, additional inflation surprises are unlikely, and TIPS offer less asymmetric protection.

  3. Fed is in a tightening cycle. Real yields are likely to rise, pressuring TIPS prices. Reduce long TIPS, keep short TIPS.

  4. Personal inflation is tracking well below official CPI. If your actual cost of living (healthcare, energy, housing) is stable or falling, TIPS are protecting against inflation that is not harming you.

  5. Taxable account drag is high. If you hold TIPS in taxable accounts and inflation is running 2–3%, the phantom income tax drag is significant; move TIPS to retirement accounts or sell.

Decision tree: Should you own TIPS right now?​

Next​

Inflation-linked bonds are a tool, not a destination. The final step before building real portfolios is to understand how TIPS differ from commodities as inflation hedges, and when to use each.