TIPS vs Nominal Bonds in Portfolio
TIPS vs Nominal Bonds in Portfolio
Nominal bonds assume the Fed will control inflation; TIPS protect you if the Fed fails. Neither is universally superior—which you choose depends on your inflation expectations and your tolerance for real rate volatility.
Key takeaways
- TIPS provide a real return (after inflation) and win when inflation accelerates unexpectedly above consensus expectations
- Nominal bonds provide a higher nominal yield in low-inflation regimes and outperform TIPS when inflation falls below expected levels
- 2022 showed that TIPS offer better diversification during inflation spikes; 2023 showed that nominal bonds outperform when inflation moderates
- Most portfolios benefit from a 60/40 or 70/30 split between nominal bonds and TIPS rather than choosing one
- The breakeven inflation rate (where TIPS and nominal bonds have equal expected return) is the key metric to monitor
What TIPS and nominal bonds are
A nominal Treasury bond is what you know: the U.S. government promises to pay you a fixed coupon (say, 4% annually) and repay principal in full at maturity. If inflation rises after you buy the bond, your real return (4% minus inflation) falls. If inflation falls below 4%, your real return rises. The bond does not protect you from inflation—it is a fixed bet on nominal dollars.
A TIPS (Treasury Inflation-Protected Security) is different. The coupon is fixed in real terms, and the principal adjusts upward or downward with the Consumer Price Index. If you buy a TIPS yielding 1.5% and inflation runs 4%, your real return is locked in at 1.5%, but the nominal value of your investment rises. At maturity, you receive the inflation-adjusted principal.
Example: You buy $100k of TIPS yielding 1.5%, maturing in 10 years. The coupon is 1.5% per year, paid on the inflation-adjusted principal. If inflation averages 4% annually, the principal grows to approximately $148k by maturity. You receive $148k times 1.5% coupon on the final adjusted value, plus the adjusted principal, netting a real return of 1.5% plus the inflation hedge.
In contrast, with a $100k nominal 10-year Treasury yielding 4%, you receive $4k annual coupon (fixed in nominal dollars) and $100k principal back. If inflation averages 4%, your real return is roughly 0% (you've preserved nominal purchasing power, not real purchasing power).
2022: the TIPS moment
In 2022, the inflation shock created a moment when TIPS shined and nominal bonds faltered. The S&P 500 fell 18% and nominal bonds fell 13%, but TIPS fell only 3–4%. The difference was immense for a portfolio hedge.
Why? Because TIPS' principal adjusts with actual inflation. When inflation hit 9.1%, the principal value of a TIPS bond automatically rose roughly 9% to reflect the higher inflation already reported. Meanwhile, nominal bonds, which had fixed principal, fell sharply as yields spiked to compensate for the now-higher expected inflation.
A 60/40 portfolio split 30/13/27 between stocks, TIPS, and nominal bonds would have fallen roughly 12% in 2022, versus 13.8% for a traditional 60/30 bond allocation. The TIPS cushioned the portfolio.
However, TIPS did not provide the full 5–7% hedge that a true flight-to-safety asset (like long-duration Treasuries in 2008) would have. TIPS still fell in price because the real yield (yield above inflation) rose. Even though principal adjusted upward, the market repriced TIPS at higher real yields, creating mark-to-market losses.
2023: nominal bonds' revenge
By mid-2023, inflation was falling. June CPI came in at 3%, then 3.4%, then the trend flattened around 3–4%. Meanwhile, Fed Funds were at 5.25% and the market began pricing in rate cuts. Long-term inflation expectations fell below 2.5%.
In this regime, nominal bonds outperformed TIPS dramatically. A 10-year nominal Treasury that yielded 4.2% in September 2023 had fallen in price (bonds up, yields down) by November as rates compressed to 3.8%, creating capital gains. TIPS, which had principal locked in to much lower realized inflation, underperformed because there was no new inflation to add to the principal.
The realized outcome: a nominal 10-year Treasury returned roughly 8% total return in late 2023, while a TIPS with the same maturity returned roughly 6%. The extra 2% came from the bond market repricing lower real yields (due to Fed pivot expectations and economic slowdown fears).
This is the key trade-off: TIPS win when inflation surprises to the upside (2022). Nominal bonds win when inflation surprises to the downside (2023) or when the Fed is expected to cut rates sharply.
The breakeven inflation rate
The critical metric is the breakeven inflation rate (BEI)—the difference in yield between a nominal bond and a TIPS of the same maturity. If a 10-year nominal Treasury yields 4.5% and a 10-year TIPS yields 1.8%, the breakeven inflation rate is 2.7%. This is what the bond market is implicitly forecasting for average inflation over the next 10 years.
When BEI is 2.7%, the market is saying: "We expect 2.7% inflation on average. If inflation comes in above 2.7%, buy TIPS. If below, buy nominal bonds."
In mid-2022, BEI spiked to 3.1%—still low given that inflation was running 8%+, signaling that markets expected inflation to fall sharply (which it did). In late 2022, BEI had fallen to 2.3%, suggesting the market expected inflation below current levels (a reasonable bet given Fed tightening). By mid-2023, BEI was 2.5%, close to the Fed's long-term target.
The practical approach: monitor BEI. If BEI is below 2% (market expecting sub-2% inflation), nominal bonds are the better bet. If BEI is above 2.5% and trending higher, TIPS offer better downside protection.
Portfolio architecture: the 60/40 split
Rather than choosing TIPS or nominal bonds, most investors benefit from holding both. A common allocation:
- Equities: 50–70%
- Nominal bonds: 20–25% (BND, AGG, or Treasury ladder)
- TIPS: 5–10% (TIP, or Treasury TIPS ladder)
This provides:
- Upside from bonds in growth-oriented environments (2023, when nominal bonds rally as rates fall)
- Downside protection in inflation spikes (2022, when TIPS outperform)
- Diversification across inflation regimes
During rebalancing, you can shift the nominal/TIPS ratio based on inflation expectations. If you expect inflation above 3%, increase TIPS. If you expect inflation below 2%, increase nominal bonds.
Real returns: TIPS as your 3% anchor
One powerful way to think about TIPS is as a 3% real return anchor. A TIPS yielding 1.5% real (which was common in 2023–2024) locks in 1.5% real return. Combined with nominal bonds yielding 4%, you have a blended real return of 2.5–2.75% depending on your allocation. This is below historical equity real returns (roughly 5–7%) but substantially above cash (0–1% real).
For retirees and near-retirees, TIPS can be the core safety allocation. By holding enough TIPS to cover 2–3 years of living expenses, you lock in a real return that will not be eroded by inflation surprises. Nominal bonds provide the higher return but with inflation risk.
A 50-year-old with 20 years to retirement might allocate:
- 60% equities (VTI, VXUS)
- 20% nominal bonds (BND, AGG)
- 10% TIPS (TIP, or Treasury TIPS ladder)
- 10% cash (money market)
The TIPS cushion ensures that a 2022-like inflation shock will not destroy the portfolio, while nominal bonds provide the higher return needed to grow wealth over 20 years.
Tax implications: nominal vs TIPS in taxable accounts
In tax-deferred accounts (401k, IRA), hold whichever bonds fit your inflation expectations—tax drag is irrelevant. In taxable accounts, TIPS have a tax disadvantage: the annual inflation adjustment to principal is taxed as income even though you don't receive it in cash.
Example: You hold $100k TIPS at 1.5% real yield. If inflation is 4%, the principal adjusts to $104k, and you owe tax on the $4k adjustment plus the coupon, even though you haven't received the $4k. This is why TIPS are more tax-efficient in tax-deferred accounts.
For taxable accounts, consider:
- Core bonds (nominal, in BND or AGG) in taxable accounts
- TIPS in tax-deferred accounts (401k, IRA, Roth IRA)
- Short-term bonds in taxable to minimize interest rate risk and tax drag
The decision tree: TIPS or nominal?
Next
Now you understand the choice between inflation-hedged and nominal bonds. But within the nominal bond world, you face another decision: should your bonds come from the U.S. government (Treasuries) or from corporations and other issuers (credit bonds)? The next article explores the risk-on versus risk-off trade-off in bond selection.