TIPS Index Funds: Inflation Protection
TIPS are the only Treasury whose principal rises with inflation. The protection is real, but the mechanics — real yields, the deflation floor, and a phantom tax — surprise most first-time buyers.
Don't have time? Here's what you need to know:
- 1TIPS adjust their principal with the CPI, so both the bond's value and its interest payments rise with inflation.
- 2VTIP holds short-term TIPS with low duration; SCHP and TIP hold all maturities with more inflation protection but bigger price swings.
- 3TIPS create taxable "phantom income" each year, so they are best held inside an IRA or 401(k).
- 4They protect purchasing power for retirees and near-term spenders, but matter less for a young, stock-heavy investor.
How Inflation-Protected Treasuries Work
Treasury Inflation-Protected Securities, or TIPS, are U.S. government bonds with a built-in inflation adjustment. The key mechanism is that the bond's principal rises in step with the Consumer Price Index. When inflation runs at 4%, the principal grows by roughly 4%, and the fixed coupon rate is then paid on that larger principal — so both the value of the bond and the interest it throws off keep pace with rising prices.
This makes TIPS fundamentally different from a regular Treasury or a total bond fund, which pay a fixed dollar amount that inflation quietly erodes. TIPS are designed to protect your purchasing power rather than a nominal dollar figure. The three index funds investors reach for are VTIP (short-term TIPS), SCHP (broad TIPS), and TIPS, each bundling many individual securities so you don't have to buy them one at a time at auction.
Real Yields and Why Maturity Matters
TIPS are quoted in terms of a "real yield" — the return you earn above inflation. A real yield of 2% means you are promised inflation plus 2%, whatever inflation turns out to be. That is a cleaner way to think about a bond's value than a nominal yield, because it strips out the inflation guessing game.
But TIPS still carry interest-rate risk, and the longer the maturity, the more the price swings when real yields move. This is the central reason the funds differ. VTIP holds short-maturity TIPS with low duration, so its price is relatively stable and it tracks recent inflation closely — useful as a near-term inflation hedge. SCHP holds the full maturity spectrum with a longer duration, giving more inflation protection over time but also bigger price swings when real rates change, as happened in 2022.
| Fund | Maturity focus | Duration | Best used as |
|---|---|---|---|
| VTIP | Short-term TIPS | Low (~2-3 yrs) | Near-term inflation hedge, low price volatility |
| SCHP | Broad / all maturities | Intermediate (~6-7 yrs) | Long-run inflation protection |
| TIP | Broad / all maturities | Intermediate (~6-7 yrs) | Long-run inflation protection (iShares) |
Two Quirks: The Deflation Floor and the Phantom Tax
TIPS come with two features that catch people off guard. The first is a deflation floor on individual bonds: if you hold a TIPS to maturity, you are guaranteed to get back at least your original principal even if cumulative deflation would otherwise have reduced it. That floor protects individual buyers — though in a fund, where bonds are constantly traded rather than held to maturity, the price can still fall during deflationary stretches.
The second is the so-called "phantom income" tax. The annual increase in a TIPS' principal is taxable in the year it happens, even though you don't receive that money in cash until the bond matures or you sell. In a taxable account, that means owing tax on income you haven't pocketed yet. The standard fix is to hold TIPS funds inside a tax-advantaged account such as an IRA, where the phantom-income problem simply disappears.
Important: In a taxable account, TIPS create "phantom income" — you owe tax on principal growth you haven't received as cash. Hold them in an IRA or 401(k) to avoid this.
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When TIPS Belong in Your Portfolio
TIPS shine in a specific role: protecting the purchasing power of money you'll need to spend, particularly for retirees and anyone with near-term spending goals who can't afford to have inflation eat their fixed-income holdings. A retiree drawing down a portfolio over decades faces real inflation risk on a regular Treasury or total bond fund, and a TIPS allocation directly addresses it.
They are less compelling for a young investor with a long horizon and a stock-heavy portfolio, since equities have historically outpaced inflation over long periods on their own. TIPS are also not a free lunch — when real yields are low or negative, you are essentially paying for the inflation insurance. Many investors hold TIPS as a portion of their bond allocation rather than the whole of it, pairing something like SCHP with a nominal total bond fund.
Frequently Asked Questions
How do TIPS protect against inflation?
A TIPS bond's principal rises with the Consumer Price Index, and its fixed coupon is paid on that adjusted principal. So when inflation runs at 4%, the principal grows by roughly 4% and the interest payments grow with it. Unlike a regular Treasury, which pays a fixed dollar amount that inflation erodes, TIPS are designed to preserve purchasing power.
What is the difference between VTIP and SCHP?
VTIP holds short-maturity TIPS with low duration, so its price is relatively stable and it tracks recent inflation closely — useful as a near-term hedge. SCHP holds the full range of maturities with a longer duration, giving more inflation protection over time but larger price swings when real interest rates move, as both funds experienced in 2022.
Why should I hold TIPS in a retirement account?
Because of "phantom income." The annual increase in a TIPS' inflation-adjusted principal is taxable in the year it occurs, even though you don't receive that money as cash until you sell or the bond matures. In a taxable account that means owing tax on income you haven't pocketed. Holding TIPS in an IRA or 401(k) shelters that growth and avoids the problem.
Can a TIPS fund lose money?
Yes. TIPS carry interest-rate risk: when real yields rise, the market price of existing TIPS falls, and a fund's price falls with them. Broad TIPS funds like SCHP and TIP have intermediate duration and declined in 2022 when real rates jumped. The inflation adjustment protects purchasing power over time, but it does not make the funds immune to short-term price losses.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.