Inflation Protection: Opportunity and Risk Management for Family Wealth

1. Inflation protection no longer costs you yield.
   The US 10-year inflation-protected Treasury (TIPS) closed at a real yield of 2.95% on 5 October, the highest since November 2008. Australian inflation-linked bonds offer around 2.6% above CPI. For the first time in a generation, investors are well paid to protect their wealth against inflation.

2. An inflation-linked bond is a real-rate position first and inflation insurance second.
   Held to maturity, it locks in a real return. Valued in the meantime, its price moves with real yields. That is why the US TIPS index returned -0.59% a year over five years that included the highest inflation in four decades. For a family funding spending over decades, that interim price movement matters far less than the real spending power the bond secures.

3. What the allocation replaces matters more than how much is held.
   In a balanced portfolio, replacing fixed-rate bonds with inflation-linked bonds improves resilience to stagflation with little change in overall risk. Replacing floating-rate holdings adds duration, which mainly suits families funding long-horizon spending.

4. Hold it through the cycle, add to it when it is cheap.
   The decision to hold inflation protection rests on the risk it manages, whatever inflation is doing in the headlines. Real yields tell you how much to hold and when to add.

Inflation protection does two jobs in a family portfolio.

• As risk management, it removes the risk that unexpected inflation erodes spending power, a risk that cash and conventional bonds carry in full.

• As an opportunity, it earns a return in its own right when real yields are high.

The most direct tool for both is an inflation-linked bond, which pays a fixed real yield plus realised inflation, so its value keeps pace with the cost of living. For most of the past fifteen years, only the first job was on offer, and investors paid for it through negative real yields. That is no longer true. Australian monthly CPI rose to 4.0% in the year to August, and the RBA lifted the cash rate to 4.60% on 29 September, its fourth increase this year. Real yields in Australia and the US are now at or near two-decade highs.

At these levels, the opportunity is clear. The harder questions, and the ones that outlast any yield cycle, are what does inflation protection actually protect against, what risk does it add and where does it belong in a portfolio?

Inflation protection removes one set of risks and introduces another. It removes the risk that inflation runs above expectations and erodes real spending power. It also removes the reinvestment risk of cash, whose real return depends on where future rates sit. In exchange, it adds real-rate risk, because its price moves with real yields before maturity, and liquidity risk, because its markets are thinner than those for conventional government bonds.

Whether that trade-off is worth making depends on how you measure risk. One view, the cautious one, judges an inflation-linked bond by its price, and on that measure the bonds are less safe than they look. They beat conventional bonds only if inflation exceeds what markets already expect. Their thinner markets can trade more like corporate credit in a sell-off. Investors planning to hold to maturity often need the money sooner than expected. UK index-linked bonds, which have lost money in 2026 despite an inflation shock, are the cautionary example.

The other view takes a longer horizon and judges wealth by the spending it can sustain over a lifetime. The question is not what the bond is worth today but how reliably it can fund spending in real terms for years to come. Measured that way, long-dated US inflation-linked bonds have been the least risky government asset of the past three decades. Year-to-year swings in the real spending they could sustain were around 3%, against nearly 7% for conventional long bonds and 14% for cash. Cash, which looks the safest of the three, leaves a family reinvesting at unknown real rates in the future.

For a family, the longer horizon is the right one. The cautious objections are real, but they are about price. For a bond held to maturity, the price on any given day changes what the portfolio looks like on a statement, not what it will ultimately deliver. A family funding its lifestyle over decades can afford to look through short-term price moves in this holding, provided it is never a forced seller. Liquidity for near-term spending and a buffer to absorb drawdowns must come from other parts of the portfolio. That ordering, risk management first and opportunity second, runs through everything that follows.

Yes, even on the cautious view’s own test, particularly when compared with the UK. That test is breakeven inflation, the gap between nominal and real bond yields, which tells you the inflation rate an inflation-linked bond must beat to outperform a conventional one. In the UK, the 3.6% breakeven is above CPI of 3.1%, so inflation-linked bonds are expensive there. In Australia, the breakeven is about 2.6% against CPI of 4.0%, and in the US it is 2.35% against roughly 3.7%. On those numbers, Australian inflation-linked bonds outperform unless inflation falls back and averages below about 2.6% over the bond's life. That is a little above the midpoint of the RBA’s 2–3% target band.

Valuation changes with the cycle, but the case for holding some inflation protection does not. Value should set the size of the holding; it should not decide whether there is one. Nor is valuation the only test. Australia’s inflation-linked market is much smaller than the US market, so holders should never be forced sellers, and a portfolio’s liquidity reserve should sit elsewhere. Inflation-protected bond ETFs also hold a constant maturity and never mature, so they do not deliver the locked-in, held-to-maturity outcome in the way a single bond does. For a family holding them through the cycle, that distinction matters less than it appears: a rolling portfolio of real bonds still delivers the real yield over time, provided the holding is never sold under duress.

Consider a balanced portfolio with 50% in equities and other market-risk assets and 50% in fixed income, mostly high-quality floating-rate securities. Equities dominate the risk in a portfolio like this. In our stress testing, an illustrative 10% allocation to inflation-linked bonds changed total returns by no more than about 1.3 percentage points in any scenario. The real decision, therefore, is what the fixed-income half should protect against, and that depends on where the money comes from.

• Funded from fixed-rate bonds. Portfolio duration stays broadly unchanged, and the portfolio swaps exposure to expected inflation for exposure to realised inflation. In our scenarios, this lifted the stagflation outcome by 1.3 points. It cost about 1.2 points in a deflationary liquidity shock such as 2008 or March 2020, when conventional bonds rally and inflation-linked bonds do not. For most balanced portfolios, this is the natural first step.

• Funded from floating-rate holdings. This adds six to seven years of real duration and hurts most in a 2022-style tightening. For families with long-horizon real commitments, such as pension-phase investors and foundations, it reduces the risk that matters most to them. Inflation-protected bond ETFs are a practical vehicle for this. They give diversified exposure across the curve in a market where individual lines are thin, and they can be built in stages and resized without trading illiquid bonds. The cost is that an ETF never matures and is repriced every day, which is where the earlier point bites hardest. It must be judged by the spending it secures, not by its price, and it must never be the part of the portfolio a family sells when it needs cash.

A core-and-satellite approach suits most Australian families. The core should match the inflation that drives the family’s spending, which for Australian families means Australian CPI; an inflation-protected bond ETF holding Treasury Indexed Bonds is the practical way to hold it. Currency-hedged US TIPS earn a place alongside the core. They give access to the deepest inflation-linked market in the world and to a US inflation basket with a heavier energy weighting, which matters while oil is driving prices.

US TIPS come with caveats. They pay US inflation, not Australian inflation. The pick-up from hedging the currency, currently about 0.5% a year, lasts only while Australian cash rates sit above US cash rates. In a liquidity crisis, hedged TIPS have historically lagged conventional government bonds by a wide margin. That crisis case is the reason to keep them a satellite holding and to size them accordingly.

Inflation protection earns its place in a family portfolio twice over: as the one asset that directly protects spending power from inflation, a case that holds in quiet years as much as in noisy ones, and as a return in its own right when real yields are high, as they are now.

After fifteen years of protecting against inflation by accepting a negative real return, families can buy that protection with a real yield attached. The approach should be deliberately measured. Anchor on the inflation that drives the family’s spending, fund the allocation from the part of the portfolio whose risk it is meant to replace and build positions in stages rather than all at once.

Above all, decide in advance what each part of the portfolio is there to protect and keep enough liquidity elsewhere that the inflation-protected holding is never sold on a bad day.