Preserving Purchasing Power: Nominal Bonds, Linkers and the Breakeven
Eoin holds €300,000: €120,000 in cash at 1.90% and €180,000 in a euro aggregate nominal bond fund yielding 3.10% with duration 6.0. He plans to buy a property abroad in five years and wants to preserve purchasing power in the meantime, but says he is "not willing to accept a capital loss". Eurozone inflation is currently 4.2%. Consensus is 2.6% a year over his horizon, but published forecasts range from 1.5% to 4.5%. A euro inflation-linked bond maturing in five years offers a real yield of 0.40% and has a real duration of 4.8. His adviser proposes moving the entire €180,000 bond allocation into the linker. Eoin asks what a 'real yield' actually is and whether the inflation number in the newspaper is the one that applies to him.
1. Calculate the real return on each of the three holdings under consensus inflation, and the breakeven inflation rate between the nominal fund and the linker.
Read the worked answer
Real return = (1 + nominal) / (1 + inflation) − 1. Using consensus 2.6%:
| Holding | Nominal | Real return |
|---|---|---|
| Cash | 1.90% | 1.019/1.026 − 1 = −0.68% |
| Nominal bond fund | 3.10% | 1.031/1.026 − 1 = +0.49% |
| Inflation-linked bond | 0.40% real | +0.40% (by construction) |
Using current inflation of 4.2% instead:
- Cash: 1.019/1.042 − 1 = −2.21%
- Nominal fund: 1.031/1.042 − 1 = −1.06%
- Linker: still +0.40%
Breakeven inflation: (1.031 / 1.004) − 1 = 2.69%.
Interpretation:
- If inflation averages exactly 2.69%, the nominal fund and the linker deliver the same real outcome.
- If inflation averages the 2.6% consensus, the nominal fund wins - but by only 9 basis points a year, roughly €1,600 over five years on €180,000. That is inside anyone's forecast error.
- If inflation averages 4.5%, the nominal fund returns 1.031/1.045 − 1 = −1.34% real, while the linker returns +0.40% - a 1.74% annual gap, about €16,000 over five years.
Asymmetry: the upside from holding nominal in a disinflationary scenario is capped at ~9bp (or ~50bp at 1.5% inflation, still small), while the downside in an inflationary scenario is 1.7–2.0% a year. The linker is the cheaper insurance - which is not the same as being the better return.
2. What risks does Eoin take on by switching entirely to the linker, given his stated aversion to capital loss and his five-year property plan?
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1. Real-duration risk - the one that directly contradicts his stated constraint. Real duration 4.8 means a 1% rise in real yields produces roughly a −4.8% capital loss, and a 2% rise roughly −9.6%. If he holds to the five-year maturity he gets par back; if he sells early, he does not. So the linker satisfies "no capital loss" only if he genuinely holds to maturity - the same discipline problem he has with the nominal fund, but with an extra leg of risk (real yields) that he has never thought about.
2. Indexation lag. HICP-linked bonds typically reference an index published two to three months before the payment date. In a fast-rising inflation regime, the linker under-compensates by the lag - a few tenths of a percent, not nothing.
3. His inflation ≠ HICP. His liability is a property abroad. That price is driven by foreign house prices and by the EUR/foreign currency rate, neither of which the linker tracks. He may be hedging the wrong thing entirely. If the property is outside the euro area, the dominant risk in five years is currency, not eurozone CPI.
4. Liquidity and pricing. Individual linkers, particularly shorter-dated issues, can trade wide. The quoted 0.40% real yield assumes he can transact at mid - a retail-sized ticket may not.
5. Deflation is not a large worry but is worth stating: at maturity most euro linkers repay at least par, so a deflationary period leaves him with his nominal capital intact plus any accrued indexation - the floor is real.
6. Negative real yields on purchase above par: if he buys at a premium, the quoted real yield is the return only if held to maturity; interim accounting is messier than he expects.
3. What would you recommend for a five-year, inflation-uncertain but capital-cautious objective, and how would you deal with his 'no capital loss' instruction?
Read the worked answer
Reframe the instruction first. "No capital loss" is not an investable instruction - the cash sleeve is already losing 0.68% a year in real terms at consensus inflation, and 2.21% a year at current inflation. The honest restatement is: "I will accept no nominal loss on the money I need, and I want the best possible protection of purchasing power on the rest." Get that on the file.
Recommended structure for €300,000 over five years:
- €120,000 cash: keep, but split across institutions to stay within the €100,000 deposit guarantee limit per depositor per institution. This is his certain money; the negative real return is the insurance premium.
- €100,000–€120,000 in a short-dated linker or a laddered linker portfolio held to maturity. Duration 4.8 is acceptable because it is held to a matched five-year date - the real-duration risk is neutralised by the hold-to-maturity discipline, which must be documented as a commitment, not an intention.
- €60,000–€80,000 in the nominal bond fund or short-dated nominal bonds, as a hedge against the disinflationary scenario and a source of liquidity that does not require selling the linkers early.
- Address the currency question explicitly if the property is outside the euro area. A five-year forward or a staged currency purchase may do more for his actual objective than the entire nominal-versus-linker debate.
Why not go 100% into the linker as proposed:
- It converts a diversified inflation bet into a single, large real-duration position with no liquidity buffer.
- It removes the disinflation hedge for a 9bp-a-year expected cost - a poor price for a one-sided bet.
- It solves a problem (eurozone CPI) that is probably not the actual risk to his property purchase.
The test to apply: ask him which of these he would rather explain to his family - holding a nominal fund that returned 0.5% real when inflation stayed at 2.6%, or holding a 100% linker position that fell 9% in price two years before he needed the money and forced him to sell. The answer tells you whether the adviser's proposal is a hedge or a bet.