The Resurrection of the 60/40 Portfolio

Few investment strategies have been pronounced dead as often, and as prematurely, as the 60/40 portfolio. The classic blend — 60 per cent equities for growth, 40 per cent bonds for ballast — was written off in the zero-rate years (2010s) as a relic, then apparently buried in 2022, when the strategy lost roughly 17 per cent, its worst showing since 1937 and, by Morningstar's 150-year accounting, its most punishing stretch in a century and a half. Stocks and bonds fell together, the diversification promise at the heart of the structure failed at precisely the moment it was needed, and a cottage industry of obituarists declared the era of the balanced portfolio over.

The obituaries were premature. The 60/40 returned 17.2 per cent in 2023, roughly 15 per cent in 2024 and about the same again in 2025 - twice its long-run median - and by mid-2025 had recovered its prior peak. More importantly, the two conditions that killed it in 2022 have reversed. Bonds once again pay investors handsomely for owning them, and the stock-bond correlation, which peaked near 0.80 in mid-2024, had collapsed to roughly 0.16 by late 2025 and has since turned intermittently negative. The question worth asking in 2026 is not whether the 60/40 is alive, but whether it is once again the right default - and for whom.

The bond math has changed

The case begins with valuation. As this article is being written, the 10-year Treasury yields near 4.7 per cent, its highest level since 2007; investment-grade aggregate indices offer all-in yields not seen on a sustained basis since 2008. The real story is inflation-adjusted: 10-year TIPS yield roughly 2.3 per cent and 30-year TIPS approach 2.9 per cent — real yields at their richest since before the pandemic, and in territory last consistently inhabited before the financial crisis.

This matters for two reasons that the "bonds are back" headlines tend to conflate. First, starting yield is the best single predictor of long-run bond returns: an investor locking in 4.5–5 per cent nominal on high-grade paper has a mathematical head start that simply did not exist when the 10-year paid 0.6 per cent in 2020. Second - high yields restore bonds' capacity to hedge. A bond yielding 5 per cent has room to rally hard when recession fears strike; a bond yielding 1 per cent does not.

The correlation regime has co-operated. PIMCO, BlackRock's strategists and J.P. Morgan Private Bank have all noted the return of the inverse stock-bond relationship as inflation settles toward 3 per cent and the Federal Reserve eases. History is clear on the mechanism: when inflation runs persistently above roughly 3 per cent, stocks and bonds tend to fall together, because both are repriced by the same discount rate shock; when inflation is contained, bonds resume their role as the recession hedge. 

The dissenters, and what they are really selling

Not everyone has re-converted. Larry Fink used BlackRock's annual letter to declare the classic 60/40 "effectively dead," proposing a 50/30/20 model with a fifth of assets in private markets — infrastructure, real estate, private credit. BlackRock's own research notes that since 2020, bonds delivered negative returns in 17 of the 19 months in which equities fell more than 2 per cent — a sobering counterpoint to the correlation optimists. Apollo makes a similar case for allocations "after 60/40."

The more interesting dissent comes from Vanguard, which argues not that investors hold too many bonds, but too few. Its 2026 outlook favours an inverted 40/60 allocation, projecting a 5.7 per cent annualised 10-year return versus 5.3 per cent for the classic 60/40 — with volatility of 6.9 per cent against 9.3 per cent. The logic is valuation symmetry: US equities enter 2026 at historically stretched multiples and extreme index concentration, while bonds offer their best expected returns in nearly two decades. When the expensive asset is stocks and the cheap asset is bonds, the case for the 40 has rarely been stronger relative to the 60. Whether one accepts Vanguard's precise point estimates or not, the direction of the argument is hard to dismiss.

What this means in practice

For the retail investor, the practical conclusions are less dramatic than the headlines and more useful. The 60/40 — or a low-cost balanced fund approximating it — is once again a perfectly rational default, for the first time since the mid-2010s, because its bond half now earns a real return and can again cushion an equity drawdown. The intermediate part of the curve offers most of the yield with far less duration risk than the volatile long end, which remains hostage to fiscal-deficit anxieties. And the greater risk to the classic mix today arguably sits in its equity sleeve — concentration in a handful of US mega-caps — which argues for global diversification within the 60 more than for abandoning the 40.

For high-net-worth investors the calculus differs in degree, not kind. Long Angle's 2026 benchmark shows the wealthy have already moved: the average HNW portfolio holds roughly 28 per cent in private and alternative assets and just 5 per cent in bonds. Some of that reflects real advantages - long horizons, access to institutional-quality managers, tolerance for illiquidity. Some of it reflects the past decade's conditions, when bonds paid nothing and private markets were flattered by falling rates. With public fixed income now offering 5 per cent-ish yields, daily liquidity and near-zero fees, the hurdle a private credit fund must clear after fees to justify its lock-up has risen substantially.

Inflation remains the honest caveat. The 60/40's Achilles heel is not equities or bonds individually but a simultaneous repricing driven by inflation and fiscal stress. A modest sleeve of TIPS (at today's real yields, an attractive asset in its own right), gold or real assets addresses that specific vulnerability far more directly than a wholesale redesign.

What about GBP bonds and the British investors investing in pounds?

For a UK investor whose bond sleeve lives in sterling, the case is, if anything, stronger. Gilts yield more than their American counterparts: the 10-year trades near 5 per cent, a level that has made gilts the best-performing G7 sovereign market since last autumn and prompted BCA Research and Schroders, among others, to tip them for continued outperformance in 2026. Vanguard's UK arm projects annualised gilt returns of 5–6 per cent over the coming decade - remarkable for an asset class that spent the 2010s priced to return almost nothing. The reason gilts are cheap is no mystery: markets demand compensation for Britain's stickier inflation, heavy issuance and a fiscal position that turns every Autumn Budget into an event risk, while the structural bid from defined-benefit pension schemes - the buyer that once pinned long yields to the floor - is in run-off. But that is precisely the point about attractive pricing: the risks are known, loudly discussed and, at these yields, substantially paid for. With the Bank of England easing toward a base rate near 3.25 per cent and inflation grinding down, the short and intermediate curve offers the same asymmetry that favours US Treasuries - generous carry now, capital gains if the economy stumbles.

Two peculiarities of the UK market sharpen the argument further. First, for taxable investors, gilts enjoy a privilege no other mainstream asset can match: they are exempt from capital gains tax, which makes low-coupon issues trading below par - where most of the return arrives as untaxed price appreciation - extraordinarily efficient outside an ISA or SIPP, particularly for higher-rate taxpayers. Sterling investment-grade corporates add a spread on top for those willing to take modest credit risk. Second, holding GBP bonds against a globally diversified (and inevitably dollar-heavy) equity sleeve means the bond allocation does double duty, dampening both equity risk and currency risk in the portfolio's safe half - which is exactly where currency risk least belongs. The caveat is duration: the long end of the gilt market remains hostage to fiscal politics in a way the short end is not. A UK 60/40 built on short-to-intermediate gilts and quality sterling credit, rather than duration-heavy index trackers. This is the strategy Bondfish analysts favored in 2025, and they still hold the same view in 2026.

Verdict

Is the 60/40 relevant again? Yes - more so than at any point since 2008, for the simple reason that its bond half is finally priced to perform both of its jobs: income and insurance. But the comeback is conditional, not structural. It holds while inflation behaves; it would fail again if inflation does not.