For decades, the 60/40 portfolio was the default answer to the question of how to build a balanced investment portfolio. Sixty percent equities for growth. Forty percent bonds for stability and income. The two asset classes were expected to be negatively correlated. When equities fell, bonds would rise, providing a natural cushion. The model was elegant, simple and, for a long time, it worked.

Then 2022 happened.

In 2022, both equities and bonds fell simultaneously and sharply. The correlation that underpinned the 60/40 model collapsed. Investors who had built their portfolios around the assumption that bonds would protect them when equities sold off discovered that assumption was no longer valid. The 60/40 portfolio did not just underperform. It failed at its primary structural purpose.

Why the model broke

The 60/40 model was built for a specific macro environment, one characterised by structurally declining interest rates, contained inflation and broadly synchronised global growth. That environment prevailed from roughly 1982 to 2021. It was a remarkable and unusual period, and the investment models built during it reflected its peculiarities rather than any timeless truth.

When inflation returned and central banks were forced to raise rates aggressively, the mechanics of the 60/40 model were exposed. Rising rates meant falling bond prices, eliminating the protective function of the fixed income allocation at precisely the moment it was needed most. The model did not adapt because it was not built to adapt.

What the modern investor actually needs

The replacement for the 60/40 model is not a single new allocation. It is a framework, one built around genuine diversification across asset classes that behave differently from each other, dynamic allocation that can respond to changing macro conditions and the flexibility to access both public and private markets depending on where the opportunity lies.

This means equities but not just large cap indices. It means bonds but actively managed across public and private markets, not passively held to a benchmark. It means real assets including property, infrastructure and commodities that provide genuine inflation protection and low correlation to financial assets. It means private credit with the yield premium and collateral protection that public markets cannot replicate.

And it means the ability to go short, to profit from overvaluation and dislocation, not just from markets going up.

Dynamic allocation is the key

The deepest flaw in the 60/40 model is its static nature. Sixty percent equities, forty percent bonds, held regardless of market conditions, valuations or the macro environment. This approach treats asset allocation as a set and forget exercise rather than an active, ongoing discipline.

Dynamic allocation means moving capital continuously toward the highest conviction opportunities and away from the areas of greatest risk. It requires a genuine view on the macro environment, the discipline to act on that view and the structure to execute without the constraints of a benchmark or a static mandate.

This is what Terralumin was built to do. Not to manage a fixed allocation but to move capital with precision, conviction and speed across the full opportunity set.

The bottom line

The 60/40 portfolio is not dead in the sense that it no longer exists. Billions of dollars remain invested in it. But it is a relic of a macro environment that no longer prevails and investors who remain anchored to it are accepting the limitations of a model designed for a world that has changed.

The replacement is not complicated. It is unconstrained, dynamic and built for the world as it is, not the world as it was. That is the foundation on which Terralumin was built, and it is the framework we apply every day.