Risk Parity Reconsidered: Beyond the 60/40
A measured look at risk parity twenty years after Bridgewater first popularised it: where the intuition still holds, where the criticism is fair, and how institutional investors are using it today.
The classical 60/40 portfolio is concentrated in a single risk factor: equities. Stocks carry roughly 90% of the portfolio’s variance even at a 60% capital weight. Risk parity inverts the question. Instead of allocating capital, it allocates risk — sizing each asset so that its contribution to portfolio volatility is roughly equal.
The intuition that still holds
A portfolio whose risk comes from genuinely uncorrelated drivers — growth assets, defensive assets, inflation-sensitive assets — has a higher unlevered Sharpe than one dominated by a single factor. Borrowing modestly to bring that diversified portfolio up to an equity-like volatility is a Sharpe-improving trade in the long run.
The critique that deserves attention
2022 was a painful reminder that bonds are not a free hedge. When inflation surprises move stocks and bonds in the same direction, levered risk parity suffers. The defence is not to abandon the framework but to extend it: include inflation-sensitive sleeves (commodities, breakevens, real assets), allow time-varying volatility targets, and overlay strategic tilts.
How institutions are using it today
Modern implementations look less like a single product and more like a building block. Allocators combine a risk-parity core with active risk premia overlays (carry, value, trend) and dynamic risk controls. The result is closer in spirit to the original idea — balanced exposure to fundamental drivers — than to the simplified “stocks and bonds, leveraged” caricature.
FAQ
Does risk parity require leverage?
It requires leverage to match the volatility of an equity-heavy portfolio. Unlevered risk parity is simply a low-volatility diversified portfolio — a perfectly sensible product on its own terms.
Is risk parity outdated post-2022?
No — but naive implementations are. A modern risk-parity sleeve must include inflation-sensitive assets and adaptive sizing.
August Quants Research
The August Quants research desk publishes educational essays on systematic investing, market structure, ML in finance and portfolio construction. We write for institutional readers who value rigour over noise.
