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Is risk parity outdated post-2022?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.