You're Not Diversified Enough (W/ Adam Butler)

Why It Matters

Equal‑risk factor diversification guards portfolios against the inevitable under‑performance of any single strategy, enhancing long‑term risk‑adjusted returns for investors.

Key Takeaways

• Allocate equal risk across multiple high‑conviction strategies consistently.
• Diversify among value, momentum, quality, and term premia.
• US equities have dominated the past decade, skewing perception.
• No single factor reliably outperforms over long horizons.
• Stick to convictions and let diversified portfolio run long term.

Summary

In a recent conversation with Adam Butler, the former AQR co‑founder argues that most investors are under‑diversified, urging an “approximately equal risk allocation” across every factor or strategy they truly believe in.

Butler notes that the past ten‑plus years have been unusually kind to U.S. equities, while traditional value premiums have lagged, and momentum, quality, low‑volatility and term‑structure bets have shone. Because factor performance can swing dramatically from one year to the next, he recommends spreading risk evenly among all credible premia—value, momentum, quality, carry, trend, treasury term, etc.—rather than loading up on a single favorite.

“You really never know from year to year… you want to have an equal risk allocation to as many different premia as possible,” Butler says, emphasizing that conviction must be paired with the discipline to stay invested over the long haul. He stresses that diversification is not about chasing returns but about preserving capital when any one strategy underperforms.

For portfolio managers and individual investors, the prescription means expanding factor exposure, rebalancing to maintain equal risk weights, and resisting the temptation to concentrate on recent winners. Implementing such a framework can smooth return volatility, reduce drawdowns, and improve the odds of achieving consistent, risk‑adjusted performance over decades.