When Glide Paths Fail: Rethinking Downside Protection in Target Date Funds
Target date funds have become the default architecture of the defined contribution system. Over 60% of 401(k) assets now flow into target date strategies, and in many plans, they serve as the QDIA—effectively determining the investment experience for a majority of participants.
At the center of that architecture is the glide path: a steady reduction in equity exposure, offset by increasing allocations to fixed income as retirement approaches. The objective is straightforward—mitigate sequence-of-return risk and limit drawdowns over time.
For decades, that framework appeared to work as intended. But recent market experience suggests it may not always deliver the level of protection many advisors assume.
When Diversification Fails to Diversify
The traditional glide path relies on a foundational assumption: that bonds will counteract equity losses during periods of market stress.
That relationship held for roughly four decades—across the entire post-1981 falling-rate environment—long enough to become embedded in portfolio design as though it were permanent. But it is not structural; it is conditional. And in certain environments, it breaks down.
In 2022, it didn’t just weaken. It failed.
Traditional glide paths don’t actually reduce equity risk. They attempt to offset it with another asset class—bonds. When that offset fails, the risk remains, fully intact, precisely when participants can least afford it.
Equities and bonds declined together—simultaneously—as inflation and aggressive rate hikes drove repricing across both asset classes. The Bloomberg U.S. Aggregate Bond Index fell over 13%, its worst year on record. The supposed hedge didn’t hedge. The diversification benefit that the entire glide path framework depends on simply wasn’t there.
The result exposed real vulnerability. Conservative target date vintages—the funds closest to retirement, designed to emphasize capital preservation—suffered drawdowns that rivaled aggressive growth allocations. For a participant with $500,000 in a near-retirement vintage, that meant a loss approaching $100,000 in a single year, from the strategy that was supposed to protect them.
This wasn’t a stress test. It was the actual outcome. And it exposed a core issue that the industry has been slow to confront: traditional glide paths don’t actually reduce equity risk. They attempt to offset it with another asset class—bonds. When that offset fails, the risk remains, fully intact, precisely when participants can least afford it.
Rethinking How Risk is Managed
If the objective of a glide path is to reduce downside risk, then the answer should be to reduce it directly—not hope that bond allocations do it for you.
The tool for that is straightforward: protective put options. A put option gives the holder the right to sell at a specified price, effectively setting a floor on losses. When applied within a target date fund, puts allow portfolio managers to define the maximum downside a portfolio can experience—contractually, not probabilistically.
This is fundamentally different from the traditional approach. Instead of swapping equities for bonds and hoping the correlation holds, a put-protected portfolio maintains its equity exposure while purchasing explicit insurance against losses beyond a defined threshold. The protection doesn’t depend on correlations. It doesn’t depend on the rate environment. It is contractual.
The difference is akin to wearing a seatbelt versus simply driving more slowly—one provides direct protection regardless of conditions, while the other just reduces the probability of a bad outcome and offers nothing when one arrives.
This creates a different framework for glide path construction. Instead of steadily reducing equity exposure as retirement approaches, portfolios can maintain participation in equity markets while increasing the level of put protection over time. The “glide” becomes less about shifting assets and more about systematically tightening the floor on losses.
This concept—often described as a “risk replacement” approach—focuses on replacing a portion of equity downside risk rather than replacing equities themselves. The intent is to preserve long-term growth potential while improving the consistency of outcomes across market cycles.
How This is a Game Changer for 2022 Performance
The distinction between these approaches becomes most visible exactly when it matters most: during periods of market stress. And 2022 provided the clearest test case in a generation.
Many conservative target date strategies experienced meaningful drawdowns despite heavy allocations to fixed income. At the same time, portfolios with substantially higher equity exposure—but incorporating explicit put protection—demonstrated a materially different outcome.
Despite significantly higher equity exposure, a 2060 strategy with explicit downside protection experienced a materially smaller drawdown—not only relative to its 2060 benchmark, but relative to even the most conservative target date option. This underscores the importance of how risk is managed, not just how assets are allocated.
The numbers tell the story clearly. The S&P target date 2060 benchmark—a standard unprotected glide path—declined 23.7%. A leading retirement income fund, the most conservative option available, declined 19.0%. A 2060 strategy incorporating explicit put protection experienced a drawdown of just 17.0%.
Read that again: the highest-equity portfolio in the comparison, when directly protected, produced a smaller loss than even the most conservative retirement income allocation. The portfolio with the most equity risk delivered the least downside pain.
That outcome runs counter to every conventional glide path assumption. But it highlights a critical point for advisors: the method of risk management may matter more than the level of equity exposure itself.
For clients nearing or in retirement, that distinction is not academic. Sequence-of-return risk is driven by drawdowns, not allocations.
A Fiduciary Consideration
Target date funds remain one of the most effective tools for delivering diversified portfolios at scale. Their role as QDIAs makes them central to participant outcomes.
But that same role also elevates the importance of ongoing evaluation.
Fiduciaries are not only selecting an asset allocation—they are selecting a risk management framework. And that framework should be evaluated based on how it performs when market assumptions are stressed. Under the prudent expert standard, the duty extends beyond choosing a reasonable allocation to evaluating whether the risk management approach embedded in that allocation remains fit for purpose.
Recent experience suggests that relying solely on stock-bond diversification may not consistently provide the level of downside protection intended in glide path design.
For advisors, this creates an opportunity to reassess whether indirect diversification remains sufficient—or whether incorporating more direct forms of risk management, such as protective puts, could better mitigate sequence-of-return risk and improve investor outcomes.
Next Evolution of the Glide Path
The traditional glide path was built in a market environment where bonds reliably diversified equities. That assumption is not a certainty—and 2022 proved it.
A more resilient approach may be one that maintains exposure to growth assets while increasing the precision of downside risk management as retirement approaches—not through asset class substitution, but through explicit protection.
That shift reframes the role of the glide path. It is no longer just an allocation schedule. It becomes a true risk management process—which is what it was intended to be from the start.
For advisors, the key question is not simply how much equity or bonds a portfolio holds—but how effectively it is designed to behave when markets don’t. Because ultimately, that is what clients experience, and what fiduciaries are accountable for.
SEE ALSO:
• Confidence in Target Date Funds is a Mistake Waiting to Happen
• Target Date Fund Assets Surge to $4.8T as CITs Gain Market Share
Mike Dever is Founder, CEO and Portfolio Manager of Brandywine Asset Management, an investment firm focused on risk-managed equity strategies designed to provide downside protection while maintaining long-term growth exposure. Brandywine manages a suite of 14 core Enhanced and Target Date Funds for qualified retirement plans, as well as a hedge fund for institutional and high net worth investors. He is a featured subject of three books, numerous interviews and articles, and the author of a best-selling investment book, “Jackass Investing: Don't do it. Profit from it."