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Johns Hopkins Study: Private Equity, 401(k)s Do Not Mix

Reported by Plansponsor
Mar 19, 2025· 3 min read
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Key Takeaways
  • • Johns Hopkins Carey Business School research argues that private equity—particularly leveraged buyout funds—is structurally unsuitable for 401(k) plans due to high fees, poor liquidity, and inconsistent outperformance versus public equity markets.
  • • Private equity funds typically require 2.5 years to invest 60% of committed capital and take over 12 years to exit portfolio companies, creating extended lockup periods incompatible with retirement plan participants' liquidity expectations.
  • • The Trump administration's 2020 Department of Labor guidance permitted private equity inclusion in professionally managed funds like target-date funds; the Biden administration subsequently cautioned fiduciaries on risks, and regulatory direction may shift further under the current administration.
  • • Jeffrey Hooke, adjunct professor at Johns Hopkins Carey Business School and study author, identifies high fees, failure to consistently beat stock market returns, and illiquidity as primary disqualifying factors for retail retirement plan integration.
Summary
A new research report from Johns Hopkins Carey Business School challenges the industry trend of incorporating private equity into 401(k) plan menus, arguing that the asset class fundamentally conflicts with the safety and accessibility expected from workplace retirement vehicles. The study, authored by Jeffrey Hooke, an adjunct professor at the institution, contends that leveraged buyout funds—which pool capital from a limited investor base to acquire privately held companies with minimal public reporting—present structural incompatibilities with defined contribution plan design and participant needs.

The core argument centers on three critical deficiencies. First, private equity funds charge substantially higher fees than traditional equity investments, eroding net returns to plan participants. Second, despite their prominence, private equity funds have failed to "frequently beat the stock market" on a consistent basis, undermining their value proposition relative to lower-cost public equity alternatives. Third, and perhaps most significantly, illiquidity creates structural misalignment with retirement savings instruments. The study found that median private equity funds require 2.5 years simply to deploy 60% of committed capital, while large established firms frequently exceed 12 years before exiting their portfolio company positions—creating extended lockup periods that conflict with participants' reasonable expectations for retirement asset accessibility.

The regulatory environment surrounding private equity in retirement plans has shifted considerably. In June 2020, the Trump administration's Department of Labor issued guidance permitting private equity inclusion in professionally managed funds such as target-date funds. The subsequent Biden administration took a more cautious stance, issuing supplemental guidance that urged fiduciaries to carefully weigh risks and benefits before incorporating private equity into defined contribution plan menus. With the return of the Trump administration in 2025, observers anticipate further regulatory loosening around private equity access to the retirement plan market, which industry participants view as a largely underpenetrated pool of capital. The Johns Hopkins research appears positioned as a countervailing voice in this debate, questioning whether expanded private equity access serves plan participants' interests or primarily advances asset managers' growth objectives.

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Plansponsor Johns Hopkins Study: Private Equity, 401(k)s Do Not Mix