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Private equity could transform your retirement, Wharton alternative investment experts say, but only if it adapts to protect savers

Reported by Knowledge.wharton.upenn ·Fortune
Aug 24, 2025· 3 min read
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Key Takeaways
  • • President Trump's executive order is enabling private equity inclusion in defined contribution plans like 401(k)s, positioning private markets as a potential solution to retail investor exclusion from economic growth concentrated outside public exchanges.
  • • Private equity has delivered a 14.22% annualized net return over the past 15 years compared to 10.25% for the MSCI World Index, offering the "illiquidity premium" as a return enhancement mechanism for longer time horizons.
  • • The number of publicly traded U.S. companies has nearly halved since the mid-1990s, leaving retail investors structurally underexposed to private market growth; private equity access could address this diversification gap.
  • • Integration of private equity into retail retirement plans requires new regulatory safeguards, fee transparency, and fiduciary governance to manage inherent risks including limited liquidity, valuation opacity, and higher fee structures.
  • • Fiona Greig, global head of Investor Research and Policy at Vanguard, cautions that private assets require "access to top managers, an appetite for risk, and a long investment horizon" — not all retail savers possess these prerequisites.
Summary
President Trump's recent executive order encouraging private market investments in defined contribution plans represents a structural shift in how millions of American workers could access alternative assets for retirement savings. The policy reflects a growing recognition among policymakers and institutional experts that the traditional 401(k) model—anchored to public equities and fixed income—leaves retail investors exposed to an increasingly incomplete picture of the economy.

The economic case for private equity inclusion is quantitatively compelling. Over the past 15 years, private equity has generated 14.22% annualized net returns versus 10.25% for the MSCI World Index, according to Preqin data cited by Wharton researchers. This outperformance is underpinned by the "illiquidity premium"—the theoretical excess return investors receive for accepting capital lock-up periods. More fundamentally, the investable opportunity set has shifted: publicly traded U.S. companies have declined by nearly 50% since the mid-1990s, while private companies are staying private longer. This structural change means retail investors are increasingly excluded from the economic growth centers of the modern economy.

However, Wharton's alternative investment experts emphasize that bringing private equity into 401(k) plans requires more than regulatory blessing. The asset class carries material risks: inherent illiquidity, fee complexity, valuation opacity, and performance volatility. Recent returns have softened, and these characteristics are ill-suited for unsophisticated investors or those without sufficient time horizons. Vanguard's Fiona Greig underscores this point, noting that private assets demand "access to top managers, an appetite for risk, and a long investment horizon"—prerequisites many retail savers do not meet.

The path forward demands guardrails, not bans. Experts advocate for enhanced fiduciary governance, transparent fee disclosure, and investor education requirements to responsibly integrate alternatives into retirement plans. Without such protections, expanding access risks transferring unnecessary complexity and cost burdens from institutional investors to retail participants who may be ill-equipped to evaluate private equity's risk-return profile independently.

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Knowledge.wharton.upenn Private equity could transform your retirement, Wharton alternative investment experts say, but only if it adapts to protect savers Fortune Private equity could transform your retirement, but only if it adapts to protect savers