The debate over private-market investments within defined contribution plans was largely theoretical for the past few years. Are private-market investments a worthwhile addition to the diversification opportunity set? Can private investments provide DC participants with access to risk premiums traditionally available only to institutional investors? On the other hand, are the fees, illiquidity, valuation challenges, and overall complexity inherently unsuitable for participant-directed retirement plans? It is safe to say that the debate has moved from the theoretical into implementation.

Recent proposed updates by the U.S. Department of Labor to the Designated Investment Alternatives (DIA) disclosure safe harbor may appear technical at first glance. But for fiduciaries overseeing target-date funds and other default investments, the proposal signals something more important:

A shift toward structural transparency expectations in defined contribution plan investment oversight.

While the proposal focuses on disclosure mechanics, its implications extend directly into how committees evaluate increasingly complex default investment architectures.

The continued evolution, and surrounding debate, of private markets in defined contribution plans makes clear that oversight of the default investment is far more encompassing than reviewing glidepaths, hindsight-oriented performance, or fees alone.

Governance must also address liquidity engineering, structural alignment, and participant equity under stress.

Default investment solutions within most defined contribution plans are no longer merely placeholders. The investment selection that plan sponsors make on behalf of their participants is, whether by design or by inertia, the portfolio the majority will hold for much of their working lives.

The following ten questions are not designed to produce “right answers.” They are intended to surface whether a plan’s default investment is being actively governed or merely assumed. While the questions and related governance considerations are outlined here, several will be explored in greater depth in future insights throughout the year.