What the DOL’s Proposed Designated Investment Alternative Rule Signals for Default Investment Governance
In January 2026, the Department of Labor transmitted for review a proposed rule titled Fiduciary Duties in Selecting Designated Investment Alternatives. While the formal Notice of Proposed Rulemaking has not yet been released, the direction of the proposal is already clear: investment oversight is being asked to catch up with the growing structural complexity of defined contribution plan menus – particularly Target-Date Funds.
Historically, the disclosure frameworks governing designated investment alternatives assumed a relatively straightforward environment of daily-priced instruments, public benchmarks, comparable (and clear) fee structures, and holdings transparency. That assumption is increasingly at odds with the direction of TDF structural design.
Target-date strategies increasingly incorporate diversified credit exposures, derivatives overlays, multi-manager implementations, and, in some cases, insurance components and/or private asset sleeves. Governance and disclosure ecosystems built around mutual-fund investment menus are now encountering portfolios that look very different.
What the Proposal Is Expected to Address
Based on regulatory summaries and agency direction, the proposal is intended to clarify fiduciary expectations when selecting designated investment alternatives that include alternative exposures such as:
private equity
private credit
real estate
infrastructure
digital assets
insurance components
The policy objective is explicit: expand access to alternative assets where fiduciaries determine they improve risk-adjusted participant outcomes. This represents a structural change as well as a shift in regulatory focus from investment menus to investment architecture. This is a seemingly subtle, but important distinction.
Why the DIA Framework Matters More Than It Used To
Historically, the designated investment alternative disclosure framework under ERISA §404a-5 standardized participant disclosures around:
performance
fees
benchmarks
asset allocation
In a menu dominated by relatively plain-vanilla 40-Act funds, those categories supported comparisons that could be considered meaningful. Today, TDF design may (or may soon) depend on additional features that were not necessarily conceived of previously in a DC context:
liquidity architecture
valuation methodology
implementation structure
glidepath philosophy
manager discretion
The primary question now is no longer how the portfolio performed, but instead how it works.
The proposal implicitly acknowledges that change in emphasis.
A Shift from Performance Transparency to Implementation Transparency
Participants, as well as fiduciary committees, are often being asked to evaluate strategies whose potential outcomes are not understood through trailing returns or expense ratios alone. Instead, investment outcomes increasingly depend on:
how liquidity is sourced
how portfolio assets are valued
how implementation layers interact
how glidepaths express a philosophy of risk over time
Therefore, disclosure rules built for comparability across mutual funds must be adapted to make comparisons across structures.
Implications for Target-Date Fund Oversight
For committees evaluating QDIAs, the proposal, regardless of the rule’s eventual form, reinforces the governance reality that default investment oversight can no longer be limited to benchmarking and fee comparisons. It increasingly requires understanding how outcomes are produced, which includes documenting:
Implementation Structure
Is the strategy proprietary single-manager or multi-manager?
Fund-of-funds or direct implementation?
Passive at the sleeve level but active at the glidepath level?
These distinctions can meaningfully shape outcomes even when the labels appear similar.
Liquidity Architecture
As less frequently traded instruments enter default portfolios, committees must understand how participant liquidity expectations are supported:
What buffers exist?
How would portfolio sales occur under stress?
Does gating authority exist?
These are structural questions, not performance questions.
Benchmark Interpretability
Traditional benchmarks assume comparable investable universes.
Increasingly, the benchmark and the portfolio are solving different problems.
The proposal implicitly recognizes the limits of relying exclusively on benchmark-relative evaluation in complex default structures.
Participant Comparability Across Options
The original purpose of the DIA framework was to support participant decision-making across alternatives, but comparability itself may become a governance issue in cases where investment structures differ materially in:
valuation frequency
liquidity profile
glidepath construction
diversification sources
The proposed revisions acknowledge that tension.
What This Signals About the Direction of DC Regulation
The proposal does not mandate structural changes to default investments but it does recognize that default investment design is evolving faster than the disclosure systems built to describe it.
As committees evaluate private allocations, insurance components, custom glidepaths, and multi-manager architectures, disclosure expectations will continue moving toward implementation transparency rather than simply providing transparency of performance.
An Emerging Debate About the Proposal’s Practical Effect
An early debate surrounding the proposal is already taking shape.
Some observers view the rule as a constructive step toward clarifying how fiduciaries may evaluate increasingly complex designated investment alternatives, particularly where portfolios incorporate private assets, insurance components, or multi-layered implementation structures. This perspective views clearer expectations around liquidity, valuation, and comparability as a mechanism to reduce uncertainty for fiduciary committees.
There is another viewpoint, however. By identifying the structural dimensions fiduciaries are expected to evaluate, the proposal may also define, in a more explicit way, the areas in which fiduciary process could later be challenged.
Given these perspectives, any additional clarity provided by the rule may function both as guidance for committees and as a framework against which selection decisions may be assessed after the fact. These interpretations can both be true simultaneously. The proposal does not change the underlying prudence standard but does make the structural features of designated investment alternatives that committees are increasingly expected to understand and document more visible. The practical implication for fiduciaries then is that the rule is best understood as expanding the scope of what constitutes a well-documented evaluation process.
A Governance Opportunity for Committees
Rather than treating the proposed revisions as a compliance exercise, and regardless of the rule’s final implementation, or even whether it is implemented at all, fiduciaries should consider treating the proposal as a preview of where default-investment oversight is heading and enhance their process around:
documenting liquidity assumptions
articulating glidepath philosophy
understanding implementation layers
evaluating valuation practices
assessing participant comparability across options
Committees that incorporate these dimensions today will be far better positioned as disclosure expectations continue to evolve.
Fiduciary Bottom Line
When taken together with recent developments in private credit and other less frequently traded assets and their inclusion within default portfolios, the proposed rule can be understood as part of a broader transition already underway in defined contribution oversight. As default investment structures incorporate new sources of return, diversification, and lifetime income features, fiduciary responsibility increasingly extends beyond evaluating performance outcomes to understanding the philosophy, process, and risks through which those outcomes are produced. In that environment, disclosure frameworks, liquidity governance expectations, and documentation standards will continue to evolve. The emerging question for committees is no longer whether alternative exposures belong in default investments (different committees will almost certainly reach different conclusions on that score), but whether the governance infrastructure surrounding those exposures is mature enough to support participant outcomes under stress as well as in expectation.
