ETF Share Classes to Reshape Asset Management Gradually
The SEC recently approved several applications to allow ETF share classes within existing mutual funds, a move widely portrayed as a watershed moment for the asset management industry—and in many respects, it is. However, advisors should expect the impact on the product landscape to be more gradual than headlines suggest. While the regulatory milestone is significant, implementation will be shaped by operational complexity and business considerations rather than market enthusiasm. This is a structural shift, not a stampede.
The Next Phase of ETF Evolution
The last major inflection point in the ETF industry came in 2019 with the adoption of Rule 6c-11. That rule modernized the regulatory framework for most ETFs and resulted in a surge in launches, broader adoption of active strategies, expanded use of custom baskets and continued asset migration into ETFs. Since 2019, the number of U.S.-listed ETFs has more than doubled to over 5,000—yet more than $22 trillion remains in mutual funds.
The SEC’s exemptive relief for dual share class structures represents the next step in the evolution of the ETF marketplace. For years, Vanguard operated under a patent that allowed ETF and mutual fund shares to coexist within the same portfolio. With that patent expired and relief extended to additional sponsors, the structure is no longer exclusive.
The implications are significant. Mutual fund strategies with meaningful scale and proven track records can now potentially be delivered through an ETF wrapper. Investors may gain access to seasoned investment processes while benefiting from the tax efficiency and intraday liquidity of the ETF vehicle. For advisors, the appeal is clear – but significance does not equate to immediacy.
Why Adoption Will Take Time
Despite the excitement, adoption will likely be deliberate. Operational readiness, regulatory guardrails and business considerations will determine the pace.
Supporting both mutual fund and ETF share classes within a single portfolio requires more than regulatory approval. Key factors shaping the rollout include:
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Operational infrastructure. Firms must ensure that trading, accounting and distribution systems can accommodate ETF creation and redemption activity alongside traditional fund flows.
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Share class exchanges. The ability to convert mutual fund shares into ETF shares without triggering a taxable event remains a critical but still-developing capability. Until an industry-wide mechanism exists, scalability will be limited.
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Cost allocation and regulatory oversight. The SEC has emphasized preventing cross-subsidization between share classes. Asset managers must establish robust cost allocation frameworks to ensure ETF shareholders are not subsidizing mutual fund shareholders, and vice versa. Brokerage costs, transaction expenses and tax implications must be carefully evaluated and monitored.
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Business and distribution considerations. ETF share classes may carry lower expense ratios, raising pricing and cannibalization questions. Wealth management platforms must determine how to position ETF and mutual fund versions of the same strategy, particularly given differences in embedded fee and revenue structures.
For these reasons, advisors should expect firms and platforms to approach rollout decisions with caution rather than speed. Most issuers will take time to assess infrastructure, operating models and strategy suitability before moving forward.
What Advisors Should Expect in the Years Ahead
If the near-term rollout is measured, the longer-term implications are substantial.
Advisors can expect a gradual expansion of ETF offerings tied to established mutual fund strategies. Many active managers bring decades of track record and significant scale. Dual share classes provide a pathway to deliver those portfolios in ETF form, potentially enhancing tax efficiency and expanding implementation flexibility.
Over time, this may reshape how active management strategies are deployed. Rather than choosing between a mutual fund and an ETF version of a strategy, advisors may increasingly have access to both—allowing for more precise placement across taxable and tax-advantaged accounts.
Not every strategy will be suited to the ETF wrapper. Less liquid or capacity-constrained strategies may face structural limitations in an ETF format. Advisors should evaluate whether a strategy’s characteristics translate effectively into the ETF structure.
As more asset managers enter the market, ETF counts may rise. Advisors will likely face a more crowded shelf, including ETF versions of long-standing mutual funds. Differentiation will still depend on investment process, team stability, performance consistency and risk management, not simply the wrapper. In evaluating new launches, advisors should focus less on the vehicle and more on whether the underlying strategy and track record support the potential for sustained outperformance.
The approvals and early launches represent an important milestone in ETF development. But the benefits will accrue over years, not quarters. Advisors who understand that timeline will be better positioned to evaluate new offerings thoughtfully and incorporate them where appropriate.
This evolution will be meaningful, but gradual—reinforcing the importance of disciplined, forward-looking allocation decisions.