In January, the SEC under chairman Paul Atkins approved a major change allowing traditional mutual funds to offer ETF share classes, a shift that could reduce capital gains tax burdens for millions of US investors and reshape participation in the capital markets.
The SEC’s move to modernize fund structures enables investors to switch between the two without triggering immediate capital gains taxes that typically arise when mutual fund shares are sold to meet redemptions. According to Atkins’ op-ed in the Washington Post, the new framework extends the tax efficiency of ETFs to mutual fund investors and aims to improve choice and competition in the fund industry.
The relief stems from long‑pending exemptive applications under the Investment Company Act of 1940 that sought approval for dual share class funds, where an ETF and a mutual fund share class operate side by side within the same portfolio. Asset manager Dimensional Fund Advisors received formal SEC approval to launch ETF share classes on 13 of its existing mutual funds, clearing the last regulatory hurdle that had stood in the way of these hybrid products. The approval positions Dimensional to be the first new entrant beyond Vanguard to offer this dual structure, which had been possible only under a patent that expired in 2023.
The practical effect for investors is meaningful tax relief and greater flexibility. Mutual funds can distribute capital gains when securities are sold to meet redemptions, and shareholders may owe taxes even if they did not sell their own shares. ETFs generally avoid this because of their creation and redemption mechanisms, which allow in‑kind transfers that do not trigger taxable events.
The SEC’s order allows more investors to benefit from the same tax advantages without selling shares in ways that incur capital gains taxes. The opinion piece in The Washington Post noted that the change could significantly reduce capital gains taxes for everyday households, citing data showing that mutual funds distributed about $175 bn in capital gains in 2024 and that more than 120 million US investors hold mutual funds.
Industry responses highlight the broad impacts on capital markets. The Investment Company Institute, which has advocated for ETF share class relief for years, said the SEC’s order permits the first funds to offer both mutual fund and ETF share classes and represents a significant step in fostering innovation within the regulated fund industry. By delivering this relief, ICI and others argue, the industry can offer meaningful benefits to shareholders through enhanced efficiency and competition.
The SEC’s public notice and approval also look likely to clear a path for other asset managers. Regulatory filings and industry observers note that nearly 80 firms have applied for similar exemptive relief since Vanguard’s patent expired, and the Dimensional approval has clarified the template for future applications. This could accelerate the adoption of dual share class funds across the industry, potentially bringing hundreds of mutual funds into ETF share class form and narrowing the structural gap between mutual funds and ETFs over time.
For US capital markets, the impact extends beyond individual tax savings. Lower tax friction on investment switches and greater fund choice may encourage more active portfolio management and increase market liquidity. The broader availability of ETF share classes could also intensify competition among fund providers, potentially driving down costs and encouraging innovation in product design. Enhanced tax efficiency may make the US market more attractive to both retail and institutional investors seeking cost‑effective strategies and could boost overall market engagement.
As the first dual share class funds prepare to launch, investors and market professionals will be watching closely to assess how broadly the tax advantages and structural benefits translate into real‑world outcomes. Will this shift mark a structural transformation in how Americans invest for long‑term goals and retirement, or will hurdles in implementation slow adoption and limit its reach?