The U.S. Securities and Exchange Commission (SEC) is signaling what could become one of the most significant reviews of the ETF regulatory framework in years, as the rapid evolution of the $16 trillion ETF industry forces regulators to reconsider whether existing oversight tools remain adequate, according to Bloomberg.

The agency on Tuesday issued a request for comment (RFC) seeking public feedback on its ETF review process, following growing scrutiny over increasingly complex fund structures, including proposed prediction market ETFs. Rather than focusing solely on those novel products, the SEC is examining whether its broader regulatory approach is equipped to oversee an ETF market that has expanded far beyond traditional index-tracking funds.

The move comes as ETF issuers continue to roll out products tied to cryptocurrencies, leveraged single-stock strategies, options-income portfolios, defined-outcome structures, and other alternative exposures that have stretched the boundaries of what can be packaged into an exchange-traded vehicle.

Prediction Market ETFs Spark A Broader Regulatory Review

The SEC’s review follows Chairman Paul Atkins‘ directive in May asking staff to seek public input on prediction market ETFs, products that would allow investors to gain exposure to contracts tied to the outcomes of events ranging from elections to economic releases. Firms including Bitwise, Roundhill, and GraniteShares have filed proposals for such ETFs. The move underscores the regulator’s reluctance to fast-track a potentially transformative new category of ETFs.