Wu says that Bloomberg ETF analyst Eric Balchunas stated that the U.S. SEC has solicited public comments on new types of ETFs, partly due to the recent surge in applications for prediction market ETFs. The SEC aims to establish a unified framework to clarify which products are suitable for issuance in ETF form, promote standardization of the approval process, reduce backlogs, and prevent issuers from gaining regulatory advantages by submitting applications early.