CFTC guidance issued in March 2026 has become the main driver of trader sentiment on which designated contract markets will self-certify sports event contracts by the June 30 deadline. The staff advisory encourages DCMs to engage sports leagues in advance, use official data sources, and demonstrate compliance with core principles during self-certification under Regulation 40.2. CME already completed filings for basketball, baseball, and other sports contracts earlier this year, locking in near-certain resolution for that outcome. Smaller platforms such as LedgerX, Railbird, and Aristotle continue to file at varying rates amid ongoing state litigation and league pushback, creating uncertainty around timing and scope. Traders are watching for any last-minute certifications or CFTC stays before the cutoff.