Strong investor opposition to the SEC’s May 2026 proposal for optional semiannual reporting on a new Form 10-S, rather than mandatory quarterly 10-Q filings, underpins the 83.5% market-implied probability that the requirement will not be removed. The proposal drew a record 200,000-plus comment letters, the vast majority against the change, citing risks to timely disclosure, capital allocation efficiency, and investor monitoring. The SEC’s Investor Advisory Committee also recommended retaining quarterly mandates, while exchanges and market participants highlighted structural reliance on frequent data. Although Chairman Paul Atkins and the administration support greater flexibility to reduce short-term pressures, the agency has not advanced to a final rule amid the feedback volume and procedural hurdles, including potential modifications or delays into 2027. Traders are pricing in these adoption barriers over policy intent.