Publications Memos Go Back NYSE Amends its Material News Policy and Expands its Authority to Halt Trading 10.02.15 Effective September 28, 2015, the New York Stock Exchange (“NYSE” or “the Exchange”) amended Section 202.06 of its Listed Company Manual (the “Manual”) to: expand the pre-market hours during which NYSE-listed companies must notify the Exchange prior to disseminating “material news”; expand the timeframe and circumstances in which the NYSE has the authority to halt trading in a listed company’s security; provide guidance with respect to the release of material news after the close of trading on the Exchange; and update the methods by which companies should release material news. Related Insights 10.21.25 | Publications California Privacy, Cybersecurity, and AI Update 10.21.25 | Publications IRS Releases Proposed Regulations Under Section 897 on Domestically Controlled REITs 10.15.25 | Publications Simpson Thacher Sustainability and ESG: Regulatory Update – October 2025 Related Services Related Practice Areas Corporate Capital Markets