Americas Reg Desk

Friday, 2026-09-18 · covering the last 24h

United States

NYSE group amends Level 3 circuit-breaker resumption rules for 23-hour trading. NYSE, NYSE American, NYSE Texas and NYSE National each filed changes to Rule 7.12/7.12E governing how trading resumes after a market-wide circuit-breaker halt, tied explicitly to the industry's move to a 23-hour, five-day trading week. Effective immediately on filing; a direct mechanics update to how a halt unwinds once overnight sessions are running. SEC filing (SR-NYSE-2026-43)

Cboe's four equities exchanges launch a "Data Vendor Program." BZX, BYX, EDGA and EDGX filed for immediate effectiveness, creating a new "Data Vendor" distributor category and setting or waiving External Distribution Fees for specific feeds (EDGX Top, Summary Depth, Cboe One Premium/Summary). Affects market-data redistributors' fee exposure. Federal Register notice (EDGX)

SEC proposes rescinding Rule 14a-8 and amending Rule 14a-4. The Commission's 17 September proposing release would eliminate the federal rule requiring companies to include shareholder proposals in proxy materials, alongside broader proxy-solicitation changes — a major overhaul of the shareholder-proposal and proxy-access framework for listed issuers, now out for comment. SEC proposing release

No material CFTC or FINRA rulemaking, and no Federal Reserve Board rulemaking or supervisory guidance reaching market participants, in the window.

Canada

No material items from CSA/OSC, CIRO or TMX in the window, and no new Bank of Canada FMI rulemaking.

Latin America

No material items from B3/CVM/BCB, BMV/BIVA/CNBV/Banxico or Chile's CMF/BCCh in the window (Chile's markets ran reduced hours for the 18 September Fiestas Patrias holiday).

Informational only — summaries of public regulatory and central bank sources; not advice.