Disclosure, materiality & market conduct · Working
Closed period
Also called: dealing blackout
ELI5
A period restricting trading by designated insiders, often around financial results.
Used in conversation
“The draft mentions closed period, but the scope and jurisdiction are still unclear.”
Pitch context
You will see “Closed period” in annual reports, earnings decks, filings and investor presentations when the discussion reaches disclosure, materiality & market conduct.
Why it matters: In disclosure, materiality & market conduct, a loose definition can change rights, obligations, approval, disclosure or enforceability.
Caution
Meaning, enforceability and required process vary by jurisdiction and agreement; this definition is not legal advice.
Connected terms
- Earnings blackoutThe search label “Closed period” can route to both entries.
Sources & evidence · 5
Direct term-level sources and supporting source families.
- U.S. Securities and Exchange Commission — How to Read a 10-KDirect source · primary · checked 2026-08-16
- U.S. Securities and Exchange Commission — EDGAR and filing resourcesDirect source · primary · checked 2026-08-16
- OECD — G20/OECD Principles of Corporate Governance 2023Direct source · institutional · checked 2026-08-16
- IFRS Foundation / International Sustainability Standards Board — IFRS S1 and IFRS S2 Sustainability Disclosure StandardsDirect source · primary · checked 2026-08-16
- U.S. Securities and Exchange Commission — Non-GAAP Financial Measures — Compliance and Disclosure InterpretationsSupporting source family · primary · checked 2026-08-16