Definitions
In plain terms
The opening auction and the start of continuous trading may be separate events, so the exact meaning must be named.
Technical
Open semantics require venue, product, session label, date, local zone, boundary inclusivity, auction treatment, and calendar version.
Scope
It does not mean the first observed trade in a dataset.
Examples
- A governed dataset records market open explicitly instead of inferring it from an ambiguous field.
Common misconceptions
- Market Open does not have one universal meaning without its stated market, source, and time context.
Concept relationships
Prerequisites
Contrasts with
Where this concept is used
Evidence and governance
- NYSE Trading Hours and Calendars New York Stock Exchange · official exchange
Supports: preferred label, short definition, technical definition
Limits: Hours vary by venue, product, date, rule version, and exceptional notice; they are not a universal calendar.
- Fintech Builder Glossary Definition Contract The Fintech Builder · internal governed contract
Supports: variant distinction
Limits: Defines governed platform behavior rather than claiming these policies are universally prescribed by external McClellan methodology.
- Reviewed by
- fintech-builder-owner-approved
- Last reviewed
- 2026-07-26
- Next review
- 2027-07-26
- Record status
- published