Systemic behavior
What happens when many independently governed agents converge on the same action at the same time, and whether individually compliant systems can be collectively destabilizing.
Why it matters
Applies to the market, which means no single institution is positioned to govern it and every institution contributes to it. It bites in stress, when correlation rises and the assumption of independent behavior fails. It fails as a control because firm-level governance is structurally blind to it: an agent that behaves correctly given its own mandate can still be one of a thousand doing the identical thing. Of 230 control objectives, 16 touch it. It is the second-thinnest column in the crosswalk and the one with the largest tail.
What it is not
These are routinely confused with Systemic behavior. The distinctions are not pedantic — each one has consequences for how a system is governed.
Concentration is exposure to a common factor. Systemic behavior is synchronized action, which can create the concentration rather than result from it.
Herding is a behavioral description of humans. This is a structural property of systems sharing models, data and signals.
Relationships
Typed edges into the rest of the ontology. These are what make the canon traversable rather than merely readable.
| Verb | Target | Meaning |
|---|---|---|
addresses | Systemic behavior | The subject speaks to the object as a question or concern. |
relatedTo | IOSCO-TOOLKIT | An association too weak or too general for a stronger verb. |
Record
| Canonical identifier | QIS-TERM-00031 |
| Status | Canonical industry term |
| Adoption | Emerging |
| Domain · Layer | MARQUE questions · Governance |
| Origin | MARQUE question 07. Addressed at market level by IOSCO; almost absent from firm-level control frameworks. |
| Semantic aliases | None recorded. |
| First published | 2026-08-02 |
| Last reviewed | 2026-08-02 · 180-day cycle |
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