Regime Change
A persistent shift in the statistical relationships that govern asset returns, usually triggered by a structural change in policy, inflation, or growth.
Definition
A regime is the prevailing combination of growth, inflation, and policy that makes certain factor exposures profitable and others a drag. Regimes shift when the underlying drivers do — a move from disinflation to inflation, from QE to QT, from globalization to fragmentation.
Returns that worked in the prior regime usually fail in the next; the strategies that thrive are the ones designed for the new combination.
Public research record
Research framework · page evidenceCompleted application: Regime Change
Most portfolio drawdowns occur because a stable allocation was built for the prior regime and is the last to adapt.
| Type | Claim | Scope |
|---|---|---|
| Release fact | A persistent shift in the statistical relationships that govern asset returns, usually triggered by a structural change in policy, inflation, or growth. | Macro |
| Release fact | 2022: a multi-decade disinflation regime ended. The 60/40 portfolio — designed for stocks and bonds to diversify — had its worst year since the 1970s as both fell together. | Published example |
Countercase, invalidators, and sources
The relationship is conditional: another driver can dominate the same asset over the selected horizon.
- · The underlying observation changes materially.
- · The selected asset has no measurable exposure to this mechanism.
Why it matters
Most portfolio drawdowns occur because a stable allocation was built for the prior regime and is the last to adapt.
Worked example
2022: a multi-decade disinflation regime ended. The 60/40 portfolio — designed for stocks and bonds to diversify — had its worst year since the 1970s as both fell together.