Why Central Banks Make Recurring Policy Errors

Central banks are neither omniscient nor infallible. They operate under institutional, political and cognitive constraints that produce recurring errors, often only visible in hindsight. To see how these decisions actually filter through to households and investors, see the impact of rate moves on your wealth.

This analysis sits within the sub-pillar dedicated to central bank action and its transmission mechanisms , which examines how monetary decisions diffuse, with lags and asymmetries, through the real economy.

The lag bias

Monetary decisions rest on lagged and frequently revised data. This constraint explains why tightening cycles often arrive too late, after inflation has already taken root. In the last cycle, US CPI inflation stayed above 2% for twelve months (7.9% in February 2022) before the FOMC’s first hike on 16 March 2022, then peaked at 9.0% in June 2022. More on this sits in the framework on how rate regimes govern margin behaviour.

This bias is documented in
the analysis of overly accommodative policies.

Model dependence and the illusion of control

Econometric models struggle to incorporate regime breaks. Their excessive use leads to underestimating tail risks and non-linear dynamics.

These limits emerge clearly from
the framework and limits of monetary policy.

The inflation / unemployment asymmetry

Central banks react faster to unemployment than to inflation. This asymmetry produces a structural accommodative bias that fuels bubbles and imbalances.

This logic is laid out in
the priority targeting of inflation.

Overcorrections and collateral damage

Once the error becomes obvious, the correction is typically abrupt. Lagged effects then amplify the shock running through the real economy.

See on this point
the mechanisms of restrictive policies.

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Last updated — 7 October 2026