What regime persistence really means

Persistence is empirical

Calm regimes cluster with calm regimes. Stress regimes cluster with stress regimes. This is not theory — it is one of the cleanest empirical observations in volatility research, consistent across decades, visible in VIX autocorrelation, GARCH residuals, and realized volatility clustering. The next session almost always resembles the current one.

Persistence is not prediction

Persistence is a statement about continuity, not a forecast about direction. It does not say the market will go up or down. It says the regime context — the structural setting in which prices and hedging behavior unfold — is far more likely to extend than to break. That is a probabilistic frame, not a directional claim.

Why continuity beats reversal forecasting

Forecasting reversals requires being right about timing, magnitude, and direction simultaneously. Reading continuity requires being right about one thing: that the next state will most likely resemble the current one. The base rates favor the second discipline. Persistence is the conservative, structurally honest reading.

What persistence is not

It is not a guarantee. It is not permanent. Regimes do transition, and the transitions are usually signposted in advance by curve flattening, breadth deterioration, and dispersion shifts. The point is that until those signposts appear, the empirical base case is continuity — and the institutional reading respects that.