Path x(t) — discrete OU process: x[t+1] = ρ·x[t] + σ·ε, ρ = e−α
Rolling variance (window 80 points)  ·  lag-1 autocorrelation rescaled
rolling variance lag-1 autocorrelation
Recovery rate α 0.30
Noise σ 0.30
measured variance
measured AC1
theory variance
σ²/(1−ρ²)