US Dollar to South African Rand GARCH Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Tuesday, July 14th, 2026
1 Day
13.52%
decreased by 0.35%
1 Week
13.56%
decreased by 0.31%
1 Month
13.72%
decreased by 0.15%
Analysis last updated: Monday, July 13, 2026 at 07:10 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Jul 10, 2026Model Insight
Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.
σ
GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0022 | 10.58*** |
α ARCH Response to squared shocks | 0.0654 | 33.20*** |
β GARCH Volatility persistence | 0.9346 | 475.36*** |
Persistence:
1.000
Half-life:
-
Other GARCH Analyses on Currencies