How Is the “Volatility Index” Used to Set the Thresholds for Circuit Breakers?

A volatility index (like the VIX in TradFi, or a crypto equivalent) measures the market's expectation of future price volatility. Exchanges can use this measure to dynamically set circuit breaker thresholds.

In periods of high implied volatility, the allowable price movement band is widened, and in low-volatility periods, it is narrowed. This ensures the circuit breaker is relevant to current market conditions, preventing unnecessary halts.

What Is a “Limit Up/limit Down” Rule in Relation to Circuit Breakers?
How Is Mining Difficulty Dynamically Adjusted in a Typical Proof-of-Work System?
How Do Circuit Breakers Affect the Execution of Pending Limit Orders?
How Does “Implied Volatility” Differ from “Historical Volatility”?
How Do Circuit Breakers and Trading Halts Mitigate the Risk of a Synthetic Squeeze?
How Are Circuit Breaker Thresholds Determined and Do They Differ between Cryptocurrency and Traditional Stock Exchanges?
How Do “Circuit Breakers” Mitigate Slippage Risk in Traditional Markets?
What Is the Difference between a Hard and a Soft Circuit Breaker?

Glossar