Essential

Volatility

A measure of how much and how quickly prices change, indicating market uncertainty and risk.

Definition

Volatility measures the degree of price variation over time. High volatility means large, rapid price swings; low volatility means stable, slow-moving prices. It's a key factor in risk assessment, option pricing, and position sizing.

How It Works

  • Measured by standard deviation of returns
  • VIX index measures S&P 500 volatility
  • ATR (Average True Range) measures daily volatility
  • Higher volatility = higher risk and opportunity

Types of Volatility

Historical Volatility

Based on past price movements

Implied Volatility

Expected future volatility from options

Realized Volatility

Actual volatility that occurred

Trading Tips

1

Reduce position size in high volatility

2

Spreads widen during volatile periods

3

News events spike volatility

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