How Financial Trading Works

Lesson 6 of 12

What Is Market Volatility?

Volatility describes how much and how quickly a financial market's price changes.

Some markets move gradually.

Others can rise or fall significantly in a very short period.

The greater the size and speed of the movements, the more volatile the market is considered.

High volatility

Suppose an instrument normally moves around 0.5% per day.

Following an unexpected announcement, it moves 4% in a few hours.

The market has experienced a significant increase in volatility.

Low volatility

A market experiencing relatively small and gradual movements is considered less volatile.

Low volatility does not mean the market cannot move.

It simply means price movements have recently been more limited.

What causes volatility?

Many events can cause volatility to rise.

These include:

  • Economic announcements

  • Interest-rate decisions

  • Elections

  • Geopolitical developments

  • Company earnings

  • Unexpected news

  • Changes in market sentiment

  • Sudden changes in supply and demand

Is volatility good or bad?

Volatility is neither automatically good nor bad.

It represents movement.

For traders, larger price movements can create opportunities, but they can also increase risk.

A position can move against a trader much faster during volatile conditions.

Volatility and trading conditions

High volatility can sometimes be accompanied by:

  • Wider spreads

  • Faster price changes

  • Increased slippage

  • Larger intraday movements

This is why traders need to understand both expected return and potential risk.

Lesson summary

  • Volatility measures the degree of market price movement.

  • Higher volatility means larger or faster price movements.

  • News and economic events can increase volatility.

  • Volatility can create opportunities and additional risk.

  • Trading conditions can change during highly volatile periods.