Volatility measures how much, and how fast, a price swings up and down over time. High volatility means large, rapid moves in both directions; low volatility means a calmer, steadier price. It is the most common shorthand for how risky an asset feels to hold.
Crucially, volatility describes the size of the moves, not their direction. A highly volatile asset is not necessarily heading down — it is simply capable of moving a long way quickly either way, which is what makes it stressful to hold and easy to mistime.
Different asset classes sit at very different baselines. A blue-chip stock that typically moves about 1% a day is far calmer than a coin that routinely swings 10% or more. Matching the volatility you take on to your own tolerance is a core part of managing risk.
Worked example
A major coin routinely swinging 10% in a day is far more volatile than a traditional large-company stock that moves 1%.
Related guides
This definition is general education, not investment advice. Markets — especially crypto — are volatile and you can lose money. Please read our disclaimer and see our methodology.