Volatility: why prices jump around

Volatility is the degree to which prices swing up and down. Equity is volatile: its value can move sharply day to day and year to year. Beginners often mistake this for danger or malfunction. It is neither. It is simply what a market of millions of changing opinions looks like.

The jagged line that still climbs

Notice the shape: the line lurches down and up repeatedly, yet the long-run direction is up. The dips are real and uncomfortable in the moment, but they are the noise around a rising trend, not the trend itself.

Why it matters for your behaviour

Volatility only hurts you if it makes you act, selling in a panic when prices fall, then missing the recovery. For a long-term investor who stays put, volatility is a ride to sit through, not a loss to lock in. Understanding this is what separates investors who earn the long-run return from those who don't.

Short-term volatility is the toll you pay for long-term growth. The asset with no volatility (cash) also has almost no growth. The bumps and the returns come together.