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Glossary · markets

What is a VIX?

The Cboe Volatility Index, expressing 30-day implied volatility of the S&P 500.

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The VIX is derived from prices of S&P 500 options. Rising VIX signals that investors are paying up for downside protection — usually because uncertainty is high.

A VIX under 15 suggests calm markets; 20–30 is normal turbulence; 40+ is crisis territory. It doesn't predict direction, only the size of expected moves.

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Frequently asked questions

Can I invest directly in the VIX?

Not the index itself. There are VIX futures and ETFs that track those futures — most are poor long-term holdings due to structural decay.

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