CBOE Volatility IndexVIX

The VIX, often called the 'fear index', measures the market's expectation of S&P 500 volatility over the next 30 days. It typically rises when stocks fall and investors grow nervous, and drops when markets are calm — so it usually moves opposite to the S&P 500. The VIX is not something you invest in for growth; it is a gauge of sentiment and a hedging tool, accessed through specialized futures and exchange-traded products. These products can decay over time and are complex — understand them fully before trading.