The CBOE VIX, the market's 30-day expected volatility — live, with what today's level signals.
VIX measures the 30-day expected volatility of the S&P 500, derived from options prices. It is widely called the market's 'fear gauge'.
Below 15 is calm, 15–25 is normal, 25–35 is elevated stress and above 35 signals serious risk-off. Spikes usually coincide with sharp equity sell-offs.