The VIX Explained: What the Fear Index Measures and Every Spike Since 1990
The price of 30-day insurance on the S&P 500 — and 36 years of what it did around every crisis.
What the VIX actually measures
The CBOE Volatility Index is the market's consensus estimate of S&P 500 volatility over the next 30 days, extracted from option prices and expressed as an annualized percentage. A VIX of 20 means options are priced for ±20% annualized movement — about ±1.25% daily. It is not a fear survey; it is the actual price of insurance.
The current reading, in context
VIX today: 16.1 (as of 2026-07-02). Across 9,220 trading days since 1990, the average is 19.4. The all-time closing high was 82.7 on 2020-03-16 — the COVID crash — narrowly above the 80.9 print of November 2008.
| Regime | VIX range | Historical frequency |
|---|---|---|
| Complacency | < 15 | Roughly a third of all days — mid-90s, 2005–06, 2017, 2023–24 |
| Normal | 15 – 25 | About half of history |
| Stress | 25 – 40 | Recessions, corrections — 737 days closed above 30 |
| Crisis | > 40 | Only 208 days in 36 years: 1998, 2001, 2002, 2008–09, 2010, 2011, 2015, 2018, 2020, 2024 |
Three properties worth knowing
- Mean reversion is violent. VIX spikes decay fast — the index has never stayed above 40 for more than a few months. Panic is a spike, not a state.
- VIX clusters. Calm begets calm; stress begets stress. A VIX at 12 tells you more about the last month than the next one.
- Extreme highs mark bottoms better than extreme lows mark tops. Every VIX close above 45 in history has landed within months of a major equity low (2008–09, 2020). Low VIX, by contrast, can persist for years.
FAQ
What is the VIX right now?
16.1 as of 2026-07-02 — versus a long-run average of 19.4 since 1990.
What is a high VIX number?
Above 30 historically signals crisis pricing (737 days since 1990); above 40 is rare (208 days). The record close is 82.7 (2020-03-16).
Is a low VIX bullish or bearish?
Low VIX reflects realized calm and cheap hedges; it is not by itself a sell signal — sub-15 regimes have lasted years (1995–96, 2017, 2023–24). Rapid rises off a low base matter more than the level.
Computed from /api/sp500/vix.json, refreshed each trading day.