PUBLIC DATA / EXPLAINED
VIX volatility monitor
Product documentation · Updated
Shield's VIX volatility alert dashboard tracks the Cboe VIX daily close and highlights when it crosses a transparent threshold. Use the chart to inspect recent observations and follow the source link to verify the data.
What VIX measures
The Cboe Volatility Index uses S&P 500 option prices to estimate expected volatility over the next 30 days. It describes the expected size of market fluctuations, not their direction. It is distinct from market liquidity, a Treasury yield and a company's cash flow.
How Shield evaluates the daily close
| Daily close | Rule status |
|---|---|
| Below 20 | Normal |
| 20 to below 30 | Watch |
| 30 or higher | Alert |
| Missing or stale | Unknown |
The boundaries are product choices for a consistent monitoring view. They are not Cboe classifications, buy or sell instructions, or a forecast that a crash will occur. Normal only means this particular rule has not triggered.
What you can inspect
Open the VIX chart on the dashboard, select a 30-day or 90-day window, and inspect the observation dates and values. The view shows available daily observations; it does not fill weekends with invented prices. A rule breach can also appear in the alert center.
Daily data, not an intraday alert service
Shield uses the published daily close, checks the source every six hours and shows the as-of date. Refreshing the page does not turn a daily observation into a live quote. An observation older than five calendar days is treated as stale rather than a current risk reading. Alerts are shown on the page.
Original source and context
Verify observations with Cboe VIX historical data and consult Cboe's VIX product information. Read our sources and methodology for the other indicators and missing-data rules.