iPath Series B S&P 500 VIX - volatility proxy (15-min delayed)
Why: VIX volatility proxy. VXX spikes during fear events. Elevated volatility suppresses risk-taking across all asset classes.
Category: macro. Macro economic indicators track monetary policy, liquidity conditions, and traditional market positioning. Changes in these metrics often lead Bitcoin price moves by days or weeks.
Source: Finnhub. Updated: 15-min delayed (market hours).
API: GET /api/metrics/etf-vxx