Tonight's standouts
IV rank = where today's 30-day IV sits in its own 1-year range (0 low, 100 high). IV−HV = implied minus 20-day realised volatility, in points. P/C OI = put open interest ÷ call open interest. Exp. move = the market's 30-day move, % of price. Gamma ▲/▼ = dealers' net gamma positive (they dampen moves) or negative (they amplify them). Walls = the strike with the most call / put open interest and its distance from the price (“far” = more than 50% away). Option market A/B/C describes how busy the ETF's options are, not data quality.
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Every figure here is one row of our nightly files — more than 100 series per ETF, and the same for stocks and futures. The Viewer reads them for you.