1. Free SPY GEX: Rebuilding a Gamma-Exposure Snapshot When Your Options Feed Goes Dark

    My morning game plan opens with a gamma-exposure snapshot — the one read that tells you whether the day will mean-revert and pin or trend and extend. Then it started printing UNAVAILABLE. GEX lives and dies on open interest, so here’s why a paid options API wasn’t the fix, and how CBOE’s free public feed brought it back — with the insight that makes the “free and delayed” version actually correct.

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