Ivolution Research Journal · Preregistration
OPEX gamma concentration and last-hour range
On monthly OPEX days, last-hour SPY realized range is LOWER when a single near-money strike holds a large share of total near-money gamma than when gamma is dispersed.
GEX-12 · v1·Proposed·Plausible — unproven·Dealer gamma
Cite as: GEX-12: OPEX gamma concentration and last-hour range. Ivolution Research Journal.
Publication status
The study is pre-registered and awaits execution. No result exists yet.
The abstract and product-safe scope metadata are public. Methodology, falsification, limitations, citations, and governed results for GEX-12 are available to Terminal + AI members.
Symbols
SPY
Regimes
Aggregate · Positive gamma · pin · Positive gamma · drift · Negative gamma · trend · Negative gamma · chop · Event day
Horizons
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