{"schema_version":1,"publisher":"Half on a Double","data_through":"2026-10-16","frequency":"end-of-day","methodology":"market-implied-carry-v1","generation":"market-implied-carry-analytics-20260917T000000Z","canonical_url":"https://halfonadouble.com/stock/SPYG","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/SPYG.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/SPYG.json?date=2026-10-16&public_schema=4","definitions_url":"https://halfonadouble.com/methodology.md","license_url":"https://halfonadouble.com/terms.md","disclaimer_url":"https://halfonadouble.com/disclaimer.md","symbol":"SPYG","page_tier":"B","units":{"prices":"USD per share","open_interest":"option contracts","gamma_exposure":"modeled dollar-delta change per USD 1 underlying move","gamma_exposure_normalized":"modeled gamma exposure per 100,000 open option contracts","distances":"percent of close","forward_outcomes":"close-to-close percent return"},"snapshot":{"close":120.25,"previous_close":122.66999816894531,"delta_neutral":116.89071308260779,"gamma_neutral":121.3114762352001,"gamma_max":130.88045243302932,"total_open_interest":7962,"previous_open_interest":9262,"listed_contracts":177,"listed_calls":106,"listed_puts":86,"gamma_max_distance_pct":8.840293083600265,"delta_neutral_distance_pct":-2.793585794089157,"gamma_neutral_distance_pct":0.8827245199169262,"open_interest_change_1d_pct":-14.035845389764628,"call_open_interest":4387,"put_open_interest":3575,"put_call_open_interest_ratio":0.8149076817870983,"nearest_expiration_max_pain":125,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":3.9501039501039505,"all_expiration_max_pain":118,"net_gamma_exposure":-101493.41662517098,"net_gamma_exposure_per_100k_open_interest":-1274722.6403563297,"gamma_exposure_flip":121.3114762352001,"gamma_exposure_flip_distance_pct":0.8827245199169262,"call_wall":128,"call_wall_distance_pct":6.4449064449064455,"put_wall":118,"put_wall_distance_pct":-1.8711018711018712,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":2133},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":120.25,"totalOi":9507,"analysisCoverage":1,"avgIvPct":91.9,"ivRank":73.4,"iv52wHighPct":117.6,"iv52wLowPct":21.1,"frontDte":35,"termPremiumPp":-0.8984,"riskReversalFrontPp":4.74,"riskReversal30dPp":4.74,"butterflyFrontPp":4.96,"butterfly30dPp":4.96,"putCallOiRatio":0.715,"putCallOiFrontRatio":1.579,"putCallVolumeFrontRatio":1.206,"optionVolume":844,"volumeOiRatio":0.088777,"netDeltaNormalized":0.104195,"dealerDeltaNormalized":-0.103821,"gexPer100kOi":-3584819.922163,"vannaPer100kOi":452.298307,"charmPer100kOi":148427.474492,"weekendDeltaShiftPer100kOi":445282.423477,"ivSurfaceRangePp":38.5,"gammaFlipDistancePct":-49.871102,"maxPainDistancePct":-1.871102,"peakCallDistancePct":3.950104,"peakPutDistancePct":-10.18711},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/SPYG.json?date=2026-10-16&public_schema=4","interpretation":"Catalyst intensity ranks unusual option pricing and activity; it does not identify the event, predict direction or recommend a trade. Directional score summarizes relative positioning under documented model conventions."},"gamma_max_cross_outcomes":[],"missing_value_semantics":"null means unavailable; it never means zero","interpretation":"These are descriptive end-of-day model outputs. Signed GEX uses the published call-positive, put-negative convention and is not observed dealer inventory. None of the fields are live prices, predictions or investment advice."}