{"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/EFX","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/EFX.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/EFX.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":"EFX","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":161.25,"previous_close":161.25999450683594,"delta_neutral":172.58183980680897,"gamma_neutral":194.12887096438686,"gamma_max":233.24619729394237,"total_open_interest":5270,"previous_open_interest":8464,"listed_contracts":162,"listed_calls":89,"listed_puts":82,"gamma_max_distance_pct":44.64880452337511,"delta_neutral_distance_pct":7.027497554610215,"gamma_neutral_distance_pct":20.38999749729418,"open_interest_change_1d_pct":-37.736294896030245,"call_open_interest":1679,"put_open_interest":3591,"put_call_open_interest_ratio":2.1387730792138178,"nearest_expiration_max_pain":150,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":-6.976744186046512,"all_expiration_max_pain":165,"net_gamma_exposure":-240987.48963937795,"net_gamma_exposure_per_100k_open_interest":-4572817.6402159,"gamma_exposure_flip":194.12887096438686,"gamma_exposure_flip_distance_pct":20.38999749729418,"call_wall":165,"call_wall_distance_pct":2.3255813953488373,"put_wall":140,"put_wall_distance_pct":-13.178294573643413,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":2405},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":161.25,"totalOi":7859,"analysisCoverage":1,"avgIvPct":317.2,"ivRank":100,"iv52wHighPct":317.2,"iv52wLowPct":49.6,"frontDte":35,"termPremiumPp":4.914,"riskReversalFrontPp":2.31,"riskReversal30dPp":2.31,"butterflyFrontPp":-0.6,"butterfly30dPp":-0.6,"putCallOiRatio":1.445,"putCallOiFrontRatio":3.657,"putCallVolumeFrontRatio":1.019,"optionVolume":980,"volumeOiRatio":0.124698,"netDeltaNormalized":-0.04992,"dealerDeltaNormalized":0.045323,"gexPer100kOi":-5241631.123553,"vannaPer100kOi":2557.5773,"charmPer100kOi":91665.606311,"weekendDeltaShiftPer100kOi":274996.818934,"ivSurfaceRangePp":41.7,"gammaFlipDistancePct":null,"maxPainDistancePct":-0.775194,"peakCallDistancePct":24.031008,"peakPutDistancePct":-19.379845},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/EFX.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."}