{"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/HCA","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/HCA.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/HCA.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":"HCA","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":458.8399963378906,"previous_close":468.5,"delta_neutral":434.25998043628255,"gamma_neutral":440.46104748446396,"gamma_max":518.020472466785,"total_open_interest":29709,"previous_open_interest":39264,"listed_contracts":475,"listed_calls":315,"listed_puts":240,"gamma_max_distance_pct":12.897846003231543,"delta_neutral_distance_pct":-5.356990693441491,"gamma_neutral_distance_pct":-4.005524583757596,"open_interest_change_1d_pct":-24.335268948655255,"call_open_interest":16130,"put_open_interest":13579,"put_call_open_interest_ratio":0.841847489150651,"nearest_expiration_max_pain":450,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":-1.9265967240093944,"all_expiration_max_pain":440,"net_gamma_exposure":564031.2853661277,"net_gamma_exposure_per_100k_open_interest":1898519.9278539422,"gamma_exposure_flip":440.46104748446396,"gamma_exposure_flip_distance_pct":-4.005524583757596,"call_wall":480,"call_wall_distance_pct":4.611630161056646,"put_wall":440,"put_wall_distance_pct":-4.106005685698074,"gamma_max_cross_direction":"below","delta_neutral_cross_direction":null,"open_interest_rank":1220},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":458.84,"totalOi":40177,"analysisCoverage":1,"avgIvPct":152,"ivRank":85.3,"iv52wHighPct":172.1,"iv52wLowPct":35.1,"frontDte":35,"termPremiumPp":4.3493,"riskReversalFrontPp":3.7,"riskReversal30dPp":3.7,"butterflyFrontPp":0.21,"butterfly30dPp":0.21,"putCallOiRatio":0.969,"putCallOiFrontRatio":1.905,"putCallVolumeFrontRatio":1.452,"optionVolume":1599,"volumeOiRatio":0.039799,"netDeltaNormalized":0.079146,"dealerDeltaNormalized":-0.070841,"gexPer100kOi":41307450.008711,"vannaPer100kOi":2118.127287,"charmPer100kOi":57485.626104,"weekendDeltaShiftPer100kOi":172459.3673,"ivSurfaceRangePp":40,"gammaFlipDistancePct":-0.006538,"maxPainDistancePct":-5.195711,"peakCallDistancePct":0.252811,"peakPutDistancePct":-1.926598},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/HCA.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."}