{"schema_version":1,"publisher":"Half on a Double","data_through":"2026-10-02","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=2026-10-02","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":426.69000244140625,"previous_close":423.3900146484375,"delta_neutral":417.4541559142948,"gamma_neutral":422.50363058594513,"gamma_max":466.4702022296044,"total_open_interest":33656,"previous_open_interest":33965,"listed_contracts":537,"listed_calls":342,"listed_puts":266,"gamma_max_distance_pct":9.322974421848762,"delta_neutral_distance_pct":-2.164533144499848,"gamma_neutral_distance_pct":-0.981127242613564,"open_interest_change_1d_pct":-0.9097600471073164,"call_open_interest":18123,"put_open_interest":15533,"put_call_open_interest_ratio":0.8570876786404017,"nearest_expiration_max_pain":425,"nearest_expiration_max_pain_expiry":"2026-10-16","nearest_expiration_max_pain_distance_pct":-0.3960726597146658,"all_expiration_max_pain":420,"net_gamma_exposure":349147.33077213727,"net_gamma_exposure_per_100k_open_interest":1037399.9606968662,"gamma_exposure_flip":422.50363058594513,"gamma_exposure_flip_distance_pct":-0.981127242613564,"call_wall":440,"call_wall_distance_pct":3.1193600699424637,"put_wall":430,"put_wall_distance_pct":0.775738250171044,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":1220},"history_summary":null,"advanced_options":{"data_through":"2026-10-02","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"symbol":"HCA","price":426.69,"totalOi":33656,"analysisCoverage":1,"avgIvPct":39.6,"ivRank":15.9,"iv52wHighPct":63.43,"iv52wLowPct":35.1,"frontDte":14,"frontAtmIvPct":30.7893,"backAtmIvPct":36.5178,"termPremiumPp":-5.7285,"expectedMoveFrontPct":6.03,"straddleFrontPct":4.71,"straddle30dPct":4.71,"riskReversalFrontPp":3.74,"riskReversal30dPp":3.74,"butterflyFrontPp":-0.66,"butterfly30dPp":-0.66,"putCallOiRatio":0.857,"putCallOiFrontRatio":1.264,"putCallVolumeFrontRatio":0.429,"optionVolume":350,"volumeOiRatio":0.010399,"netDeltaNormalized":0.097433,"dealerDeltaNormalized":-0.097151,"gexPer100kOi":6013658.693844,"vannaPer100kOi":3229.736154,"charmPer100kOi":-466561.682909,"weekendDeltaShiftPer100kOi":-1399682.07749,"ivSurfaceRangePp":104.8,"gammaFlipDistancePct":-27.907849,"maxPainDistancePct":-1.567883,"peakCallDistancePct":6.634793,"peakPutDistancePct":-10.94237},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/HCA.json?date=2026-10-02","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."}