{"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/HAL","markdown_url":"https://halfonadouble.com/stock/HAL.md","history_url":"https://halfonadouble.com/api/v1/history/HAL.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/HAL.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":"HAL","page_tier":"A","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":33.5,"previous_close":32.88999938964844,"delta_neutral":31.38540109458999,"gamma_neutral":28.040270447609565,"gamma_max":36.00691833054186,"total_open_interest":379147,"previous_open_interest":449932,"listed_contracts":403,"listed_calls":240,"listed_puts":192,"gamma_max_distance_pct":7.483338300124948,"delta_neutral_distance_pct":-6.31223553853734,"gamma_neutral_distance_pct":-16.297700156389357,"open_interest_change_1d_pct":-15.732377337019814,"call_open_interest":223609,"put_open_interest":155538,"put_call_open_interest_ratio":0.6955802315649191,"nearest_expiration_max_pain":32,"nearest_expiration_max_pain_expiry":"2026-10-23","nearest_expiration_max_pain_distance_pct":-4.477611940298507,"all_expiration_max_pain":32,"net_gamma_exposure":20045537.302343965,"net_gamma_exposure_per_100k_open_interest":5287009.340003736,"gamma_exposure_flip":28.040270447609565,"gamma_exposure_flip_distance_pct":-16.297700156389357,"call_wall":37,"call_wall_distance_pct":10.44776119402985,"put_wall":35,"put_wall_distance_pct":4.477611940298507,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":244},"history_summary":{"first_date":"2020-12-01","last_date":"2026-10-16","session_count":1404,"trailing_window_sessions":252,"sessions_above_gamma_max_pct":5.158730158730158,"gamma_max_cross_count":16,"delta_neutral_cross_count":11,"gamma_max_prior_sessions_closer_pct":65.87301587301587,"gamma_max_prior_comparison_sessions":252,"delta_neutral_prior_sessions_closer_pct":34.92063492063492,"delta_neutral_prior_comparison_sessions":252,"open_interest_percentile_1y":0.3968253968253968,"open_interest_change_1d_contracts":-70785,"open_interest_change_z_252":-2.2977958773016396,"open_interest_change_z_comparison_sessions":252,"open_interest_change_5_sessions_pct":-13.77574922337295,"open_interest_change_21_sessions_pct":-31.13054692750622,"call_put_open_interest_changes":{"one_session":{"call_change_contracts":-53985,"put_change_contracts":-16800,"call_growth_pct":-19.447466443799215,"put_growth_pct":-9.748285346238205,"call_minus_put_growth_pp":-9.69918109756101},"five_sessions":{"call_change_contracts":-48330,"put_change_contracts":-12245,"call_growth_pct":-17.77236806783874,"put_growth_pct":-7.29811721092125,"call_minus_put_growth_pp":-10.474250856917491},"call_change_surprise":{"z_score":-3.3230910038365824,"comparison_sessions":252},"put_change_surprise":{"z_score":-1.0411833238212405,"comparison_sessions":252},"call_minus_put_growth_surprise":{"z_score":-3.306143861084223,"comparison_sessions":252}}},"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":57.14274806043385,"directional_score":13.113815030452631,"catalyst_reasons":["front IV premium 18.4 pp"],"features":{"price":33.5,"totalOi":452487,"analysisCoverage":1,"avgIvPct":228.1,"ivRank":92.8,"iv52wHighPct":241.5,"iv52wLowPct":56.6,"frontDte":7,"termPremiumPp":18.4376,"riskReversalFrontPp":-3.64,"riskReversal30dPp":180.47,"butterflyFrontPp":1.17,"butterfly30dPp":-1.77,"putCallOiRatio":0.622,"putCallOiFrontRatio":0.77,"putCallVolumeFrontRatio":0.629,"optionVolume":11013,"volumeOiRatio":0.024339,"netDeltaNormalized":0.121444,"dealerDeltaNormalized":-0.118537,"gexPer100kOi":1931004.800138,"vannaPer100kOi":3337.77545,"charmPer100kOi":-170615.951397,"weekendDeltaShiftPer100kOi":-511848.075193,"ivSurfaceRangePp":253.1,"gammaFlipDistancePct":3.134328,"maxPainDistancePct":-1.492537,"peakCallDistancePct":4.477612,"peakPutDistancePct":-55.223881},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/HAL.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":[{"direction":"above","event_count":24,"completed_path_count":24,"latest_cross_date":"2026-09-04","horizons":[{"sessions":1,"sample_size":24,"median_return_pct":-0.8366955405952614,"p25_return_pct":-1.843350107942607,"p75_return_pct":0.2692179940029238,"above_zero_pct":29.166666666666668,"median_interval_low_pct":-1.4229272850362795,"median_interval_high_pct":-0.3047376197379936,"median_interval_nominal_coverage_pct":93.60853433609009,"confidence_floor_pct":-0.3047376197379936},{"sessions":3,"sample_size":24,"median_return_pct":-0.007657525541704402,"p25_return_pct":-2.3286686061711137,"p75_return_pct":3.2271399611159604,"above_zero_pct":50,"median_interval_low_pct":-2.13464878790971,"median_interval_high_pct":2.3200949489088574,"median_interval_nominal_coverage_pct":93.60853433609009,"confidence_floor_pct":0},{"sessions":5,"sample_size":24,"median_return_pct":-0.04701813193692117,"p25_return_pct":-4.334024858689634,"p75_return_pct":2.7780859458339577,"above_zero_pct":45.83333333333333,"median_interval_low_pct":-3.758956202336916,"median_interval_high_pct":2.2177466182630834,"median_interval_nominal_coverage_pct":93.60853433609009,"confidence_floor_pct":0},{"sessions":10,"sample_size":24,"median_return_pct":-0.3408178573619025,"p25_return_pct":-5.792767187831946,"p75_return_pct":3.8162027620499472,"above_zero_pct":50,"median_interval_low_pct":-5.109490010860906,"median_interval_high_pct":3.3576979515912653,"median_interval_nominal_coverage_pct":93.60853433609009,"confidence_floor_pct":0}]},{"direction":"below","event_count":25,"completed_path_count":25,"latest_cross_date":"2026-09-10","horizons":[{"sessions":1,"sample_size":25,"median_return_pct":0.49443709639773736,"p25_return_pct":-0.5899737605303157,"p75_return_pct":2.098817335471592,"above_zero_pct":56.00000000000001,"median_interval_low_pct":-0.43807490114600167,"median_interval_high_pct":1.7077057186825728,"median_interval_nominal_coverage_pct":95.67147493362427,"confidence_floor_pct":0},{"sessions":3,"sample_size":25,"median_return_pct":1.611166669079589,"p25_return_pct":-0.4290690358912941,"p75_return_pct":3.5632232921035456,"above_zero_pct":64,"median_interval_low_pct":-0.18785651937305303,"median_interval_high_pct":3.502826108852064,"median_interval_nominal_coverage_pct":95.67147493362427,"confidence_floor_pct":0},{"sessions":5,"sample_size":25,"median_return_pct":-1.1897340693843739,"p25_return_pct":-2.5564486223895733,"p75_return_pct":5.773599387124273,"above_zero_pct":44,"median_interval_low_pct":-2.4110222414149285,"median_interval_high_pct":5.341106777533722,"median_interval_nominal_coverage_pct":95.67147493362427,"confidence_floor_pct":0},{"sessions":10,"sample_size":25,"median_return_pct":0.5911371612976168,"p25_return_pct":-4.920049015808148,"p75_return_pct":7.76078124149453,"above_zero_pct":56.00000000000001,"median_interval_low_pct":-4.457463257302708,"median_interval_high_pct":7.047727111552371,"median_interval_nominal_coverage_pct":95.67147493362427,"confidence_floor_pct":0}]}],"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."}