{"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/HE","markdown_url":"https://halfonadouble.com/stock/HE.md","history_url":"https://halfonadouble.com/api/v1/history/HE.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/HE.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":"HE","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":8.579999923706055,"previous_close":8.489999771118164,"delta_neutral":9.498626349168283,"gamma_neutral":10.724999904632568,"gamma_max":14.068962328518285,"total_open_interest":115216,"previous_open_interest":116322,"listed_contracts":60,"listed_calls":50,"listed_puts":21,"gamma_max_distance_pct":63.97392137086783,"delta_neutral_distance_pct":10.706601790567804,"gamma_neutral_distance_pct":25,"open_interest_change_1d_pct":-0.9508089613314764,"call_open_interest":88021,"put_open_interest":27195,"put_call_open_interest_ratio":0.3089603617318594,"nearest_expiration_max_pain":7.5,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":-12.587411810133888,"all_expiration_max_pain":10,"net_gamma_exposure":-1067306.041603852,"net_gamma_exposure_per_100k_open_interest":-926352.278853503,"gamma_exposure_flip":10.724999904632568,"gamma_exposure_flip_distance_pct":25,"call_wall":15,"call_wall_distance_pct":74.82517637973221,"put_wall":10,"put_wall_distance_pct":16.55011758648815,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":567},"history_summary":{"first_date":"2020-12-01","last_date":"2026-10-16","session_count":1404,"trailing_window_sessions":252,"sessions_above_gamma_max_pct":9.523809523809524,"gamma_max_cross_count":12,"delta_neutral_cross_count":19,"gamma_max_prior_sessions_closer_pct":98.01587301587301,"gamma_max_prior_comparison_sessions":252,"delta_neutral_prior_sessions_closer_pct":13.095238095238097,"delta_neutral_prior_comparison_sessions":252,"open_interest_percentile_1y":14.682539682539684,"open_interest_change_1d_contracts":-1106,"open_interest_change_z_252":-0.1666598814805037,"open_interest_change_z_comparison_sessions":252,"open_interest_change_5_sessions_pct":-0.4019674795342364,"open_interest_change_21_sessions_pct":1.7899107695026062,"call_put_open_interest_changes":{"one_session":{"call_change_contracts":-967,"put_change_contracts":-139,"call_growth_pct":-1.0866633703420685,"put_growth_pct":-0.5085241823370162,"call_minus_put_growth_pp":-0.5781391880050523},"five_sessions":{"call_change_contracts":-303,"put_change_contracts":-162,"call_growth_pct":-0.3430551152574612,"put_growth_pct":-0.5921701941002303,"call_minus_put_growth_pp":0.24911507884276912},"call_change_surprise":{"z_score":-0.2607411901290648,"comparison_sessions":252},"put_change_surprise":{"z_score":-0.04137729619193044,"comparison_sessions":252},"call_minus_put_growth_surprise":{"z_score":-0.04673930204648141,"comparison_sessions":252}}},"advanced_options":{"data_through":"2026-10-16","analysis_coverage":0.7778,"catalyst_score":37.65293606286075,"directional_score":0.17855705508303643,"catalyst_reasons":[],"features":{"price":8.58,"totalOi":116343,"analysisCoverage":0.7778,"avgIvPct":709.9,"ivRank":98.2,"iv52wHighPct":721.6,"iv52wLowPct":60.34,"frontDte":null,"termPremiumPp":null,"riskReversalFrontPp":8.71,"riskReversal30dPp":8.71,"butterflyFrontPp":null,"butterfly30dPp":null,"putCallOiRatio":0.306,"putCallOiFrontRatio":0.124,"putCallVolumeFrontRatio":0.55,"optionVolume":886,"volumeOiRatio":0.007615,"netDeltaNormalized":-0.059018,"dealerDeltaNormalized":0.058905,"gexPer100kOi":-61071.744755,"vannaPer100kOi":2355.964691,"charmPer100kOi":-3120.944105,"weekendDeltaShiftPer100kOi":-9362.832315,"ivSurfaceRangePp":11.4,"gammaFlipDistancePct":null,"maxPainDistancePct":16.550117,"peakCallDistancePct":-12.587413,"peakPutDistancePct":16.550117},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/HE.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":15,"completed_path_count":15,"latest_cross_date":"2026-04-10","horizons":[{"sessions":1,"sample_size":15,"median_return_pct":0.5069703742700327,"p25_return_pct":-2.4663767212437127,"p75_return_pct":1.8020502319237242,"above_zero_pct":66.66666666666666,"median_interval_low_pct":-2.491347137917743,"median_interval_high_pct":2.105974594557236,"median_interval_nominal_coverage_pct":96.484375,"confidence_floor_pct":0},{"sessions":3,"sample_size":15,"median_return_pct":0.7490629346451172,"p25_return_pct":-1.1549821717498576,"p75_return_pct":2.392275292354329,"above_zero_pct":53.333333333333336,"median_interval_low_pct":-1.5337424030768432,"median_interval_high_pct":2.6785759901514217,"median_interval_nominal_coverage_pct":96.484375,"confidence_floor_pct":0},{"sessions":5,"sample_size":15,"median_return_pct":0.5732493865049593,"p25_return_pct":-2.2720115438791377,"p75_return_pct":6.039702965002125,"above_zero_pct":53.333333333333336,"median_interval_low_pct":-2.4505116269621263,"median_interval_high_pct":6.127021148148781,"median_interval_nominal_coverage_pct":96.484375,"confidence_floor_pct":0},{"sessions":10,"sample_size":15,"median_return_pct":-1.2909644327768643,"p25_return_pct":-2.712746745634309,"p75_return_pct":5.587896133910563,"above_zero_pct":40,"median_interval_low_pct":-2.802545132030132,"median_interval_high_pct":6.0546865177457,"median_interval_nominal_coverage_pct":96.484375,"confidence_floor_pct":0}]},{"direction":"below","event_count":12,"completed_path_count":12,"latest_cross_date":"2026-04-17","horizons":[{"sessions":1,"sample_size":12,"median_return_pct":1.2363952041672066,"p25_return_pct":-0.0946072918824592,"p75_return_pct":3.6383051481113093,"above_zero_pct":66.66666666666666,"median_interval_low_pct":-0.3784291675298368,"median_interval_high_pct":4.4712569738702745,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":3,"sample_size":12,"median_return_pct":-0.7271640399013901,"p25_return_pct":-1.5251193043666151,"p75_return_pct":2.4567015718759744,"above_zero_pct":41.66666666666667,"median_interval_low_pct":-2.0813559101824586,"median_interval_high_pct":4.613198094329962,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":5,"sample_size":12,"median_return_pct":-2.2036214164196766,"p25_return_pct":-3.2485412019519684,"p75_return_pct":2.927020592925833,"above_zero_pct":41.66666666666667,"median_interval_low_pct":-3.3442075021029694,"median_interval_high_pct":4.055028594690846,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":10,"sample_size":12,"median_return_pct":-1.3900335156362187,"p25_return_pct":-3.2977285599485624,"p75_return_pct":3.2815179624159807,"above_zero_pct":41.66666666666667,"median_interval_low_pct":-3.311252960270139,"median_interval_high_pct":6.889762005689759,"median_interval_nominal_coverage_pct":96.142578125,"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."}