{"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/AAPL","markdown_url":"https://halfonadouble.com/stock/AAPL.md","history_url":"https://halfonadouble.com/api/v1/history/AAPL.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/AAPL.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":"AAPL","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":343.4599914550781,"previous_close":342,"delta_neutral":310.4519931712822,"gamma_neutral":309.76563958882406,"gamma_max":356.7051939867367,"total_open_interest":4386792,"previous_open_interest":5093250,"listed_contracts":2080,"listed_calls":1480,"listed_puts":1212,"gamma_max_distance_pct":3.8564033253319745,"delta_neutral_distance_pct":-9.610434724567654,"gamma_neutral_distance_pct":-9.810269814398753,"open_interest_change_1d_pct":-13.870475629509645,"call_open_interest":2432472,"put_open_interest":1954320,"put_call_open_interest_ratio":0.8034295975452133,"nearest_expiration_max_pain":342.5,"nearest_expiration_max_pain_expiry":"2026-10-19","nearest_expiration_max_pain_distance_pct":-0.27950604989276734,"all_expiration_max_pain":300,"net_gamma_exposure":238021322.53311294,"net_gamma_exposure_per_100k_open_interest":5425862.966220257,"gamma_exposure_flip":309.76563958882406,"gamma_exposure_flip_distance_pct":-9.810269814398753,"call_wall":350,"call_wall_distance_pct":1.904154401569435,"put_wall":340,"put_wall_distance_pct":-1.0073928670468346,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":18},"history_summary":{"first_date":"2020-12-01","last_date":"2026-10-16","session_count":1404,"trailing_window_sessions":252,"sessions_above_gamma_max_pct":0.7936507936507936,"gamma_max_cross_count":2,"delta_neutral_cross_count":0,"gamma_max_prior_sessions_closer_pct":50.79365079365079,"gamma_max_prior_comparison_sessions":252,"delta_neutral_prior_sessions_closer_pct":58.333333333333336,"delta_neutral_prior_comparison_sessions":252,"open_interest_percentile_1y":19.841269841269842,"open_interest_change_1d_contracts":-706458,"open_interest_change_z_252":-2.948989313813962,"open_interest_change_z_comparison_sessions":252,"open_interest_change_5_sessions_pct":-6.6716648377388585,"open_interest_change_21_sessions_pct":-16.060604553033574,"call_put_open_interest_changes":{"one_session":{"call_change_contracts":-414049,"put_change_contracts":-292409,"call_growth_pct":-14.545791160507862,"put_growth_pct":-13.01487629349156,"call_minus_put_growth_pp":-1.5309148670163033},"five_sessions":{"call_change_contracts":-240731,"put_change_contracts":-72863,"call_growth_pct":-9.005339287738343,"put_growth_pct":-3.5942980974090646,"call_minus_put_growth_pp":-5.4110411903292785},"call_change_surprise":{"z_score":-2.8774806803373765,"comparison_sessions":252},"put_change_surprise":{"z_score":-2.9414367892764246,"comparison_sessions":252},"call_minus_put_growth_surprise":{"z_score":-0.8677475175553652,"comparison_sessions":252}}},"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":45.57351711169667,"directional_score":-10.109736792680636,"catalyst_reasons":["volume/OI 0.40","smile convexity 9.3 pp"],"features":{"price":343.46,"totalOi":5214185,"analysisCoverage":1,"avgIvPct":78.6,"ivRank":25.1,"iv52wHighPct":200,"iv52wLowPct":38,"frontDte":3,"termPremiumPp":1.3454,"riskReversalFrontPp":3.26,"riskReversal30dPp":5.98,"butterflyFrontPp":9.31,"butterfly30dPp":-0.75,"putCallOiRatio":0.813,"putCallOiFrontRatio":0.907,"putCallVolumeFrontRatio":0.906,"optionVolume":2085678,"volumeOiRatio":0.400001,"netDeltaNormalized":0.200298,"dealerDeltaNormalized":-0.192336,"gexPer100kOi":26626702.257975,"vannaPer100kOi":1343.047859,"charmPer100kOi":-837874.816486,"weekendDeltaShiftPer100kOi":-2513624.43028,"ivSurfaceRangePp":143.8,"gammaFlipDistancePct":-1.481978,"maxPainDistancePct":-11.197811,"peakCallDistancePct":0.448378,"peakPutDistancePct":-1.007395},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/AAPL.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":12,"completed_path_count":12,"latest_cross_date":"2026-07-15","horizons":[{"sessions":1,"sample_size":12,"median_return_pct":0.20506775492822316,"p25_return_pct":-0.6005729236174345,"p75_return_pct":1.629931313747346,"above_zero_pct":58.333333333333336,"median_interval_low_pct":-0.6443275472520216,"median_interval_high_pct":1.6976043690765552,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":3,"sample_size":12,"median_return_pct":0.11245767700213682,"p25_return_pct":-1.4802101014727036,"p75_return_pct":2.5381736153521297,"above_zero_pct":50,"median_interval_low_pct":-2.614586139709363,"median_interval_high_pct":3.122117249442935,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":5,"sample_size":12,"median_return_pct":-0.16543060888301042,"p25_return_pct":-1.1321396259604655,"p75_return_pct":1.7109172199403277,"above_zero_pct":50,"median_interval_low_pct":-2.5142475048323787,"median_interval_high_pct":2.6580540713778023,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":10,"sample_size":12,"median_return_pct":0.8512098261478918,"p25_return_pct":-0.0033251226020658553,"p75_return_pct":2.7020768394356134,"above_zero_pct":75,"median_interval_low_pct":-0.7279395498356545,"median_interval_high_pct":3.2641228828721447,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0}]},{"direction":"below","event_count":12,"completed_path_count":12,"latest_cross_date":"2026-07-17","horizons":[{"sessions":1,"sample_size":12,"median_return_pct":-0.359853791011866,"p25_return_pct":-0.9548225664646248,"p75_return_pct":0.4390726023324687,"above_zero_pct":50,"median_interval_low_pct":-1.3195907278142571,"median_interval_high_pct":0.7712236217600754,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":3,"sample_size":12,"median_return_pct":-0.16001449872046214,"p25_return_pct":-1.671978196453433,"p75_return_pct":1.262485124937951,"above_zero_pct":50,"median_interval_low_pct":-1.980204209373082,"median_interval_high_pct":1.675505308884473,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":5,"sample_size":12,"median_return_pct":-0.05723642954112429,"p25_return_pct":-1.7007072907253478,"p75_return_pct":0.987237108553346,"above_zero_pct":50,"median_interval_low_pct":-3.408447311899654,"median_interval_high_pct":1.3210107199512544,"median_interval_nominal_coverage_pct":96.142578125,"confidence_floor_pct":0},{"sessions":10,"sample_size":12,"median_return_pct":0.9142998212162023,"p25_return_pct":-1.7239606319695844,"p75_return_pct":2.606763034423032,"above_zero_pct":66.66666666666666,"median_interval_low_pct":-1.9127131058799485,"median_interval_high_pct":2.971039664772346,"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."}