{"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/IGV","markdown_url":"https://halfonadouble.com/stock/IGV.md","history_url":"https://halfonadouble.com/api/v1/history/IGV.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/IGV.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":"IGV","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":108.43000030517578,"previous_close":108.2300033569336,"delta_neutral":104.48108228843029,"gamma_neutral":110.315625156803,"gamma_max":117.7462369874733,"total_open_interest":1342661,"previous_open_interest":1383027,"listed_contracts":1097,"listed_calls":703,"listed_puts":608,"gamma_max_distance_pct":8.591936416192018,"delta_neutral_distance_pct":-3.641905381934226,"gamma_neutral_distance_pct":1.7390250358020196,"open_interest_change_1d_pct":-2.9186704236432113,"call_open_interest":402113,"put_open_interest":940548,"put_call_open_interest_ratio":2.339014157711887,"nearest_expiration_max_pain":105,"nearest_expiration_max_pain_expiry":"2026-10-09","nearest_expiration_max_pain_distance_pct":-3.1633314539537576,"all_expiration_max_pain":100,"net_gamma_exposure":-13456751.409181247,"net_gamma_exposure_per_100k_open_interest":-1002244.9009229616,"gamma_exposure_flip":110.315625156803,"gamma_exposure_flip_distance_pct":1.7390250358020196,"call_wall":110,"call_wall_distance_pct":1.447938476810349,"put_wall":103,"put_wall_distance_pct":-5.007839426259401,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":77},"history_summary":{"first_date":"2020-12-01","last_date":"2026-10-02","session_count":1378,"trailing_window_sessions":252,"sessions_above_gamma_max_pct":0.7936507936507936,"gamma_max_cross_count":4,"delta_neutral_cross_count":28,"gamma_max_prior_sessions_closer_pct":38.492063492063494,"gamma_max_prior_comparison_sessions":252,"delta_neutral_prior_sessions_closer_pct":58.730158730158735,"delta_neutral_prior_comparison_sessions":252,"open_interest_percentile_1y":58.730158730158735,"open_interest_change_1d_contracts":-40366,"open_interest_change_z_252":-0.5329490346933526,"open_interest_change_z_comparison_sessions":252,"open_interest_change_5_sessions_pct":-1.311136575624091,"open_interest_change_21_sessions_pct":-1.6065702074771506,"call_put_open_interest_changes":{"one_session":{"call_change_contracts":-11310,"put_change_contracts":-29056,"call_growth_pct":-2.7356968528601455,"put_growth_pct":-2.9966873073955966,"call_minus_put_growth_pp":0.2609904545354511},"five_sessions":{"call_change_contracts":2536,"put_change_contracts":-20374,"call_growth_pct":0.6346711647567302,"put_growth_pct":-2.120255338102364,"call_minus_put_growth_pp":2.754926502859094},"call_change_surprise":{"z_score":-0.26007003236750253,"comparison_sessions":252},"put_change_surprise":{"z_score":-0.7411762001515197,"comparison_sessions":252},"call_minus_put_growth_surprise":{"z_score":0.01703646506456907,"comparison_sessions":252}}},"advanced_options":{"data_through":"2026-10-02","analysis_coverage":1,"catalyst_score":45.489791012681536,"directional_score":-38.1496062992126,"catalyst_reasons":["front IV premium -0.2 pp"],"features":{"symbol":"IGV","price":108.43,"totalOi":1392119,"analysisCoverage":1,"avgIvPct":82.4,"ivRank":41.5,"iv52wHighPct":155.1,"iv52wLowPct":30.9,"frontDte":7,"frontAtmIvPct":30.9059,"backAtmIvPct":31.0865,"termPremiumPp":-0.1806,"expectedMoveFrontPct":4.28,"straddleFrontPct":3.14,"straddle30dPct":6.82,"riskReversalFrontPp":3.67,"riskReversal30dPp":4.15,"butterflyFrontPp":0.96,"butterfly30dPp":-1.54,"putCallOiRatio":2.329,"putCallOiFrontRatio":0.682,"putCallVolumeFrontRatio":0.499,"optionVolume":44808,"volumeOiRatio":0.032187,"netDeltaNormalized":0.088455,"dealerDeltaNormalized":-0.087898,"gexPer100kOi":-1031500.328636,"vannaPer100kOi":3412.136462,"charmPer100kOi":-343170.878352,"weekendDeltaShiftPer100kOi":-1029512.635055,"ivSurfaceRangePp":130.3,"gammaFlipDistancePct":-58.609241,"maxPainDistancePct":-7.774601,"peakCallDistancePct":-3.163331,"peakPutDistancePct":-16.997141},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/IGV.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":[{"direction":"above","event_count":18,"completed_path_count":18,"latest_cross_date":"2026-06-01","horizons":[{"sessions":1,"sample_size":18,"median_return_pct":-0.07233955387990765,"p25_return_pct":-1.0572380157618384,"p75_return_pct":0.9213429486987668,"above_zero_pct":50,"median_interval_low_pct":-0.9643217703006912,"median_interval_high_pct":0.7606887484613356,"median_interval_nominal_coverage_pct":90.374755859375,"confidence_floor_pct":0},{"sessions":3,"sample_size":18,"median_return_pct":-0.975800266376875,"p25_return_pct":-2.0584676420337953,"p75_return_pct":1.7264196360830875,"above_zero_pct":38.88888888888889,"median_interval_low_pct":-1.9202772689238645,"median_interval_high_pct":1.403870812857111,"median_interval_nominal_coverage_pct":90.374755859375,"confidence_floor_pct":0},{"sessions":5,"sample_size":18,"median_return_pct":-0.02668569443938784,"p25_return_pct":-2.8798407952890406,"p75_return_pct":2.5004147575678424,"above_zero_pct":50,"median_interval_low_pct":-1.8747703040460917,"median_interval_high_pct":2.1997751806398735,"median_interval_nominal_coverage_pct":90.374755859375,"confidence_floor_pct":0},{"sessions":10,"sample_size":18,"median_return_pct":-0.35165200096075044,"p25_return_pct":-3.153847919798558,"p75_return_pct":4.300015234104321,"above_zero_pct":50,"median_interval_low_pct":-2.9044287119789347,"median_interval_high_pct":3.6560661394758664,"median_interval_nominal_coverage_pct":90.374755859375,"confidence_floor_pct":0}]},{"direction":"below","event_count":16,"completed_path_count":16,"latest_cross_date":"2026-06-02","horizons":[{"sessions":1,"sample_size":16,"median_return_pct":-1.1599677139512654,"p25_return_pct":-2.022352730490412,"p75_return_pct":-0.1892333977275229,"above_zero_pct":25,"median_interval_low_pct":-1.971400964525738,"median_interval_high_pct":-0.4652172495467344,"median_interval_nominal_coverage_pct":92.3187255859375,"confidence_floor_pct":-0.4652172495467344},{"sessions":3,"sample_size":16,"median_return_pct":-0.28106535965385926,"p25_return_pct":-2.1709558968992764,"p75_return_pct":1.2546232741571683,"above_zero_pct":31.25,"median_interval_low_pct":-2.163760383367197,"median_interval_high_pct":1.2373516086167324,"median_interval_nominal_coverage_pct":92.3187255859375,"confidence_floor_pct":0},{"sessions":5,"sample_size":16,"median_return_pct":-1.671018299173943,"p25_return_pct":-3.723835981640905,"p75_return_pct":0.1702331776484295,"above_zero_pct":25,"median_interval_low_pct":-3.6993168255764153,"median_interval_high_pct":-0.21485085124973713,"median_interval_nominal_coverage_pct":92.3187255859375,"confidence_floor_pct":-0.21485085124973713},{"sessions":10,"sample_size":16,"median_return_pct":-1.1769837042315268,"p25_return_pct":-4.255303522243989,"p75_return_pct":1.4412089722819155,"above_zero_pct":37.5,"median_interval_low_pct":-3.9703245786684382,"median_interval_high_pct":1.3950877177931087,"median_interval_nominal_coverage_pct":92.3187255859375,"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."}