{"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/GVA","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/GVA.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/GVA.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":"GVA","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":109.69999694824219,"previous_close":108.77999877929688,"delta_neutral":94.28129431833884,"gamma_neutral":17.99329222195093,"gamma_max":119.99263332885361,"total_open_interest":643,"previous_open_interest":943,"listed_contracts":70,"listed_calls":47,"listed_puts":27,"gamma_max_distance_pct":9.38253114580087,"delta_neutral_distance_pct":-14.055335513981907,"gamma_neutral_distance_pct":-83.59772769142339,"open_interest_change_1d_pct":-31.81336161187699,"call_open_interest":550,"put_open_interest":93,"put_call_open_interest_ratio":0.1690909090909091,"nearest_expiration_max_pain":100,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":-8.842294638183779,"all_expiration_max_pain":100,"net_gamma_exposure":46022.922223188674,"net_gamma_exposure_per_100k_open_interest":7157530.672346606,"gamma_exposure_flip":17.99329222195093,"gamma_exposure_flip_distance_pct":-83.59772769142339,"call_wall":125,"call_wall_distance_pct":13.947131702270276,"put_wall":100,"put_wall_distance_pct":-8.842294638183779,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":3797},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":0.8889,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":109.7,"totalOi":955,"analysisCoverage":0.8889,"avgIvPct":165.8,"ivRank":89.6,"iv52wHighPct":180.3,"iv52wLowPct":41.5,"frontDte":35,"termPremiumPp":5.7614,"riskReversalFrontPp":null,"riskReversal30dPp":null,"butterflyFrontPp":null,"butterfly30dPp":null,"putCallOiRatio":0.163,"putCallOiFrontRatio":0.203,"putCallVolumeFrontRatio":0.5,"optionVolume":51,"volumeOiRatio":0.053403,"netDeltaNormalized":0.157043,"dealerDeltaNormalized":-0.148482,"gexPer100kOi":11791319.371728,"vannaPer100kOi":1465.968586,"charmPer100kOi":-68691.099476,"weekendDeltaShiftPer100kOi":-206073.298429,"ivSurfaceRangePp":19.7,"gammaFlipDistancePct":2.5433,"maxPainDistancePct":0.273473,"peakCallDistancePct":9.389243,"peakPutDistancePct":0.273473},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/GVA.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":[],"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."}