{"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/DUOL","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/DUOL.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/DUOL.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":"DUOL","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":141.75999450683594,"previous_close":148.92999267578125,"delta_neutral":133.8530448023131,"gamma_neutral":132.6568982721938,"gamma_max":164.11289765590408,"total_open_interest":67925,"previous_open_interest":72246,"listed_contracts":654,"listed_calls":386,"listed_puts":324,"gamma_max_distance_pct":15.768132064924876,"delta_neutral_distance_pct":-5.577701757135407,"gamma_neutral_distance_pct":-6.421484612997184,"open_interest_change_1d_pct":-5.980953962849155,"call_open_interest":43626,"put_open_interest":24299,"put_call_open_interest_ratio":0.5569843671205245,"nearest_expiration_max_pain":142,"nearest_expiration_max_pain_expiry":"2026-10-23","nearest_expiration_max_pain_distance_pct":0.1693041072687746,"all_expiration_max_pain":130,"net_gamma_exposure":670326.1118515092,"net_gamma_exposure_per_100k_open_interest":986862.1447942719,"gamma_exposure_flip":132.6568982721938,"gamma_exposure_flip_distance_pct":-6.421484612997184,"call_wall":150,"call_wall_distance_pct":5.812645183734621,"put_wall":140,"put_wall_distance_pct":-1.241531161847687,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":777},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":141.76,"totalOi":74620,"analysisCoverage":1,"avgIvPct":165.9,"ivRank":92.4,"iv52wHighPct":173.9,"iv52wLowPct":68.9,"frontDte":7,"termPremiumPp":-5.1751,"riskReversalFrontPp":15.44,"riskReversal30dPp":-1.46,"butterflyFrontPp":-0.98,"butterfly30dPp":5.37,"putCallOiRatio":0.583,"putCallOiFrontRatio":0.68,"putCallVolumeFrontRatio":1.331,"optionVolume":3719,"volumeOiRatio":0.049839,"netDeltaNormalized":0.102368,"dealerDeltaNormalized":-0.10232,"gexPer100kOi":1138603.564728,"vannaPer100kOi":1456.714018,"charmPer100kOi":-424955.775931,"weekendDeltaShiftPer100kOi":-1274867.327794,"ivSurfaceRangePp":82.8,"gammaFlipDistancePct":33.112302,"maxPainDistancePct":-4.768623,"peakCallDistancePct":4.401806,"peakPutDistancePct":-18.876975},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/DUOL.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."}