{"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/SM","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/SM.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/SM.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":"SM","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":39.5,"previous_close":37.52000045776367,"delta_neutral":32.228823179230446,"gamma_neutral":28.243830011871474,"gamma_max":40.220305693590895,"total_open_interest":52768,"previous_open_interest":60433,"listed_contracts":127,"listed_calls":95,"listed_puts":76,"gamma_max_distance_pct":1.8235587179516324,"delta_neutral_distance_pct":-18.40804258422672,"gamma_neutral_distance_pct":-28.49663288133804,"open_interest_change_1d_pct":-12.683467641851307,"call_open_interest":36737,"put_open_interest":16031,"put_call_open_interest_ratio":0.4363720499768626,"nearest_expiration_max_pain":35,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":-11.39240506329114,"all_expiration_max_pain":27.5,"net_gamma_exposure":2286231.8078791103,"net_gamma_exposure_per_100k_open_interest":4332610.309049253,"gamma_exposure_flip":28.243830011871474,"gamma_exposure_flip_distance_pct":-28.49663288133804,"call_wall":40,"call_wall_distance_pct":1.2658227848101267,"put_wall":30,"put_wall_distance_pct":-24.050632911392405,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":911},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":39.5,"totalOi":60629,"analysisCoverage":1,"avgIvPct":189.8,"ivRank":79.6,"iv52wHighPct":222.9,"iv52wLowPct":61,"frontDte":35,"termPremiumPp":2.1771,"riskReversalFrontPp":7.38,"riskReversal30dPp":7.38,"butterflyFrontPp":1.14,"butterfly30dPp":1.14,"putCallOiRatio":0.459,"putCallOiFrontRatio":0.563,"putCallVolumeFrontRatio":1.27,"optionVolume":2683,"volumeOiRatio":0.044253,"netDeltaNormalized":0.27299,"dealerDeltaNormalized":-0.214398,"gexPer100kOi":3678749.377361,"vannaPer100kOi":783.453463,"charmPer100kOi":-122586.55099,"weekendDeltaShiftPer100kOi":-367759.652971,"ivSurfaceRangePp":20.2,"gammaFlipDistancePct":-8.658228,"maxPainDistancePct":-24.050633,"peakCallDistancePct":-5.063291,"peakPutDistancePct":-17.721519},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/SM.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."}