{"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/MASS","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/MASS.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/MASS.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":"MASS","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":11.260000228881836,"previous_close":11.890000343322754,"delta_neutral":null,"gamma_neutral":null,"gamma_max":null,"total_open_interest":1186,"previous_open_interest":1771,"listed_contracts":16,"listed_calls":16,"listed_puts":6,"gamma_max_distance_pct":null,"delta_neutral_distance_pct":null,"gamma_neutral_distance_pct":null,"open_interest_change_1d_pct":-33.03218520609825,"call_open_interest":421,"put_open_interest":765,"put_call_open_interest_ratio":1.817102137767221,"nearest_expiration_max_pain":12.5,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":11.012431135992092,"all_expiration_max_pain":12.5,"net_gamma_exposure":-57779.41565713664,"net_gamma_exposure_per_100k_open_interest":-4871788.84124255,"gamma_exposure_flip":null,"gamma_exposure_flip_distance_pct":null,"call_wall":12.5,"call_wall_distance_pct":11.012431135992092,"put_wall":12.5,"put_wall_distance_pct":11.012431135992092,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":3423},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":0.7778,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":11.26,"totalOi":1771,"analysisCoverage":0.7778,"avgIvPct":1505.7,"ivRank":100,"iv52wHighPct":1505.7,"iv52wLowPct":84.7,"frontDte":null,"termPremiumPp":null,"riskReversalFrontPp":-64.6,"riskReversal30dPp":-64.6,"butterflyFrontPp":null,"butterfly30dPp":null,"putCallOiRatio":0.794,"putCallOiFrontRatio":3.82,"putCallVolumeFrontRatio":0,"optionVolume":11,"volumeOiRatio":0.006211,"netDeltaNormalized":-0.027814,"dealerDeltaNormalized":0.027798,"gexPer100kOi":-335567.476002,"vannaPer100kOi":-2145.680407,"charmPer100kOi":-9881.422925,"weekendDeltaShiftPer100kOi":-29644.268775,"ivSurfaceRangePp":24.8,"gammaFlipDistancePct":null,"maxPainDistancePct":11.012433,"peakCallDistancePct":11.012433,"peakPutDistancePct":-11.190053},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/MASS.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."}