{"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/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=2026-10-02","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":12.6899995803833,"previous_close":12.510000228881836,"delta_neutral":null,"gamma_neutral":null,"gamma_max":null,"total_open_interest":1761,"previous_open_interest":1644,"listed_contracts":17,"listed_calls":18,"listed_puts":7,"gamma_max_distance_pct":null,"delta_neutral_distance_pct":null,"gamma_neutral_distance_pct":null,"open_interest_change_1d_pct":7.116788321167883,"call_open_interest":978,"put_open_interest":783,"put_call_open_interest_ratio":0.8006134969325154,"nearest_expiration_max_pain":10,"nearest_expiration_max_pain_expiry":"2026-10-16","nearest_expiration_max_pain_distance_pct":-21.197790932488346,"all_expiration_max_pain":12.5,"net_gamma_exposure":-87163.43571601507,"net_gamma_exposure_per_100k_open_interest":-4949655.634072406,"gamma_exposure_flip":null,"gamma_exposure_flip_distance_pct":null,"call_wall":12.5,"call_wall_distance_pct":-1.4972386656104353,"put_wall":12.5,"put_wall_distance_pct":-1.4972386656104353,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":3309},"history_summary":null,"advanced_options":{"data_through":"2026-10-02","analysis_coverage":0.9444,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"symbol":"MASS","price":12.69,"totalOi":1761,"analysisCoverage":0.9444,"avgIvPct":109.1,"ivRank":45.4,"iv52wHighPct":138.43,"iv52wLowPct":84.7,"frontDte":14,"frontAtmIvPct":70.2588,"backAtmIvPct":65.2571,"termPremiumPp":5.0017,"expectedMoveFrontPct":13.76,"straddleFrontPct":18.72,"straddle30dPct":18.72,"riskReversalFrontPp":-14.76,"riskReversal30dPp":-14.76,"butterflyFrontPp":null,"butterfly30dPp":null,"putCallOiRatio":0.801,"putCallOiFrontRatio":0.034,"putCallVolumeFrontRatio":0,"optionVolume":11,"volumeOiRatio":0.006246,"netDeltaNormalized":0.240029,"dealerDeltaNormalized":-0.237439,"gexPer100kOi":-257090.289608,"vannaPer100kOi":-1192.504259,"charmPer100kOi":-918114.707553,"weekendDeltaShiftPer100kOi":-2754344.122658,"ivSurfaceRangePp":98.4,"gammaFlipDistancePct":-60.047281,"maxPainDistancePct":-1.497242,"peakCallDistancePct":-1.497242,"peakPutDistancePct":null},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/MASS.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":[],"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."}