{"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/GRAL","markdown_url":null,"history_url":"https://halfonadouble.com/api/v1/history/GRAL.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/GRAL.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":"GRAL","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":117.80999755859375,"previous_close":135.4600067138672,"delta_neutral":93.7543955638306,"gamma_neutral":100.54236212993227,"gamma_max":149.9252446569515,"total_open_interest":19366,"previous_open_interest":51704,"listed_contracts":218,"listed_calls":151,"listed_puts":123,"gamma_max_distance_pct":27.260205215083687,"delta_neutral_distance_pct":-20.418981829448647,"gamma_neutral_distance_pct":-14.65719021008661,"open_interest_change_1d_pct":-62.54448398576512,"call_open_interest":12373,"put_open_interest":6993,"put_call_open_interest_ratio":0.5651822516770387,"nearest_expiration_max_pain":140,"nearest_expiration_max_pain_expiry":"2026-11-20","nearest_expiration_max_pain_distance_pct":18.835415415716202,"all_expiration_max_pain":75,"net_gamma_exposure":113682.49876758705,"net_gamma_exposure_per_100k_open_interest":587021.0614870755,"gamma_exposure_flip":100.54236212993227,"gamma_exposure_flip_distance_pct":-14.65719021008661,"call_wall":110,"call_wall_distance_pct":-6.629316459080126,"put_wall":90,"put_wall_distance_pct":-23.60580437561101,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":1485},"history_summary":null,"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":null,"directional_score":null,"catalyst_reasons":[],"features":{"price":117.81,"totalOi":51563,"analysisCoverage":1,"avgIvPct":637.2,"ivRank":68.6,"iv52wHighPct":918.3,"iv52wLowPct":21.8,"frontDte":35,"termPremiumPp":0,"riskReversalFrontPp":-2.98,"riskReversal30dPp":-2.98,"butterflyFrontPp":-8.6,"butterfly30dPp":-8.6,"putCallOiRatio":1.066,"putCallOiFrontRatio":1.874,"putCallVolumeFrontRatio":1.047,"optionVolume":1487,"volumeOiRatio":0.028839,"netDeltaNormalized":0.284147,"dealerDeltaNormalized":-0.284125,"gexPer100kOi":2272272.268875,"vannaPer100kOi":-490.661909,"charmPer100kOi":84913.600838,"weekendDeltaShiftPer100kOi":254738.863138,"ivSurfaceRangePp":18.4,"gammaFlipDistancePct":-95.74739,"maxPainDistancePct":-27.849928,"peakCallDistancePct":10.347169,"peakPutDistancePct":1.858925},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/GRAL.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."}