{"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/BTG","markdown_url":"https://halfonadouble.com/stock/BTG.md","history_url":"https://halfonadouble.com/api/v1/history/BTG.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/BTG.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":"BTG","page_tier":"A","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":5.199999809265137,"previous_close":5.170000076293945,"delta_neutral":3.291026314532459,"gamma_neutral":1.015454994183099,"gamma_max":5.3838094996306545,"total_open_interest":582145,"previous_open_interest":586306,"listed_contracts":128,"listed_calls":115,"listed_puts":73,"gamma_max_distance_pct":3.5348018674541777,"delta_neutral_distance_pct":-36.711030091411736,"gamma_neutral_distance_pct":-80.47201862635063,"open_interest_change_1d_pct":-0.7096976664062793,"call_open_interest":515277,"put_open_interest":66868,"put_call_open_interest_ratio":0.12977097755187986,"nearest_expiration_max_pain":5,"nearest_expiration_max_pain_expiry":"2026-10-09","nearest_expiration_max_pain_distance_pct":-3.8461503192516595,"all_expiration_max_pain":3.5,"net_gamma_exposure":45650210.617773294,"net_gamma_exposure_per_100k_open_interest":7841725.105905452,"gamma_exposure_flip":1.015454994183099,"gamma_exposure_flip_distance_pct":-80.47201862635063,"call_wall":5.5,"call_wall_distance_pct":5.769234648823176,"put_wall":5,"put_wall_distance_pct":-3.8461503192516595,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":175},"history_summary":{"first_date":"2020-12-01","last_date":"2026-10-02","session_count":986,"trailing_window_sessions":252,"sessions_above_gamma_max_pct":48.80952380952381,"gamma_max_cross_count":35,"delta_neutral_cross_count":0,"gamma_max_prior_sessions_closer_pct":31.746031746031743,"gamma_max_prior_comparison_sessions":252,"delta_neutral_prior_sessions_closer_pct":50.39682539682539,"delta_neutral_prior_comparison_sessions":252,"open_interest_percentile_1y":26.58730158730159,"open_interest_change_1d_contracts":-4161,"open_interest_change_z_252":-0.17986431176857434,"open_interest_change_z_comparison_sessions":252,"open_interest_change_5_sessions_pct":6.58072760760233,"open_interest_change_21_sessions_pct":2.677232849941619,"call_put_open_interest_changes":{"one_session":{"call_change_contracts":-1180,"put_change_contracts":-2981,"call_growth_pct":-0.2284798153573289,"put_growth_pct":-4.2677776346118055,"call_minus_put_growth_pp":4.039297819254476},"five_sessions":{"call_change_contracts":38975,"put_change_contracts":-3031,"call_growth_pct":8.182833580375476,"put_growth_pct":-4.33625659880685,"call_minus_put_growth_pp":12.519090179182326},"call_change_surprise":{"z_score":-0.09873263673919999,"comparison_sessions":252},"put_change_surprise":{"z_score":-0.26726260378338834,"comparison_sessions":252},"call_minus_put_growth_surprise":{"z_score":0.6211691181843446,"comparison_sessions":252}}},"advanced_options":{"data_through":"2026-10-02","analysis_coverage":1,"catalyst_score":52.93196744520048,"directional_score":2.362204724409448,"catalyst_reasons":["front IV premium 6.1 pp","25Δ risk reversal 16.5 pp"],"features":{"symbol":"BTG","price":5.2,"totalOi":587581,"analysisCoverage":1,"avgIvPct":919.9,"ivRank":47.2,"iv52wHighPct":1859.4,"iv52wLowPct":80.98,"frontDte":7,"frontAtmIvPct":59.14,"backAtmIvPct":53.0027,"termPremiumPp":6.1373,"expectedMoveFrontPct":8.19,"straddleFrontPct":8.17,"straddle30dPct":11.06,"riskReversalFrontPp":16.48,"riskReversal30dPp":1.57,"butterflyFrontPp":-0.1,"butterfly30dPp":4.35,"putCallOiRatio":0.135,"putCallOiFrontRatio":0.154,"putCallVolumeFrontRatio":1.65,"optionVolume":6327,"volumeOiRatio":0.010768,"netDeltaNormalized":0.399616,"dealerDeltaNormalized":-0.384258,"gexPer100kOi":438454.665825,"vannaPer100kOi":1062.661999,"charmPer100kOi":-54550.776829,"weekendDeltaShiftPer100kOi":-163652.500677,"ivSurfaceRangePp":67.7,"gammaFlipDistancePct":-60.961538,"maxPainDistancePct":-32.692308,"peakCallDistancePct":-3.846154,"peakPutDistancePct":-3.846154},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/BTG.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":[{"direction":"above","event_count":53,"completed_path_count":52,"latest_cross_date":"2026-09-25","horizons":[{"sessions":1,"sample_size":53,"median_return_pct":-0.6036163830508867,"p25_return_pct":-2.4714849578733378,"p75_return_pct":1.9390629832558126,"above_zero_pct":41.509433962264154,"median_interval_low_pct":-1.4970045988375258,"median_interval_high_pct":0.40774679043886763,"median_interval_nominal_coverage_pct":90.16293515595082,"confidence_floor_pct":0},{"sessions":3,"sample_size":53,"median_return_pct":-1.6736484734677592,"p25_return_pct":-4.456327879681998,"p75_return_pct":1.7647089072715394,"above_zero_pct":33.9622641509434,"median_interval_low_pct":-2.929689428128812,"median_interval_high_pct":-0.772200061362871,"median_interval_nominal_coverage_pct":90.16293515595082,"confidence_floor_pct":-0.772200061362871},{"sessions":5,"sample_size":53,"median_return_pct":-0.7827780980020682,"p25_return_pct":-4.7528515042126624,"p75_return_pct":2.5362294740822966,"above_zero_pct":39.62264150943396,"median_interval_low_pct":-2.8985479703797723,"median_interval_high_pct":0.595242262607476,"median_interval_nominal_coverage_pct":90.16293515595082,"confidence_floor_pct":0},{"sessions":10,"sample_size":52,"median_return_pct":-3.790928609336042,"p25_return_pct":-6.089756962784005,"p75_return_pct":2.3919350196743405,"above_zero_pct":40.38461538461539,"median_interval_low_pct":-5.0179164300996,"median_interval_high_pct":0.653594160147164,"median_interval_nominal_coverage_pct":92.96057789329377,"confidence_floor_pct":0}]},{"direction":"below","event_count":49,"completed_path_count":47,"latest_cross_date":"2026-09-30","horizons":[{"sessions":1,"sample_size":49,"median_return_pct":0.5277039875413392,"p25_return_pct":-0.9578489637423804,"p75_return_pct":2.1428585052490234,"above_zero_pct":53.06122448979592,"median_interval_low_pct":-0.5434777327093077,"median_interval_high_pct":1.651379004360476,"median_interval_nominal_coverage_pct":91.45668668426055,"confidence_floor_pct":0},{"sessions":3,"sample_size":48,"median_return_pct":-0.5526926717305314,"p25_return_pct":-2.636979285973695,"p75_return_pct":3.3938506728008297,"above_zero_pct":47.91666666666667,"median_interval_low_pct":-1.2843981151195227,"median_interval_high_pct":2.3904359763948557,"median_interval_nominal_coverage_pct":94.05366247462297,"confidence_floor_pct":0},{"sessions":5,"sample_size":48,"median_return_pct":-1.399044399843935,"p25_return_pct":-3.792791773084084,"p75_return_pct":2.6207569283286656,"above_zero_pct":41.66666666666667,"median_interval_low_pct":-2.8112422881404364,"median_interval_high_pct":0.8064508376086854,"median_interval_nominal_coverage_pct":94.05366247462297,"confidence_floor_pct":0},{"sessions":10,"sample_size":47,"median_return_pct":-1.6233725351285533,"p25_return_pct":-7.911490636033141,"p75_return_pct":2.6139800285487125,"above_zero_pct":40.42553191489361,"median_interval_low_pct":-4.819282068998332,"median_interval_high_pct":0.7326000288198298,"median_interval_nominal_coverage_pct":92.10593063185115,"confidence_floor_pct":0}]}],"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."}