{"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/SILJ","markdown_url":"https://halfonadouble.com/stock/SILJ.md","history_url":"https://halfonadouble.com/api/v1/history/SILJ.csv","advanced_analysis_url":"https://halfonadouble.com/api/v1/analysis/SILJ.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":"SILJ","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":25.65999984741211,"previous_close":25.639999389648438,"delta_neutral":21.515650969538022,"gamma_neutral":5.368870512730438,"gamma_max":31.05089824086047,"total_open_interest":558470,"previous_open_interest":580705,"listed_contracts":533,"listed_calls":332,"listed_puts":244,"gamma_max_distance_pct":21.008957231120363,"delta_neutral_distance_pct":-16.15100897318227,"gamma_neutral_distance_pct":-79.0768879787351,"open_interest_change_1d_pct":-3.8289665148397205,"call_open_interest":493759,"put_open_interest":64711,"put_call_open_interest_ratio":0.13105786426171473,"nearest_expiration_max_pain":26,"nearest_expiration_max_pain_expiry":"2026-10-23","nearest_expiration_max_pain_distance_pct":1.325020088112669,"all_expiration_max_pain":23.5,"net_gamma_exposure":25295807.778652865,"net_gamma_exposure_per_100k_open_interest":4529483.728517712,"gamma_exposure_flip":5.368870512730438,"gamma_exposure_flip_distance_pct":-79.0768879787351,"call_wall":30,"call_wall_distance_pct":16.91348471705308,"put_wall":25,"put_wall_distance_pct":-2.5720960691224337,"gamma_max_cross_direction":null,"delta_neutral_cross_direction":null,"open_interest_rank":178},"history_summary":{"first_date":"2020-12-01","last_date":"2026-10-16","session_count":1404,"trailing_window_sessions":252,"sessions_above_gamma_max_pct":9.126984126984127,"gamma_max_cross_count":25,"delta_neutral_cross_count":0,"gamma_max_prior_sessions_closer_pct":95.23809523809523,"gamma_max_prior_comparison_sessions":252,"delta_neutral_prior_sessions_closer_pct":23.809523809523807,"delta_neutral_prior_comparison_sessions":252,"open_interest_percentile_1y":29.365079365079367,"open_interest_change_1d_contracts":-22235,"open_interest_change_z_252":-0.4822513917168139,"open_interest_change_z_comparison_sessions":252,"open_interest_change_5_sessions_pct":2.815472672811993,"open_interest_change_21_sessions_pct":-5.14567756969662,"call_put_open_interest_changes":{"one_session":{"call_change_contracts":-8034,"put_change_contracts":-14201,"call_growth_pct":-1.6010586038466061,"put_growth_pct":-17.995995539334956,"call_minus_put_growth_pp":16.39493693548835},"five_sessions":{"call_change_contracts":12152,"put_change_contracts":3141,"call_growth_pct":2.523219139256697,"put_growth_pct":5.101510475881111,"call_minus_put_growth_pp":-2.578291336624414},"call_change_surprise":{"z_score":-0.2587974405664365,"comparison_sessions":252},"put_change_surprise":{"z_score":-0.7451385232509379,"comparison_sessions":252},"call_minus_put_growth_surprise":{"z_score":1.1630533425458975,"comparison_sessions":252}}},"advanced_options":{"data_through":"2026-10-16","analysis_coverage":1,"catalyst_score":63.5888757015554,"directional_score":44.187035496766924,"catalyst_reasons":["25Δ risk reversal -128.3 pp","volume/OI 0.11","front IV premium 6.5 pp"],"features":{"price":25.66,"totalOi":624638,"analysisCoverage":1,"avgIvPct":179.7,"ivRank":95.4,"iv52wHighPct":185.4,"iv52wLowPct":62,"frontDte":7,"termPremiumPp":6.523,"riskReversalFrontPp":-128.3,"riskReversal30dPp":-37.67,"butterflyFrontPp":1.84,"butterfly30dPp":5.88,"putCallOiRatio":0.155,"putCallOiFrontRatio":0.928,"putCallVolumeFrontRatio":19.037,"optionVolume":66798,"volumeOiRatio":0.106939,"netDeltaNormalized":0.147918,"dealerDeltaNormalized":-0.147178,"gexPer100kOi":380274.787957,"vannaPer100kOi":3077.302374,"charmPer100kOi":-90897.607894,"weekendDeltaShiftPer100kOi":-272692.983776,"ivSurfaceRangePp":144,"gammaFlipDistancePct":-63.678878,"maxPainDistancePct":-2.572097,"peakCallDistancePct":9.119252,"peakPutDistancePct":-2.572097},"complete_analysis_url":"https://halfonadouble.com/api/v1/analysis/SILJ.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":[{"direction":"above","event_count":43,"completed_path_count":43,"latest_cross_date":"2026-05-06","horizons":[{"sessions":1,"sample_size":43,"median_return_pct":-0.17761267247445867,"p25_return_pct":-1.38701405423719,"p75_return_pct":1.4506508467001633,"above_zero_pct":41.86046511627907,"median_interval_low_pct":-0.8804993270897898,"median_interval_high_pct":0.6882959124787869,"median_interval_nominal_coverage_pct":93.40059655442019,"confidence_floor_pct":0},{"sessions":3,"sample_size":43,"median_return_pct":0.7462653941384456,"p25_return_pct":-2.6085327647864864,"p75_return_pct":4.348663691986232,"above_zero_pct":58.139534883720934,"median_interval_low_pct":-1.1590428499448913,"median_interval_high_pct":2.589285417783005,"median_interval_nominal_coverage_pct":93.40059655442019,"confidence_floor_pct":0},{"sessions":5,"sample_size":43,"median_return_pct":0.38635171054970385,"p25_return_pct":-3.046108658419211,"p75_return_pct":5.479943492904804,"above_zero_pct":51.162790697674424,"median_interval_low_pct":-1.8983032743809636,"median_interval_high_pct":2.979843620813072,"median_interval_nominal_coverage_pct":93.40059655442019,"confidence_floor_pct":0},{"sessions":10,"sample_size":43,"median_return_pct":1.4166147508794413,"p25_return_pct":-5.655331351036757,"p75_return_pct":6.768939185881484,"above_zero_pct":58.139534883720934,"median_interval_low_pct":-2.0240394687244034,"median_interval_high_pct":4.464285790312039,"median_interval_nominal_coverage_pct":93.40059655442019,"confidence_floor_pct":0}]},{"direction":"below","event_count":40,"completed_path_count":40,"latest_cross_date":"2026-04-02","horizons":[{"sessions":1,"sample_size":40,"median_return_pct":-0.06506019596052015,"p25_return_pct":-1.3713119414016566,"p75_return_pct":0.9764798415112408,"above_zero_pct":47.5,"median_interval_low_pct":-0.7603221775539848,"median_interval_high_pct":0.4161694179207309,"median_interval_nominal_coverage_pct":91.93095322480076,"confidence_floor_pct":0},{"sessions":3,"sample_size":40,"median_return_pct":-0.07587384255574592,"p25_return_pct":-3.093451975649672,"p75_return_pct":2.869694809278039,"above_zero_pct":50,"median_interval_low_pct":-1.815821865018341,"median_interval_high_pct":1.1506239733162449,"median_interval_nominal_coverage_pct":91.93095322480076,"confidence_floor_pct":0},{"sessions":5,"sample_size":40,"median_return_pct":0.9826842501298283,"p25_return_pct":-2.8226880696716443,"p75_return_pct":4.84193547772962,"above_zero_pct":52.5,"median_interval_low_pct":-1.3831245417532223,"median_interval_high_pct":3.005068423195212,"median_interval_nominal_coverage_pct":91.93095322480076,"confidence_floor_pct":0},{"sessions":10,"sample_size":40,"median_return_pct":0.6884186132208536,"p25_return_pct":-6.8720322088864165,"p75_return_pct":7.29667048289111,"above_zero_pct":55.00000000000001,"median_interval_low_pct":-4.606358931236166,"median_interval_high_pct":3.448275471042539,"median_interval_nominal_coverage_pct":91.93095322480076,"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."}