{"success":true,"engine":"Black Belt Labs","metric_id":"M50042","name":"Perpetual Premium Index","category":"derivatives","classification":"classic","update_frequency":null,"inputs":["Exchange market data"],"inputs_are":"types of input","lookback_windows":["3 HOUR"],"lookback_basis":"windows found in the implementation (INTERVAL clauses)","formula":"Average perp basis: (mark - index) / index in percent across tracked perps.","formula_published":true,"definition_version":"v00001","definition_history":[{"version":"v00001","effective_from":"2026-07-15T03:45:40Z","change_note":"initial recorded definition"}],"methods":["progr"],"disclaimer":"Madjik metrics are informational market indicators computed by Black Belt Labs. They are not investment advice, an offer, or a recommendation to buy or sell any asset."}