{"slug":"fed-call-vs-house-call","qid":"margin_call_lines","label":"margin_call_lines","post_title":"fed-call-vs-house-call","post_url":"/blog/fed-call-vs-house-call#q-margin_call_lines","columns":["call_type","requirement_pct","trigger_price","market_value_at_trigger","equity_at_trigger"],"rows":[{"call_type":"Fed call (50% initial)","requirement_pct":50,"trigger_price":100,"market_value_at_trigger":20000,"equity_at_trigger":10000},{"call_type":"House call (30% maintenance)","requirement_pct":30,"trigger_price":71.43,"market_value_at_trigger":14286,"equity_at_trigger":4286},{"call_type":"Exchange call (25% maintenance)","requirement_pct":25,"trigger_price":66.67,"market_value_at_trigger":13333,"equity_at_trigger":3333}],"shape":"table","sql":"SELECT\n    call_type,\n    requirement_pct,\n    round(10000 / (1 - requirement_pct / 100) / 200, 2) AS trigger_price,\n    round(10000 / (1 - requirement_pct / 100))          AS market_value_at_trigger,\n    round(10000 / (1 - requirement_pct / 100) - 10000)  AS equity_at_trigger\nFROM\n(\n    SELECT 'Fed call (50% initial)' AS call_type, 50 AS requirement_pct\n    UNION ALL\n    SELECT 'House call (30% maintenance)', 30\n    UNION ALL\n    SELECT 'Exchange call (25% maintenance)', 25\n)\nORDER BY trigger_price DESC","computed_at":"2026-09-12T01:47:55.946623+00:00","elapsed":0.002074034}