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Single Stock Futures: CME's New Contracts
Deposit on a $10,000 position: Reg T stock margin versus the security futures floorranking · 2026-09-12 · 4×4Preview: 4 ranked values, largest first. Fair value of a 100 share future at an illustrative $100 spot and 4% financingranking · 2026-09-12 · 5×4Preview: 5 ranked values, smallest first.
Deposit on a $10,000 position: Reg T stock margin versus the security futures floor

Deposit on a $10,000 position: Reg T stock margin versus the security futures floor

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Deposit on a $10,000 position: Reg T stock margin versus the security futures floor — 4 rows by 4 columns, computed from US exchange, SIP and OPRA data.
regimemargin_pctdeposit_usdleverage_x
Reg T initial5050002
Reg T maintenance2525004
OneChicago era floor2020005
CME security futures floor1515006.7
the exact SQL behind every number 
SELECT
    regime,
    margin_pct,
    round(10000 * margin_pct / 100, 0) AS deposit_usd,
    round(100 / margin_pct, 1) AS leverage_x
FROM (
    SELECT 'Reg T initial' AS regime, 50 AS margin_pct
    UNION ALL SELECT 'Reg T maintenance', 25
    UNION ALL SELECT 'OneChicago era floor', 20
    UNION ALL SELECT 'CME security futures floor', 15
)
ORDER BY margin_pct DESC
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