How Long Can You Hold a Short Position?
FINRA Rule 4210 maintenance margin per share short, by share priceranking ·
2026-09-11 · 9×3
Daily and 30-day borrow cost on a $10,000 short, by annualized fee rateranking ·
2026-09-11 · 7×3
FINRA Rule 4210 maintenance margin per share short, by share price
FINRA Rule 4210 maintenance margin per share short, by share price
| share_price | maintenance_per_share_usd | pct_of_market_value |
|---|---|---|
| $2 | 2.5 | 125 |
| $4 | 4 | 100 |
| $5 | 5 | 100 |
| $10 | 5 | 50 |
| $15 | 5 | 33.3 |
| $20 | 6 | 30 |
| $30 | 9 | 30 |
| $50 | 15 | 30 |
| $100 | 30 | 30 |
the exact SQL behind every number
SELECT
concat('$', toString(price)) AS share_price,
round(if(price >= 5, greatest(5.0, 0.30 * price), greatest(2.5, toFloat64(price))), 2) AS maintenance_per_share_usd,
round(100.0 * maintenance_per_share_usd / price, 1) AS pct_of_market_value
FROM (SELECT arrayJoin([2, 4, 5, 10, 15, 20, 30, 50, 100]) AS price)
ORDER BY price
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