The Two Margin Numbers
Initial margin is what you need to open a silver position. Maintenance margin is the lower threshold you must stay above to keep it. Fall below maintenance and you face a margin call — add funds or the position is cut for you. The exchange sets minimums, and your broker may require more.
Keep the scale in mind: the standard SI contract controls well over $100,000 of silver at typical prices. The margin is a deposit against that exposure, not a cap on what you can lose.
Why Silver Margins Deserve Extra Attention
Silver is volatile, and exchanges respond to volatility with higher margins. In a hot silver market, requirements can climb repeatedly in a matter of days. That creates the classic silver trap: the market moves against you while the margin requirement rises, forcing you to add money or exit at the worst time.
- SI (standard): 5,000 troy ounces. A $1 move is $5,000, and margin runs in the thousands of dollars.
- SIL (micro): 1,000 troy ounces. Roughly one-fifth the margin, with a $1 move worth $1,000.
- Rate checks: margins change often enough that yesterday's figure may be stale. Ask before each new position.
- Weekend risk: positions held through weekends and into report days carry gap risk that margin alone does not cover.
Funding Discipline for Silver
Treat the minimum margin as a floor you never approach, not a target. A common rule of prudence is to fund at two or three times the margin for the size you trade, so ordinary silver swings never put you on the phone with the margin desk.
Futures trading involves substantial risk of loss and is not suitable for all investors. For current silver margin rates and an honest look at whether your account size fits silver, call 317-848-8050.
A worked example keeps it honest. If silver trades near $30, one SI contract controls about $150,000 of metal. Suppose margin sits at $6,000 and silver drops two dollars — an ordinary bad week in a volatile stretch. That is a $10,000 loss, one and a half times the deposit. Funding at exactly the margin means a normal week can empty the account. Funding at two or three times margin is what turns the same week into a survivable losing trade.