What Is a Margin Call and How to Avoid One
A margin call happens when losses reduce your account below the required margin, forcing you to add funds or close positions.
What Is a Margin Call and How to Avoid One
A margin call is one of the most stressful events a trader can face. It happens when losses in a leveraged position reduce your account balance below the minimum your broker requires. When that happens, your broker demands more funds — or starts closing your positions for you.
What Triggers a Margin Call
When you open a leveraged trade, your broker sets two thresholds:
- Initial margin — the deposit required to open the position.
- Maintenance margin — the minimum you must keep in the account while the position is open.
If your account value falls below the maintenance margin due to losses, you receive a margin call.
Example
- You deposit $10,000 and open a $40,000 position (4:1 leverage).
- The maintenance margin requirement is 25%, or $10,000.
- If losses reduce your equity to $9,800, you fall below the threshold.
- The broker issues a margin call: deposit more funds or reduce positions.
What Happens Next
Brokers typically respond in one of three ways:
| Action | Description |
|---|---|
| Notification | You receive an email or alert demanding more funds |
| Auto-liquidation | Broker closes losing positions without asking |
| Increased requirement | Broker raises your margin requirement on short notice |
In fast markets, brokers may skip the notification and liquidate first — this is in the account agreement you signed.
How to Avoid a Margin Call
The good news is that margin calls are almost entirely preventable with discipline:
- Use stop losses on every leveraged trade. This caps losses before they threaten your margin.
- Do not use maximum leverage. Trading at 4:1 instead of 50:1 leaves a wide buffer.
- Keep cash buffer in your account. Do not put every dollar into positions.
- Monitor positions daily. Know where price must go to put you at risk.
- Avoid concentrated positions. A single big losing trade should not be able to trigger a call.
- Reduce size in volatile conditions. Wider price swings reach margin thresholds faster.
What to Do If You Get a Call
If you do receive a margin call:
- Do not panic-add funds to rescue a bad trade — this often deepens the loss.
- Close the weakest positions first to free up margin.
- Accept the loss if the trade thesis is broken.
- Review afterward to understand what went wrong with your risk management.
The Real Lesson
A margin call is rarely just bad luck. It is usually a sign that position sizing was too large, leverage was too high, or stops were absent. Each margin call you survive should be a lesson that pushes you toward tighter risk control. The goal is simple: structure your trading so that a margin call never becomes mathematically possible, no matter how the market moves.