Key Takeaways
- Broker demands funds if equity drops below maintenance margin.
- Triggered by losses or rising asset prices on shorts.
- Failure to meet call risks forced position liquidation.
What is Margin Call?
A margin call is a broker's demand for you to deposit additional funds or securities into your margin account when its equity falls below the required maintenance margin. This typically happens when adverse market movements reduce the value of your leveraged positions.
Margin calls protect brokers by ensuring that your account maintains enough collateral to cover borrowed funds, preventing excessive losses on leverage.
Key Characteristics
Margin calls have distinct features that every investor using margin accounts should understand:
- Triggered by equity drop: Occurs when your account equity falls below the maintenance margin requirement.
- Margin requirements: Brokers set initial and maintenance margins, which vary by asset and market conditions.
- Leverage impact: High leverage amplifies both gains and risks, increasing the chance of a margin call.
- Notification methods: Alerts are sent via email, app notifications, or phone calls.
- Response timeframe: Typically you have 2-4 business days to meet the call before forced liquidation.
How It Works
When you buy securities like stocks or ETFs using borrowed funds, your account equity equals your assets minus what you owe. If the market value of your holdings drops, your equity can fall below the broker’s maintenance margin, triggering a margin call. You then must deposit more cash or securities to restore equity or reduce your position.
For example, buying shares of the SPDR S&P 500 ETF Trust (SPY) on margin means you borrow part of the purchase price. If SPY’s price declines sharply, your margin account equity decreases, and your broker may issue a margin call to protect its lending risk.
Examples and Use Cases
Margin calls can arise in various market situations and asset types, including stocks, ETFs, and short positions:
- Stock holdings: If you purchased SPY shares on margin and the price falls, a margin call may require you to add funds quickly.
- Shortselling risks: When shorting a stock, like SPY, price increases can trigger margin calls demanding added collateral.
- Broker choice matters: Selecting from the best online brokers can influence margin requirements and call policies.
- ETF leverage: Trading leveraged ETFs, covered in best ETFs guides, often involves greater margin call risks due to amplified exposure.
Important Considerations
To manage margin call risks effectively, maintain a buffer above your maintenance margin and avoid excessive leverage. Monitoring your positions and market volatility helps preempt margin calls, giving you time to adjust holdings or add capital.
Remember, if you fail to meet a margin call, your broker can liquidate your positions at unfavorable prices, potentially wiping out your account. Understanding margin mechanics and choosing reputable firms like SPY providers is essential for risk control.
Final Words
A margin call signals that your account equity has fallen below required levels, demanding immediate action to avoid forced liquidation. Review your margin positions carefully and consider reducing leverage or adding funds to maintain your account’s health.
Frequently Asked Questions
A margin call is a demand from your broker to add more funds or securities to your margin account when your equity falls below the required maintenance margin. This usually happens when the value of your leveraged positions drops, putting your account at risk.
Margin calls are triggered when your account equity falls below the maintenance margin due to factors like declining asset values in long positions, rising prices in short positions, high leverage, or broker policy changes during volatile markets.
Initial margin is the minimum equity you need to open a position, often 50%, while maintenance margin is the ongoing minimum equity, typically 25-30%, required to keep your position open. Falling below maintenance margin triggers a margin call.
If you don’t meet a margin call within the specified timeframe, usually 2-4 business days, your broker may liquidate some or all of your positions without further notice to cover the shortfall, which can result in realized losses.
You can respond by depositing additional cash or securities to restore equity quickly, or by selling part of your position to reduce margin requirements. Doing nothing risks your broker closing your positions at unfavorable prices.
During periods of market volatility or stress, brokers may raise maintenance margin requirements to protect themselves from increased risk, which can lead to more frequent or larger margin calls.
Brokers monitor accounts in real-time, so margin calls can occur rapidly during fast markets. Notifications are usually sent via email, app alerts, or phone, replacing older methods of direct calls.


