A margin call occurs when the equity in a trader's account falls below the required maintenance margin level. This typically happens in leveraged trading scenarios, where traders borrow funds to trade larger positions. When a margin call is issued, the trader is required to either deposit additional funds into their account or reduce their positions to restore the required margin level.
If the trader fails to take the necessary actions, the brokerage may liquidate some or all of the trader’s positions to cover the shortfall. This can lead to significant losses, especially in highly volatile markets. Understanding the mechanics behind margin calls is critical for risk management and can help traders avoid situations that may jeopardize their accounts.