If your account value has not gone back up, however, and you have failed to deposit funds or securities by the required date, the brokerage firm is permitted to liquidate ANY securities in your account to satisfy the call. The firm may do so without regard to market price or any profit or loss to you. It may or may not send you a liquidation notice. Brokerage firms are not responsible for the market performance of any securities in your account. Losing money on a securities investment does not necessarily indicate a violation of the securities law.
Margin trading is risky.
And margin trading in a volatile market is even riskier. Be sure you understand how margin accounts work before using one and know your responsibilities for maintaining that account in sound financial order.