a demand by a broker that a customer deposit enough to bring his margin up to the minimum requirement
造句
On Friday, the mixture of margin call bargains combined with sells that were waiting for the late tickers on Thursday led to a bit of a gain. 星期五，增收保證金的和約與股票行市自動收錄機顯示的星期四最后達成的交易使股市行情略有回升。