Each transaction is carried out in public, and the information sent electronically to every brokerage office of the nation. 每笔交易都是公开进行的，并通过电子设备把交易资料发往全国各地的每一家经纪人事务所。
A brokerage house usually handles purchases and sales of these stocks along with those on the major exchanges. 经纪人事务所通常在经营大宗股票的同时也进行上述这类股票的交易。
