有关美国证券交易所特种交易商

特种交易商英文是什么？是否Specialist Firm啊
如果是，那就是为股票造市的专家公司，一般来说有七家是制定的，不过例如bank of america这些都有资格做市的

其他7个公司是

The specialists at the NYSE are employed by seven firms. Companies listed on certain exchanges will interview employees of the specialist firms, seeking out suitable people to represent them (by holding inventories of the companies' stocks). Here are the seven NYSE specialist firms:

Bear Wagner Specialist LLC.
Fleet Specialist, Inc.
LaBranche & Co., LLC.
Performance Specialist Group, LLC.
Spear, Leeds & Kellogg Specialists LLC.
SIG Specialists, Inc.
Van der Moolen Specialists USA, LLC.