| 1. | In trading , margins on cash equities , which used to be wall street ' s signature business , have been hit by electronic platforms and by rules to increase price transparency , such as regulation national market system ( known as reg nms ) in america 现金证券的买卖? ?华尔街曾经的招牌业务? ?惨遭来自电子交易平台以及诸如美国国家市场调控系统之类的增加价格透明度的法规的打击。 |