Goldman Sachs Group Inc. hired exchange owner Nasdaq Inc. to run its Sigma X stock-trading system, outsourcing day-to-day operations of its dark pool following an industrywide regulatory crackdown ...

Executives are evaluating whether the revenue generated from operating Sigma X was worth the risks encountered, including a series of trading glitches and growing criticism of dark pools ...

Goldman Sachs Group Inc. hired exchange owner Nasdaq Inc. to run its Sigma X stock-trading system, outsourcing day-to-day operations of its dark pool following an industrywide regulatory crackdown and ...

Executives are evaluating whether the revenue generated from operating Sigma X was worth the risks encountered, including a series of trading glitches and growing criticism of dark pools ...