Why AT&T Stock Sagged on Monday

A major hacking incident disclosed over the weekend led to a minor sell-off in AT&T (T -0.57%) stock as the trading week kicked off on Monday. The telecom giant's shares dipped by 0.6% on the day, which was a steeper fall than the bellwether S&P 500 index's 0.2% slide.Large data set found on the dark webThe previous Saturday, AT&T revealed that data fields specific to the company were found in a data set released on the dark web. This occurred roughly two weeks previously and, according to a preliminary ana ...