The articles revealed that Bloomberg LP and Thomson Reuters PLC have acknowledged that they, too, have suffered attacks, but they have not indicated who may have been behind them.

FORBES: Cyber Attacks on Press Reveal Gap in US Diplomacy

Among the largest underlying components of PID, in trading today Shaw Communications Inc ( NYSE: SJR) is up about 1.1%, Thomson Reuters Corp ( NYSE: TRI) is up about 2.5%, and Pearson Plc ( NYSE: PSO) is higher by about 1.7%.

FORBES: PID, SJR, TRI, PSO: ETF Outflow Alert