Goldman Joins Citigroup in Expanding Cyber Threat Lists

Goldman Sachs Group Inc. and Citigroup Inc. stepped up warnings to shareholders about cyber attacks as the U.S. prodded banks and government agencies to bolster their defenses.

Online and mobile banking give new points of entry that can be used to disrupt or penetrate operations, the two New York-based firms said last week in annual regulatory filings. The companies said they’re vulnerable to tactics that overload websites to shut off public access, such as assaults that disrupted the nation’s largest lenders late last year.