The US Department of Homeland Security and the US Securities and Exchange Commission released statements indicating the disruption was the result of a computer glitch and not an act of terrorism. The NYSE also says the stoppage was due to an internal glitch and not a coordinated cyberattack.

Just a few hours before the NYSE stoppage, United Airlines suffered a computer-related system shutdown, causing a nationwide groundstop. The Wall Street Journal also was inaccessible for a brief period.