On July 8, 2015, the New York Stock Exchange "suspended trading in all symbols," for nearly four hours. Social media and news coverage exploded with questions: Was it fallout from the financial meltdown in China? Was it a hack? Was it some sort of other cyberterrorism? The answer, however, turned out to be a software glitch, coined a "black squirrel event."
"It's a big deal psychologically, because the NYSE is seen as the epicenter of the U.S. financial system," Art Hogan, chief market strategist at Wunderlich Securities, told CBS MoneyWatch.
President Obama was briefed on the situation, and it was actively monitored by both the White House and the Treasury Department until resolved. So, if squirrels in fact played any part in setting off the technical glitch, that's a lot of impact for such a small creature to have.