This is the fake tweet (the AP twitter account was hacked) that yesterday caused the US Stock market to briefly lose $200 billion worth of value:

While the market recovered afterwards, I take this as yet another reminder that social media are not merely mimicking functions played by traditional forms of media. This incident points to two crucial aspects of divergence. First, the speed at which information can spread across social media networks is truly stunning. Note the time on the tweet: 1:07 PM. Now note the time of the market drop:

Second, this event took place because someone hacked the AP twitter feed (according to the Wall Street journal “a group of enthusiastic Syrian youths” have claimed responsibility). It’s difficult to imagine anyone hacking the front page of the NY Times or brainwashing Walter Cronkite. Moreover, while hacking the AP account certainly enhanced the number of followers who saw the tweet and enhanced it’s credibility, it is not difficult to imagine this sort of “hoax” spreading quickly from a home grown Twitter account either, especially given the fact that plenty of people access Tweets via #hashtags (keywords) in addition to simply following others. At its core, social media continue to be differentiated from traditional media by the fact that anyone can send a message. How many people will listed to that message will of course vary, but send the right message in the right circumstances that looks the right way, and you can knock $200 billion out of the US economy in a heartbeat.

[h/t to Per Dutton.]

[Cross-posted at The Monkey Cage]

Joshua Tucker

Joshua Tucker is a Professor of Politics at New York University.