The AP Twitter account was just hacked, reporting of an explosion in the White House and President Obama injured. That rumor was immediately dispelled by Sam Hananel, a writer for the AP.
And here is what happened as soon as the Twitter hack tweet occurred–A sharp, sudden intraday sell-off.
If the news had been true, of course that is a major, global story.
But the issue of how sensitive the market is to a Twitter hack, and the power hackers now have, is the real story here.