Why did Apple stock jump yesterday? Blame this guy

But it’s hard not to pin Tuesday’s action in Apple to [Seabreeze Partners hedge fund president Douglas] Kass’ Twitter posts or to see how he profited from them. The stock was down. He tweeted the split rumor. The stock went up. He sold shares while tweeting that his rumor was baseless.

Good on Philip Elmer-Dewitt for calling this like he sees it.