Why Facebook's Tanking TodayBrian Barrett5/21/12 11:03amFiled to: facebook ipoFacebookIpoMoneyTop1362EditPromoteShare to KinjaToggle Conversation toolsGo to permalinkThe stock is falling! The stock is falling! If you stopped following the Facebook IPOcalypse on Friday, it might be time to pull up another chair. FB has plummeted 12 percent as of this writing, with no signs of pulling out of its nosedive. Ruh roh.AdvertisementBut don't worry! There's a perfectly good explanation for all of this. The truth is, Facebook's been heading for a tailspin since the very first trade.Here Comes the DropYou've probably read that the initial Facebook IPO price was $38. And that's true enough, technically. But the only people getting in on that $38 price point were big institutional banks and their clients. That trading occurred Friday morning, before FB officially hit Nasdaq, and drove the price up to $42 by the time it was actually publicly traded.ShareTweet Kinja is in read-only mode. We are working to restore service.