Facebook is facing a level of uncertainty it hasn’t seen before, Goldman Sachs says Prison Planet.com Posted on March 20, 2018 Posted in Aggregated No Comments Tagged with Money Watch CNBC | Facebook was the worst-performing stock in the S&P 500 on Monday, posting its biggest one-day decline since March 2014. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email