Gundlach cites regulation of social networking sites as a headwind for Facebook $FB and set up a short position on the stock.Tobacco faced lots of regulation once. Look where it is now. Up. $FB, Meta Platforms, Inc. / H1 Agree? Gundlach Short Call on Facebook Dumbest recommendation in the history of the stock marketDisagree: Short Fb.Related: Twitter $TWTR reports this week and may hold the $31+ range. Facebook reports this week, too. $SNAP is an obvious short.