If the social media ad boycott spreads, it will be a case of the winner taking all (the arrows)!

Between $FB, $GOOG, $AMZN, $MSFT and $TWTR, #Facebook is most exposed to the $99 bn social ad market. 

A $1 drop in $FB's EPS could kill the stock by 15%-30% on my calcs. Ouch! https://t.co/G0oeJtqiOp