Twitter warns U.S. election could affect ad sales, shares drop 16%
https://www.reuters.com/article/us-twitter-results/twitter-warns-u-s-election-could-affect-ad-sales-shares-drop-16-idUSKBN27E3CV
Twitter Inc on Thursday added fewer users than Wall Street had expected and said a rise in expenses would accelerate in the fourth quarter, sending its shares tumbling 16%.