https://www.cnbc.com/2018/09/05/twitter-shares-drop-6percent-during-dorseys-senate-testimony.html

Twitter shares dropped more than 6 percent Wednesday during CEO Jack Dorsey's testimony before the Senate Intelligence Committee on meddling in the 2016 U.S. election.

Dorsey is testifying alongside Facebook COO Sheryl Sandberg about election meddling and abuse on their platforms. Google was also invited to testify, but the tech giant declined to send its CEO or parent company Alphabet's CEO.