https://phys.org/news/2018-06-twitter-added-sp-index-news.html > The announcement came from S&P Dow Jones Indexes after the close of trading last night. > The tech company's visibility has skyrocketed since President Trump entered the White House. He has used the digital communications platform to tweet messages on topics from trade and the economy, to the NFL's kneeling controversy during the national anthem without any media filters.