Twitter stock is up after they've posted their fastest revenue growth since 20 14 on thurs. Short cuto: Twitterer announced cu to earnings that came in much stronger than expected. On friday, the stock was up four % and is up ten % since the beginning of the week. Their market cap is now 57 billion, nearing its all time high of over 60 billion,. whih they hit back in february. That's another profegy.