I don't like the implications that his tweets are what cause all of the stock's price movements. Sometimes they obviously have an impact, with his infamous $420 privatization tweet being the best example, but as for the last few days of the market, stocks were down significantly across the entire market, and TSLA has always been very volatile. Tweets can have an effect but it's not fair to simply look at a tweet, then notice that the stock is down 5% today, then assume that is causation instead of correlation. I'm not denying his tweeting may be very influential, but there's much more to the market price than just that.