Every day people are confronted with a torrent of news. According to Florian Zimmermann, behavioral economist of the University Bonn, Germany, can all these pieces of information not be considered independently of each other. If for example a press agency publishes a positive growth forecast, the media immediately creates a lot of news with this optimistic prognosis. And in the view of Zimmermann it is the same with online news. So, all the tweets that are repeated could be quite often just a modification of news that is already known. If this is the case, it could come to loss-making financial decisions for the shares, if the investor does not know the origin of the Tweets and trusts too much in them.
Another influence factor could be the choice of friends in social networks. As described by Cass Sunstein from the Harvard Law School, United States, people tend to connect to people they are friends with and that are quite similar to them. This could create a kind of group thinking. As the connections are of the same opinion, they quite often trust too much in them. Adapted to social media, the posts of friends can influence the objective view of a person.