Nowadays, the social media play a central role not only in "de-asymmetrizing" the information between firms and investors but also in influencing the emotional response to this information. The social media have provided firms with the opportunity to construct their image and stimulate...

Over the past two decades, substantial research has established the importance of sentiment in financial markets. We know that sentiment impacts investor decisions; because of advanced text mining and sentiment analysis techniques, automated trading strategies based on sentiment are prevalent....