Wisdom of Crowds: The Value of Stock Opinions Transmitted Through Social Media
研究了通过社交媒体传播的投资者观点能否预测未来股票收益和盈利意外，对文章和评论进行文本分析后发现两者均有预测能力。
Social media has become a popular venue for individuals to share the results of their own analysis on financial securities. This paper investigates the extent to which investor opinions transmitted through social media predict future stock returns and earnings surprises. We conduct textual analysis of articles published on one of the most popular social media platforms for investors in the United States. We also consider the readers' perspective as inferred via commentaries written in response to these articles. We find that the views expressed in both articles and commentaries predict future stock returns and earnings surprises.