Social media bots and stock markets
研究社交媒体机器人发布的推文与股票交易的关系，发现机器人推文与股票收益、波动率和交易量在日度和日内层面均显著相关，且事件研究进一步证实了异常推文量后的股价反应。
Abstract This study examines the link between information spread by social media bots and stock trading. Based on a large sample of tweets mentioning 55 companies in the FTSE 100 composites, we find significant relations between bot tweets and stock returns, volatility, and trading volume at both daily and intraday levels. These results are also confirmed by an event study of stock response following abnormal increases in the volume of tweets. The findings are robust to various specifications, including controlling for traditional news channel, alternative measures of volatility, information flows in pretrading hours, and different measures of sentiment.