Measures of information traditionally arise from curated, professional sources such as newspapers, analyst coverage, earnings announcements, and business news wires. We utilize Twitter activity to examine the impact of attention generated by individuals. Causal evidence shows that Twitter...

Using 2020-2021 data from social media platform Reddit, we examine connections among stockprices, retail trading, short-selling and social media activity. Higher Reddit traffic, more positivetone, and higher Reddit connectedness predict higher returns, greater and more positive retail orderflow,...

We classify the sentiment of a large sample of StockTwits messages as bullish,bearish or neutral, and create a stock-aggregate daily sentiment polarity measure.Polarity is positively associated with contemporaneous stock returns. On average,polarity is not able to predict next-day stock returns....