By using an extensive dataset of more than 32 million messages on 91 firms posted on the Yahoo! Finance message board over the period January 2005 to December 2010, we examine whether investor sentiment as expressed in posted messages has predictive power for stock returns, volatility, and...

We use proprietary trade as well as account-level dataset of short sales to investigate the profitability of individual investors' short-selling in the Korean stock market from August 1, 2007 to May 31, 2010. An average profit is 26,810 Korean won (roughly USD 24.4) per trade per hour and we...