202,616 Twitter posts covering 1,082 firms from November 2008 to June 2011 reveal that nonlocal Twitter posters consistently exhibit negative stock return predictability. Since nonlocal posts dominate the sentiment information from social media, this contrarian result highlights the danger of...

202,616 Twitter posts covering 1,082 firms from November 2008 to June 2011 reveal that nonlocal Twitter posters consistently exhibit negative stock return predictability. Since nonlocal posts dominate the sentiment information from social media, this contrarian result highlights the danger of...