This Internet Appendix includes supplementary discussion and analyses. The original paper "Capital Market Effects of Media Synthesis and Dissemination: Evidence from Robo-Journalism" is available at the following URL: 'http://ssrn.com/abstract=2872784' http://ssrn.com/abstract=2872784

In 2014, the Associated Press (AP) began using algorithms to write articles about firms' earnings announcements. These “robo-journalism” articles synthesize information from firms' press releases, analyst reports, and stock performance and are widely disseminated by major news outlets a few...

We use trade-level data to examine the role of actively managed funds (AMFs) in earnings news dissemination. We find AMFs are drawn to, and participate disproportionately more in, earnings announcements (EAs) that include bundled managerial guidance. When the two pieces of news are directionally...

We investigate whether unpleasant environmental conditions affect stock market participants' responses to information events. We draw from psychology research to develop a new prediction that weather-induced negative moods reduce market participants' activity levels. Exploiting geographic...

We investigate whether unpleasant environmental conditions affect stock market participants' responses to information events. We draw from psychology research to develop a new prediction that weather-induced negative moods reduce market participants' activity levels. Exploiting geographic...