Disagreement after News: Gradual Information Diffusion or Differences of Opinion?
研究了新闻发布后交易量增加的两种解释：信息逐步扩散和观点差异。利用金融专业人士的新闻点击数据，发现两者互补，且信息扩散对直白新闻更重要，观点差异对模糊新闻影响更大。
Abstract This paper considers the puzzle of increased trading volume around information releases through the lens of canonical models of disagreement. I use a unique data set of clicks on news by key finance professionals to simultaneously measure gradual information diffusion and differences of opinion. I find that neither channel subsumes the other and that the two are complementary in generating trading volume around news events. Their relative strengths depend on the characteristics of the underlying information: gradual information diffusion matters more for straightforward news, while differences of opinion play a larger role around textually ambiguous news. Received January 12, 2020; editorial decision: November 24, 2020 by Editor: Jeffrey Pontiff. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.