Communication and Comovement: Evidence from Online Stock Forums

被引：29
|
作者：
Jiang, Lei [1 ]
Liu, Jinyu [2 ]
Yang, Baozhong [3 ]
机构：
[1] Tsinghua Univ, Sch Econ & Management, Finance, Beijing, Peoples R China
[2] Univ Int Business & Econ, Sch Banking & Finance, Finance, Beijing, Peoples R China
[3] Georgia State Univ, Robinson Coll Business, Finance, Atlanta, GA 30303 USA
来源：
FINANCIAL MANAGEMENT | 2019年 / 48卷 / 03期
基金：
美国国家科学基金会;
关键词：
CROSS-SECTIONAL VARIATION; EARNINGS UNCERTAINTY; INFORMATION-CONTENT; INVESTOR SENTIMENT; RETURNS; PRICE; MODEL; EQUILIBRIUM; ATTENTION; MOMENTUM;
D O I：
10.1111/fima.12245
中图分类号：
F8 [财政、金融];
学科分类号：
0202 ;
摘要：
We study investor communication and stock comovement using a novel data set from an active online stock forum in China. We find substantial comovement among the returns of a stock and its "related stocks," which are frequently discussed in the subforum dedicated to the given stock. Comovement is greater when the discussion of related stocks is more intensive. Further, the effect of communication on comovement is stronger for stocks associated with higher information uncertainty. Codiscussed stocks are more actively traded and experience more correlated trading. A trading strategy that exploits communication-driven comovement generates abnormal returns. Our findings highlight the impact of investor communication on asset comovement.
引用
收藏
页码：805 / 847
页数：43
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