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Internet Message Board Activity and Market Efficiency: A Case Study of the Internet Service Sector using RagingBull.Com
Author(s) -
Tumarkin Robert
Publication year - 2002
Publication title -
financial markets, institutions and instruments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.386
H-Index - 23
eISSN - 1468-0416
pISSN - 0963-8008
DOI - 10.1111/1468-0416.11403
Subject(s) - the internet , business , service (business) , telecommunications , computer science , world wide web , marketing
This paper examines the relationships between Internet message-board activity and abnormal stock returns and between Internet message-board activity and abnormal trading volume. This study focuses on RagingBull.com and Internet service sector stocks. I choose RagingBull.com because its format enables me to measure investor opinion objectively. I find that on days with abnormally high message activity changes in investor opinion correlate with abnormal industry-adjusted returns. Additionally, days with abnormally high message activity coincide with abnormally high trading volume both that day and the following day. However, I find that, in general, message-board activity does not predict industry-adjusted returns or abnormal trading volume.