Interactions of Stock Mispricing and News Sentiment

What happens to mispriced stocks when associated firms issue positive or negative news? In their February 2024 paper entitled “Beauty Contests and Higher Order Beliefs: Evidence from News Releases”, Tarun Chordia, Bin Miao and Joonki Noh examine interactions of stock mispricing and news release sentiment. They consider 11 mispricing signals to identify overpriced and underpriced stocks (excluding those with prices under $5 at the beginning of each month). They measure news release sentiment each day for each firm based on average RavenPack sentiment score for all news articles about the firm on a given day. Using time series of data as specified during January 2000 through December 2019, they find that:

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