Here are several full research papers and detailed studies focusing on the effectiveness, distribution, and performance of stock "buy," "hold," and "sell" ratings. Key Research Papers on Stock Ratings
: On average, recommendations do not impose significant "abnormal returns" during the event window, suggesting markets are relatively efficient. stock buy sell ratings
Statistically rare; often carries "scarcity value" and can have a larger market impact. Summary of Performance Findings
: Historically, "buy" recommendations were overwhelmingly more common (reaching 74% in mid-2000) than "sell" ratings (only 2%), leading to questions about analyst objectivity. The Stock Selection and Performance of Buy-Side Analysts
: Compares the performance of ratings from buy-side analysts (who work for institutional investors) vs. sell-side analysts (who work for brokerage firms).
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