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  • Thumbnail for Trading biopharmaceutical stocks after catastrophic one-day declines
    Trading biopharmaceutical stocks after catastrophic one-day declines by Ward, Daniel Elliott

    This thesis analyzes volatility of small capitalization biopharmaceutical stocks after significant one-day price drops. Stock performances after one-day declines of ten percent or greater for companies in the NASDAQ Biotechnology Index were gathered from 2011-2012 to test for evidence of market overreaction. While no substantial evidence was found for overreaction, long-term performance suggested that traders underreact during the initial stock drop, with underreaction most prevalent in stocks seeing an initial one-day drop of at least twenty percent. Overreaction only appeared present when companies saw a stock drop due to negative pipeline results.