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Science  11 Jan 2013:
Vol. 339, Issue 6116, pp. 139
DOI: 10.1126/science.339.6116.139

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When scientists reported at a 2005 meeting that an experimental drug for stroke showed promise, investors in the small biotech company that had developed the drug expected to see a jump in its stock price. Instead, the stock price fell by 23%, shedding almost $100 million in value in less than a week. What happened?