Why Clovis Oncology Inc. Shares Crashed
Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.
What: Shares of Clovis Oncology on Monday have lost 8% of their value, after briefly falling by double digits, following weekend revelations that the company's potential blockbuster lung cancer drug may carry more risks than expected.
So what: Investors had been flooding into Clovis following its announcement that it would present data at the American Society of Clinical Oncology meeting. This presentation took place over the weekend, and media reports indicate that the key takeaway was that some patients in Clovis' phase 1/2 study of CO-1686 must now take medication to counteract high blood pressure caused by the drug. This information was buried in an otherwise-positive mound of data, which noted a 58% objective response rate in 40 evaluable patients, of the 81 evaluable patients from whom data was available at the ASCO presentation.
High blood sugar, or hyperglycemia, is typically associated with diabetes, and was observed in 22% of patients taking CO-1686. These patients are taking metformin, which is commonly prescribed to lower blood sugar levels in Type 2 diabetics, but "three or four" patients had hyperglycemia that was severe enough to require regular insulin injections, according to Clovis CEO Pat Mahaffay, who spoke at a company event on Saturday night.
Now what: Clovis has been in a tight race with the much larger AstraZeneca to develop a similarly targeted lung cancer drug, and these revelations are clearly bad news for Clovis' hopes to outmatch its competitor on efficacy and safety. The drugs are essentially neck and neck in trial efficacy, according to other presentations made at the ASCO meeting, and both have seen adverse effects. At the moment, it appears that neither drug has an indisputable edge, which undermines Clovis' earlier claims to offer a superior treatment to AstraZeneca. Without that edge, Clovis' bull case is significantly weakened, and its future upside is in greater doubt.
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The article Why Clovis Oncology Inc. Shares Crashed originally appeared on Fool.com.Alex Planes has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.
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