Why Did Amarin's Stock Fall Off a Cliff?

On Monday, Amarin (NASDAQ: AMRN) investors got some horrible news. A federal judge in Nevada declared that the company's intellectual property was "obvious" and its drug patent was invalid.

This was a complete shock to many investors, including yours truly. Amarin only has one drug, and now the company has lost the rights to it in the United States. Yesterday I was saying, "This is legalized theft."

Image source: Getty Images.

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Source Fool.com