Why Opko Health Stock Stumbled in November

Shares of Opko Health (NASDAQ: OPK) had another poor showing in November, with its stock shedding a whopping 19.5% of its value last month, according to data from S&P Global Market Intelligence. Opko's shares have now lost a stunning 43.4% of their value so far this year. 

Opko's chronic woes stem mainly from the poor commercial performance of its two core value drivers: prostate cancer test 4K Score and the chronic kidney disease drug Rayaldee. In fact, these two key products were a major reason why Opko whiffed on third-quarter revenue by a worrisome 17.5% -- compared to Wall Street's consensus estimate -- last month. 

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Source: Fool.com