Why Amgen's Q1 Results Disappointed Investors

Amgen (NASDAQ: AMGN) has taken investors on a roller coaster ride over the last 12 months. The stock has experienced multiple swings -- up and down -- of 10% or more. And now it looks like another downturn could be on the way. 

The company announced its first-quarter results after the market closed on Tuesday. Investors weren't happy with Amgen's report, and the biotech stock fell nearly 4% in after-hours trading. Here are the highlights from Amgen's first-quarter update.

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Source Fool.com