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 Regeneron Pharmaceuticals (Nasdaq: REGN) surged 10% on Monday after the U.S. Food and Drug Administration approved its drug to treat the wet form of age-related macular degeneration.   

So what: The approval officially puts Regeneron in a prime market position, as its drug, Eylea, can be injected less frequently and costs 5% less than the current standard, Roche's Lucentis. When you couple that perceived edge with the fact that incidents of the disorder are only expected to grow as baby boomers age, it's no surprise that the shares are jumping on the news. 

Now what: Eylea is expected to hit peak sales of about $1 billion in roughly 10 years as the drug's usefulness in other areas grows. As of now, however, Regeneron only has one other marketable product and is still unprofitable. Today's news certainly bodes well for the company, but with most of its products still very much in the development stage, Regeneron remains best-suited for speculative, less risk-averse types.

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