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 3D Systems (NYSE: DDD) dropped today by as much as 11% after the company reported earnings, but has recovered most of those losses.

So what: Revenue for the second quarter soared 52% up to $83.6 million, with non-GAAP earnings per share of $0.27. Sales fell slightly short of analyst expectations. The growth was primarily driven by a 112% increase in printer units sold, while its backlog increased on strong demand.

Now what: The company trades at a premium valuation so investors may have been expecting more and are disappointed that sales fell slightly short. Additionally, CEO Abe Reichental said the company faces lingering "economic uncertainties," but should still benefit from R&D spending by its customers. 3D Systems is reaffirming its full-year guidance, with revenue forecast to be between $330 million and $360 million and adjusted earnings per share of $1.00-$1.25.

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