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 European 3-D printer maker voxeljet AG (NYSE:VJET) jumped 13% today after the company released earnings.

So what: Third-quarter revenue jumped 77%, to 3.5 million euros, and net income swung to a profit of $211,000 euros, or 0.11 euros per share. There's still 5.5 million euros in backlog, and management expects revenue of 11 million euros, meaning the fourth quarter would be a slight slowdown from the third. 

Now what: The 3-D printing business is beginning to gain steam, especially in the commercial and industrial setting. As technology improves, the opportunities for a company like voxeljet are tremendous. It's still too expensive for my risk tolerance, but if the company can pick up growth in 2014, shares may become intriguing.