3D-printing stocks tank after 3D Systems lowers its earning expectations

After 3D Systems lowered its expectations for earnings per share for the last quarter of 2013 this morning, its stocks took a dive, bringing fellow 3D printing companies like Stratasys and Voxeljet down as well. 3D Systems was down 27.4 percent this morning and has since bounced back a little bit to being down 15.07 percent, closing at $64.34. The company lowered its expectations after higher than expected spending on research and development, sales and marketing expenses and acquisition concentration costs.