Shares of 3D Systems Corporation (NYSE:DDD) are significantly down in early trading as a result of a reduction in fourth quarter earnings estimate. The 3D printer company now estimates profits in the fourth quarter at a range of $0.83 to $0.87 per share compared to the prior forecast range of $0.93 to $1.03 per share. DDD cut its full-year 2014 earnings estimate below analyst expectations. The company cited increased spending on advertising and soft demand for printers and parts as reasons for the forecast cut. People are opting for less expense printers as 3D printers cost around $1200 based on the company's own website. (Image source: 3ders.org)