Piper Jaffray analyst Troy Jensen recommends buying shares of Stratasys (SSYS) after the company negatively preannounced results for Q3. The poor quarter reflects the challenging macroeconomic environment, weak demand for capital equipment by customers and the overall 3D printing industry continuing to work off the excess capacity, Jensen tells investors in a research note. He continues to believe the company's growth will return in 2016. The analyst keeps an Overweight rating on Stratasys with a $39 price target. The stock is down $6.01, or 19%, to $24.86 in pre-market trading. Its peers include 3D Systems (DDD), voxeljet (VJET) and ExOne (XONE).