3D Systems (DDD -1.7%) is selling off for the second day in a row. Yesterday, SA's Gray Wolf...
Wednesday, October 24, 2012, 2:11 PM ET3D Systems (DDD -1.7%) is selling off for the second day in a row. Yesterday, SA's Gray Wolf Research offered a lengthy bear case for the 3D printer maker: it argued 3D's organic revenue growth is overstated thanks to acquisitions; that it's losing share after having "significantly underinvested" in R&D relative to Stratasys (SSYS -0.2%) and other rivals; and (citing sources) that 1H results were inflated by channel-stuffing from recently-acquired Z Corp.
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