Influential short-seller warns of bubble in 3D printers

Makers of 3D printers in recent years have turned an evolving technology used by manufacturers for over two decades toward consumers, offering the prospect of producing everything from toys to tools in the home, and sending their share prices soaring.

Citron Research, run by California-based investor and notable short-seller Andrew Left, issued a report on Thursday accusing 3D Systems' chief executive Abe Reichental of exaggerating advances in 3D printing and contributing to a bubble in the shares of 3D printing companies.