Industries change, and companies either change with them or get left behind. For years, IPG Photonics ( IPGP ) was the technology leader in the then-novel field of industrial fiber lasers. While the company once enjoyed robust margins, rivals caught up, shrinking prices andAnalyst’s Disclosure:I/we have no stock, option or similar derivative position in any of the companies mentioned, and no plans to initiate any such positions within the next 72 hours. I wrote this article myself, and it expresses my own o ...