California-based Nanometrics has been around 25 years. They've had no recent press releases or other noteworthy behavior to speak of. But, on Wednesday, their stock value shot up 10 percent. Why? Because of an overall surge of interest in nanotechnology. The only problem is... Nanometrics has nothing to do with nanotechnology. They just happen to have the stock symbol "NANO". So, any readers accidentally invest in fishing nets five years ago?