As I understand it, the category "tech" was invented by stock traders. The applicable definition of "tech" company is a company whose share price movements corr

As I understand it, the category "tech" was invented by stock traders. The applicable definition of "tech" company is a company whose share price movements correlate with the share price movements of other "tech" companies, which in turn tends to depend on how stock traders view the company, so the definition is circular in at least two ways. But it's probably still a useful concept. For stock traders.