What's one of the best ways to turbocharge the stocks of small technology companies? Reveal significant investments in those companies by a giant technology leader. That's exactly what happened last week as Nvidia (NASDAQ: NVDA) disclosed stakes in two small artificial intelligence (AI) companies.

Chip giant Nvidia (NVDA) remains central to most investors’ view of the stock market. That’s partly due to the company’s status as one of the largest publicly traded businesses and its weighting in most major indices.

The chipmaker and AI specialist just sold several of the companies in its portfolio. Should investors follow suit?