It's been quite the year for artificial intelligence (AI) chipmaker Nvidia ( NVDA 4.57%), which has seen its stock rise more than 161% year to date. Over the last five years, Nvidia's stock is up by more than an astounding 2,560%.

Key Takeaways Nvidia shares have exploded this year, but William Blair analysts say there's still an upside opportunity.The firm believes Nvidia has a one- to two-year lead on its competitors in artificial intelligence.

It’s Fed decision day—and it'll be difficult for the chip maker's shares to make gains until investors have more clarity about the central bank's next move.