KEY POINTS
  • Wall Street is surprised over Nvidia's slowing growth in its unit that serves artificial intelligence applications.
  • The company's shares were up 176 percent in the past 12 months through Thursday.
  • That performance ranks No. 1 in the entire S&P 500, way ahead of Micron's 90.5 percent, according to FactSet.

When a company is by far the best performing stock in the entire market, it needs to report perfect results to drive its shares higher.

Nvidia did not do that Thursday, when it posted lackluster sales in a key growth market, a unit that serves artificial intelligence applications.

The chipmaker reported better-than-expected fiscal second-quarter earnings and guidance, but its data center segment sales, where its cards are used for machine learning and artificial intelligence applications, came in at $416 million versus the $423 million Wall Street consensus FactSet estimate.

Its shares opened down 5 percent on Friday, after falling as much as 7 percent in after-hours trading following the report.