KEY POINTS
  • Chipmaker Advanced Micro Devices is the best-performing tech stock of the year, up 85 percent so far.
  • The stock slid with the rest of the tech sector Monday, falling as much as 11 percent before closing down 9.5 percent.
  • AMD competitor Nvidia also suffered a steep drop.
Lisa T. Su, CEO of Advance Micro Devices.

Advanced Micro Devices, the year's best-performing technology stock, got pummeled Monday as the entire tech sector took a nosedive.

Shares of AMD tumbled as much as 11 percent on Monday to a low of $18.80, the biggest decline among the 66 companies in the S&P 500 tech index. AMD closed down 9.5 percent, well below the Information Technology Index, which closed down 3.5 percent.