The stock market is drifting in mixed trading after several artificial-intelligence stocks veered back up their roller-coaster ride, while Apple dropped after hiking prices on many of its products.

US stocks drifted through a mixed day of trading after resuming following a three-day weekend, with SpaceX falling again.

Stocks fell on Wall Street as a sell-off in big technology companies spread from Asia back to the US over worries about potentially higher interest rates by the end of the year.