Wall Street shares dropped on Wednesday, with a tech selloff extending into a second day, while a key meeting of central bankers later this week remained in focus for currency and rates traders.The S&P 500 declined 0.

The central bank's annual conference in Jackson Hole, Wyoming, kicks off on Friday, with Chair Jerome Powell expected to speak, remarks that will be closely watched for policy signals. Investors have been pricing in a 25-basis-point rate cut in September, according to data compiled by LSEG.

The day’s action again centered around stocks caught up in the mania around artificial-intelligence technology.

Dow futures slipped slightly on Wednesday as investors adopted a cautious stance ahead of Federal Reserve Chair Jerome Powell’s upcoming remarks at the Jackson Hole Symposium.

The heaviest weight on the market was Nvidia, whose chips are powering much of the move into AI. It sank 3.5%.

Wall Street faded on Tuesday following drops for Nvidia and other stars that have been riding the mania surrounding artificial-intelligence technology.

The S&P 500 slipped 0.4% and is on track for a third straight modest loss after setting its all-time high last week. The Dow Jones Industrial Average was up 8 points, or less than 0.1%, as of 11:50 a.m. Eastern time, and the Nasdaq composite was down 1%.

Shares on Wall Street dropped for a second successive day on Wednesday as weakness in the tech sector persisted while a key meeting of central bankers later this week remained in focus for currency and rates traders.

Wall Street's main indexes declined on Wednesday and the Nasdaq hit a two-week low as a rally in technology stocks cooled and caution prevailed ahead of the Federal Reserve's highly anticipated Jackson Hole symposium later this week After driving much of the market's recovery from the April selloff,