European shares are projected to open flat to marginally lower on Wednesday, as attention turns to Nvidia's quarterly results and the minutes from the Federal Reserve's May policy meeting.

Nvidia is scheduled to release its first-quarter earnings after the U.S. market closes, with market participants keen to assess the implications of restrictions in China for the artificial intelligence semiconductor leader.

Leading retail companies such as Macy's, Dick's Sporting Goods, and Abercrombie & Fitch will unveil their earnings figures prior to the trading session.

Okta, a cybersecurity company, surpassed estimates for both revenue and earnings in its fiscal first quarter yet maintained its outlook citing economic uncertainties, resulting in its stock falling more than 12 percent in after-hours trading.

PDD Holdings, the parent of Temu, posted first-quarter sales and profits well short of forecasts, highlighting the strain from ongoing Sino-U.S. trade frictions on its operations.

Traders will also examine the Federal Reserve minutes from the May meeting later in the session to gain clearer signals on how officials are navigating monetary policy amid heightened economic uncertainty.

Asian markets finished flat to slightly lower, reflecting investor concerns over rising U.S. debt levels.

A modest pullback in the dollar alongside softer U.S. bond yields supported higher gold prices during Asian trading hours.

Oil prices advanced around half a percent amid worries about possible fresh sanctions on Russia and limited headway in U.S.-Iran nuclear discussions.

U.S. stocks climbed sharply overnight after President Trump postponed threatened 50 percent tariffs on European Union imports and data revealed a sharp rebound in consumer confidence for May following an extended slump.

The Dow surged 1.8 percent and the S&P 500 gained 2.1 percent to end four-day losing streaks, while the Nasdaq Composite jumped 2.5 percent.

European stocks finished higher on Tuesday following upbeat German consumer sentiment figures and French inflation data.

The German DAX rose 0.8 percent to a fresh record high after the government announced plans to increase public investment to 110 billion euros this year to stimulate the economy.

The U.K.'s FTSE 100 added 0.7 percent, France's CAC 40 closed slightly lower, and the STOXX 600 advanced 0.3 percent, extending Monday's gains.

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