U.S. stock index futures jumped on Tuesday, after President Donald Trump rolled back his threat of steep tariffs against the EU and tensions between the United States and the European bloc cooled, as traders returned after the Memorial Day break. .N

** Prothena Corporation PLC <PRTA.O>:BUZZ - Drops as Jefferies downgrades to 'hold' after drug fails trial nL6N3RZ09X

** CoreWeave Inc <CRWV.O>:BUZZ - Barclays hikes CoreWeave's PT to Street high; stock climbs nL3N3RZ0F1

** United States Steel Corp <X.N>:BUZZ - Rises after Nippon Steel's takeover bid gets Trump support nL6N3RZ0C8

** Newmont Corp <NEM.N>:

** Gold Fields Ltd <GFI.N>:

** AngloGold Ashanti PLC <AU.N>:

** Sibanye Stillwater Ltd <SBSW.N>:

BUZZ - Gold miners fall as US dollar regains lost ground nL3N3RZ0KX

** Southwest Airlines Co <LUV.N>:BUZZ - Rises after Jefferies upgrades to "hold" nL3N3RZ0NF

** Chevron Corp <CVX.N>:

** Exxon Mobil Corp <XOM.N>:

** ConocoPhillips <COP.N>:

** Occidental Petroleum Corp <OXY.N>:

BUZZ - Energy companies rise as trade war concerns ease nL3N3RZ0N5

** PDD Holdings Inc <PDD.O>:BUZZ - Falls on Q1 revenue miss nL3N3RZ0OO

** Informatica Inc <INFA.N>:BUZZ - Jumps on report of Salesforce nearing $8 billion takeover nL3N3RZ0PJ

(Rajarshi Roy and Apratim Sarkar)

((Rajarshi.Roy@thomsonreuters.com))