U.S. stock futures were mixed on Wednesday, after a record close on Tuesday, as the Dow Jones and S&P 500 advanced but the Nasdaq 100 fell.

U.S. stock futures were mixed on Wednesday, after a record close on Tuesday, as the Dow Jones and S&P 500 advanced but the Nasdaq 100 fell.

(Bloomberg) -- US stocks struggled to build on record gains as growing strains on the ceasefire between the US and Iran sent oil prices higher for a third straight day.