U.S. stock futures dipped Wednesday after Iran fired missiles at Kuwait and Bahrain, threatening the index's longest run since 1995

Crude oil surged nearly 8% – its best day since April 2 – after US strikes on Iran and Tehran's retaliation, stalling the S&P 500's rally even as software stocks soared.

(Bloomberg) -- US equity-index futures edged lower and oil held gains as efforts to revive a peace deal with Iran showed little progress.