U.S. stock index futures turned slightly lower on Tuesday morning.

At around 05:30 a.m. ET, Dow futures dipped 22 points, indicating a negative open of more than 8 points. Futures on the S&P and Nasdaq were both slightly lower.

Market focus is largely attuned to global trade developments after China’s vice foreign minister said that Beijing and Washington had achieved some progress in their trade talks.

The world's two largest economies secured a limited trade deal last week, in an attempt to end a protracted dispute that has battered financial markets and hammered global growth.

Source : CNBC