By Sam Meredith, CNBC–

U.S. stock index futures were slightly lower Friday morning.

At around 02:30 a.m. ET, Dow futures dipped 58 points, indicating a negative open of more than 41 points. Futures on the S&P and Nasdaq were both marginally lower.

The moves in pre-market trade come after China posted its weakest growth in nearly three decades, as the U.S.-China trade war hit demand at home and abroad.

The world’s second-largest economy grew 6% in the third quarter, less than expected, and its weakest pace of expansion in over 27 years.

The downbeat data appeared to offset a global lift in market sentiment on Thursday, after the U.K. and European Union struck a long-awaited Brexit deal.

British and EU officials reached the agreement after successive days of late-night talks and almost three years of tense discussions.

British Prime Minister Boris Johnson will now attempt to persuade U.K. lawmakers to back his agreement, ahead of what is expected to be a knife-edge vote on Saturday.

Earnings

Back in the U.S., American Express, Coca-Cola and State Street are among some of the companies set to report earnings before the opening bell.

There are no major economic reports scheduled on Friday.