U.S. stock futures were lower on the final trading day of the week, with investors monitoring attacks on oil tankers in the Gulf of Oman and reacting to economic data out of China.

As of 3:20 a.m. ET, Dow futures were 19 points lower, indicating a slightly lower open of 25 points. S&P 500 futures were barely changed while Nasdaq futures were in negative territory.

Market players are closely watching geopolitical events, with attacks on oil tankers in the Middle East giving oil prices a boost. Brent crude climbed 0.4% to $61.57 a barrel, while WTI crude was up 0.1% at $52.33.

U.S. data also looms, with traders looking out for upcoming retail sales and industrial production data for May, as well as the consumer sentiment index for June.

Source : CNBC