India, Aug. 24 -- President Trump is said to be planning to impose more sanctions on Iran. Investors are closely monitoring the geopolitical situation in the Middle East.

In the Asian trading session, oil prices were sharply lower. Brent crude futures tumbled 1.8 percent to $92.72 a barrel.

Gold extended gains. Spot gold was up 0.7 percent at $4,637 an ounce.

Initial signs from the U.S. Futures Index suggest that Wall Street might open lower.

As of 7.55 am ET, the Dow futures were declining 61.00 points, the S&P 500 futures were sliding 12.50 points and the Nasdaq 100 futures were down 157.75 points.

The U.S. major averages all ended Friday in positive territory. The Dow jumped 517.80 points or 1 percent to 53,277.01, the Nasdaq climbe...