US stocks open lower as mkts assess US-China trade war risks

Wall Street's main indexes opened lower on Friday as markets assessed the latest escalation in the trade war, with China increasing its tariffs on U.S. imports to 125%.

The Dow Jones Industrial Average fell 100.2 points, or 0.25%, at the open to 39493.42. The S&P 500 fell 12.5 points, or 0.24%, at the open to 5255.56, while the Nasdaq Composite dropped 28.8 points, or 0.18%, to 16358.532 at the opening bell.

The movements came as US government bonds faced selling pressure overnight, sending their yields higher and making US debt more expensive.

On Friday morning, the 10-year Treasury yield was still up at 4.5 percent.

But JPMorgan Chase CEO Jamie Dimon said Friday that US Treasury bonds remained a safe place to invest in a "turbulent" world, even as he acknowledged an impact from recent market volatility.

JPMorgan Chase reported higher profits Friday driven partly by a jump in trading revenues, although Dimon warned of "considerable turbulence" facing the economy.