Nervousness over North Korea and debt ceiling discussions in Washington sent stock indexes sliding on Tuesday to their largest single-day losses in three weeks.
The Dow Jones industrial average tumbled 234.25 points, or 1.07 percent, to 21,753,31. The Standard & Poor’s 500-stock index lost 18.7 points, or 0.76 percent, to 2,457.85. The Nasdaq composite sank 59.76 points, or 0.93 percent, to 6,375.57.
Each index had been on a multiday upward trend. The market close on Tuesday represented the steepest fall for each gauge since Aug. 17, when the markets were processing news of a terrorist attack in Barcelona and the dissolution of two of President Trump’s business advisory councils.
Coming out of the Labor Day weekend, however, investor jitters stemmed from tensions in Asia. North Korea tested its sixth nuclear bomb on Sunday and drew warnings from the United States of a “massive military response.”
Nikki R. Haley, the United States ambassador to the United Nations, told an emergency session of the United Nations Security Council on Monday that North Korea’s leader, Kim Jong-un, “is begging for war.”
The market is also wary of a potential fight in Congress over raising the debt limit. Treasury Secretary Steven Mnuchin has asked for an increase of statutory borrowing caps by Sept. 29, but it is likely to be met with demands that the increase come with spending cuts or resistance to proposals that it be tied to a Hurricane Harvey aid package.
But Bruce McCain, chief investment strategist at Key Private Bank, said he was not too concerned.
“In all probability, nothing serious will develop out of the Korean issue and in the 11th-and-a-half hour, we’ll be able to extend the debt ceiling,” he said. “It doesn’t stop investors from worrying – it’s part of human nature.”
If anything, the market swoon on Tuesday is evidence that all is well, Mr. McCain suggested.
“Worrying about something relatively unlikely may indicate that the economy is doing pretty well because there’s nothing else there to worry about,” he said.
Events like Mr. Trump’s decision to end the Deferred Action for Childhood Arrivals program have broad social implications but much less influence on investors, Mr. McCain said.
Globally, market performance was mixed. The Seoul KOSPI index deflated 3.03 points, or 0.13 percent, to 2,326.62. In Tokyo, the Nikkei 225 index was down 122.44 points, or 0.63 percent, to 19,385.81. The Hang Seng Index in Hong Kong ticked up slightly to 27,741.35.
In Germany, the DAX index gained 21.5 points, or 0.18 percent, to 12,123.71. But in London, the FTSE 100 metric fell 38.55 points, or 0.52 percent, to 7.372.92.
The 10-year benchmark Treasury yield dropped 8.7 basis points to 2.07 percent as investors sought haven assets.
Benchmark United States crude gained $1.37, or 2.9 percent, to settle at $48.66 a barrel on the New York Mercantile Exchange. Brent crude, used to price international oils, rose $1.04, or 2 percent, to close at $53.38 a barrel in London.