Stocks opened lower and repeatedly switched between small gains and losses before falling in the last hour of trading. Along with technology companies, health care and energy stocks and retailers also fell as the companies that have led the U.S. market higher this year continued to struggle.
Defense contractors L3 and Harris made the biggest gains on the S&P 500 after announcing a deal to combine. Smaller companies fared better than the rest of the market and finished broadly higher.
The S&P 500 index lost 16.34 points, or 0.6 percent, to 2,750.79. The Dow Jones Industrial Average retreated 89.44 points, or 0.4 percent, to 25,250.55. The Nasdaq composite skidded 66.15 points, or 0.9 percent, to 7,430.74. The Russell 2000 index of smaller-company stocks added 6.42 points, or 0.4 percent, to 1,553.09.
The S&P 500 lost 4.1 percent last week, its third weekly loss in a row and its biggest since late March, as investors worried about rising interest rates and trade tensions between the U.S. and China.
The technology companies that have led the market higher in recent years, including some of the world’s most valuable companies, continued to decline. Apple gave up 2.1 percent to $217.36 and chipmaker Nvidia slipped 3.4 percent to $235.38.
Bond prices edged lower. The yield on the 10-year Treasury note rose to 3.16 percent from 3.14 percent late Friday.
Rising bond yields often lead to losses for high-dividend companies because many investors think of them as alternatives to bonds. That pattern hasn’t held up in the last few days as investors have been looking for relatively safe picks on the stock market.
Germany’s DAX jumped 0.8 percent and the FTSE 100 in Britain rose 0.5 percent. France’s CAC 40 fell less than 0.1 percent.
Japan’s benchmark Nikkei 225 dipped 1.9 percent and the South Korean Kospi edged down 0.8 percent. Hong Kong’s Hang Seng fell 1.5 percent.
Global stock indexes have been struggling this year as investors move money to the U.S. and out of Europe and Asia in response to faster economic growth in the U.S. and rising trade tensions. The losses the last few weeks for global markets have made it even worse.
The Hang Seng index in Hong Kong has fallen 22 percent since early January, meeting Wall Street’s definition of a “bear market,” or a decline of 20 percent from a recent peak. A number of other indexes have fallen at least 10 percent, known as a “correction.”
U.S. crude rose 0.6 percent to $71.78 a barrel in New York. Brent crude, the standard for international oil prices, added 0.4 percent to $80.78 a barrel in London. Natural gas prices continued to surge as the weather in the U.S. grew colder. They rose 2.6 percent to $3.24 per 1,000 cubic feet and have climbed almost 8 percent in October to reach their highest price since January.
Wholesale gasoline edged up 0.1 percent to $1.94 a gallon and heating oil added 0.2 percent to $2.33 a gallon.
In another sign investors were nervous about stocks, gold rose 0.7 percent to $1,230.30 an ounce and silver picked up 0.6 percent to $14.73 an ounce. Copper lost 0.4 percent to $2.79 a pound.
The dollar fell to 111.88 yen from 112.01 yen. The euro rose to $1.1584 from $1.1563.