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The downing of a passenger plane flying over Ukraine rattled U.S. financial markets Thursday, deepening a slide set off by a batch of disappointing company earnings and a weak home construction report.

All three major stock indexes ended lower for the first time in a week, but remained near record highs and positive for the year.

Ukrainian officials said a Malaysia Airlines passenger plane carrying 295 people was shot down over war-torn eastern Ukraine, although both the government and pro-Russia separatists fighting in the region denied responsibility. The situation raised concerns of wider geopolitical instability and an escalation of tensions between Russia and the West.

Investors responded by seeking refuge in U.S. government bonds. The yield on the 10-year Treasury note fell to its lowest level since May. Gold and oil prices rose.

SanDisk, AutoNation, Yum Brands and Mattel were among the biggest decliners after reporting earnings or profit forecasts that disappointed investors. Airline and homebuilder stocks also fell sharply.

A pair of government reports pointed to an uneven U.S. recovery. The number of people seeking unemployment benefits fell last week, but home construction fell in June to the slowest pace in nine months, clouding the outlook for the housing recovery.

Homebuilders slumped on the news. M/I Homes led the decline, tumbling $1.38, or 5.8 percent, to $22.37.

All told, the Standard & Poor’s 500 index fell 23.45 points, or 1.2 percent, to 1,958.12. The Dow slid 161.39 points, or 0.9 percent, to 16,976.81. The Nasdaq composite sank 62.52 points, or 1.4 percent, to 4,363.45.

The yield on the 10-year Treasury note fell to 2.46 percent from 2.53 percent late Wednesday. Benchmark U.S. crude oil for August delivery jumped $1.99 to $103.19 in New York. Gold surged $17.10 to $1,316.90 an ounce.

All 10 sectors in the S&P 500 declined, led by energy stocks.

SanDisk fell the most of the 500 stocks in the index, losing 13.6 percent after the flash memory maker issued a disappointing outlook. The stock fell $14.62 to $93.21.

Sherwin-Williams bucked the trend, ending up as the biggest gainer in the index. It rose $9.22, or 4.6 percent, to $210.95.

Despite Thursday’s decline, stocks remain near record territory.

The Dow closed at a record high on Wednesday, its second this month, and the S&P 500 is hovering near its most recent all-time high of 1,985.44 set on July 3.

That may have encouraged investors to sell some of their stock holdings Thursday, said Darrell Cronk, deputy chief investment officer for Wells Fargo Private Bank.

“It’s more of some position-squaring and a little bit of profit-taking over the next couple of days as we continue to set new highs,” Cronk said.