By Dan Strumpf 

Stocks finished mostly lower Monday, reversing earlier gains, after a slide in oil prices prompted heavy selling in energy stocks and spurred renewed fears over the health of the global economy.

The Dow Jones Industrial Average fell 24.28 points, or 0.1%, to 17366.24, wiping out modest gains that earlier pushed the index to a fresh intraday record of 17410.65. Energy stocks lost the most ground, with Dow components Chevron down 2.6% and Exxon Mobil shedding 1.5%.

The pullback followed an afternoon selloff in the oil market after Saudi Arabia announced it would cut the price of its crude to the U.S., suggesting the kingdom is aiming to undercut once-thriving U.S. producers. Crude-oil futures shed 2.2% to settle at $78.78 a barrel, their lowest finish since June 2012. Prices have fallen 27% from recent highs in June.

The S&P 500 slipped 0.24 point to 2017.81. The Nasdaq Composite Index rose 8.17, or 0.2%, to 4638.91.

While falling oil prices are generally seen as an economic boon, investors are concerned that the deep slide of the last few months could spell deflation, or declines in prices throughout the economy that can spell economic trouble, said Viren Chandrasoma, managing director of equity trading at Credit Suisse.

"It's essentially a reading on global growth, and that's why I think it's making people nervous," he said of the drop in oil prices. "The economic numbers are still looking good, but if oil keeps going lower, you look at it from a macro implication and it's deflationary."

The afternoon slide in oil prices jolted Monday's otherwise quiet market that saw many investors sitting tight ahead of headlines expected later in the week. On Tuesday, voters will go to the polls for midterm elections, while on Friday the closely watched monthly employment report is expected to show another month of solid jobs gains by U.S. employers.

Despite Monday's slide, the S&P 500 remains up 9.2% so far this year. Last week, both the Dow and S&P 500 surged to record highs after the Bank of Japan announced it would expand its recent stimulus efforts. Such measures by central banks globally have been credited with boosting risky assets such as stocks this year.

Meanwhile, investors remain cheered by data suggesting the U.S. economy remains on solid footing. On Monday, the Institute for Supply Management said its main gauge for the factory sector rose to 59 last month from 56.6 in September, besting expectations for a reading of 56.

"There are things going on that favor the U.S. over the rest of the world," said Paul Zemsky, who helps manage about $30 billion in global investments for Voya Investment Management. "Growth is getting better...The U.S. earnings situation, we're coming off a great quarter." Mr. Zemsky said he holds a sizable position in U.S. stocks, and favors domestic stocks over bonds.

Data on Europe's manufacturing sector failed to impress. The Stoxx Europe 600 fell 0.8% after data showed only a modest pickup in eurozone manufacturing activity in October.

Friday's jobs report is expected to show U.S. employers added 233,000 jobs last month, building on 248,000 new jobs added in September, according to a Wall Street Journal survey of economists. The unemployment rate is expected to remain steady at 5.9%.

Many investors still expect the stock market to post gains through the remainder of the year. Gordon Charlop, managing director at Rosenblatt Securities, said managers are under pressure to show strong performance for the next few months as they wind down the year, which means cash that remains on the sidelines is likely to be put to work.

"The idea of waiting to buy on the dip--time is winding down on that move," he said.

Corporate mergers announced Monday lifted some shares. French advertising company Publicis Groupe SA said it had entered a definitive agreement to buy U.S.-based Sapient for $25 a share. Sapient shares surged 42%.

Health-care diagnostics company Laboratory Corp. of America Holdings said Monday it agreed to buy Covance Inc. in a deal worth about $6.1 billion. Covance also reported results for the most recent quarter, including better-than-expected revenue that rose 3.7% to $671 million. Laboratory Corp. shares fell 7.4%, while shares of Covance jumped 26%.

Sysco Corp. shares fell 2.7% after the food-services distributor said fiscal first-quarter earnings fell 2.4% in part on expenses related to its pending acquisition by U.S. Foods. The company said it doesn't expect the deal to close before the first quarter of next year.

Write to Dan Strumpf at daniel.strumpf@wsj.com

Sysco (NYSE:SYY)
Historical Stock Chart
From Apr 2024 to May 2024 Click Here for more Sysco Charts.
Sysco (NYSE:SYY)
Historical Stock Chart
From May 2023 to May 2024 Click Here for more Sysco Charts.