By Saumya Vaishampayan 

U.S. stocks ended marginally lower, with a drop in DuPont Co. shares weighing on the Dow Jones Industrial Average.

The Dow slipped 7.74 points, or less than 0.1%, to 18060.49, and the S&P 500 index lost 0.64 point to 2098.48. Utilities stocks in the S&P 500 fell the most, down 1.1%. Technology stocks in the index rose 0.5%, leading gainers.

The Nasdaq Composite added 5.50 points, or 0.1%, to 4981.69.

The Dow was pressured by DuPont Co., whose shares fell 6.8%. Without DuPont, the Dow would have ended slightly higher. DuPont defeated the campaign by Nelson Peltz and his Trian Fund Management L.P. to land board seats, as shareholders re-elected all of DuPont's sitting directors.

Stocks rose after the opening bell, but gave up most gains by midmorning. Moves were muted for the rest of the session. Wednesday's trading marked a continuation of back-and-forth action in the stock market.

"We've been in a 3% range for the last five months" on the S&P 500, said Jeffrey Yu, head of single-stock derivatives trading at UBS. "Investors who are on the higher end of their equity allocation are unlikely to continue to add to their positions until the market breaks out to new highs," he added.

The S&P 500 ended 0.9% below its most recent record, hit on April 24.

Eurozone data indicated a modest economic recovery is in place. Eurozone growth in the first three months of the year expanded at its fastest pace in almost two years, data showed Wednesday. It was the first time since the first half of 2010 that all four of the region's largest economies recorded growth. European stocks, however, ended lower as the euro rallied. Germany's DAX fell 1.1% and France's CAC 40 lost 0.3%.

Investors are watching for signs that economic growth is picking up, both in the U.S., after a slow start to the year, and overseas. Wednesday's eurozone data suggested the European Central Bank's stimulus program is helping jump-start growth. Strong economic growth brightens the outlook for corporate profits and stock-market returns.

"If you put all the data points together, coupled with stimulus coming out from central banks globally, it suggests that global demand should pick up," said Quincy Krosby, market strategist at Prudential Financial. "If demand picks up, even at the margin, it's a net positive for multinationals," she added.

In U.S. economic news, the Commerce Department said Wednesday U.S. retail sales were flat in April at $436.8 billion. Economists surveyed by The Wall Street Journal had expected a 0.2% increase in April. Investors said that while Wednesday's retail sales report was disappointing, it did little to shift their full-year views. Many of the factors weighing on growth at the start of the year, such as the West Coast port strike and harsh weather, are likely to prove temporary.

"If our view here is right, and pent-up demand leads to stronger U.S. growth in the back half of this year, you can still end up with a strong year of global growth, especially if Europe continues on this path," said Joseph Tanious, investment strategist for Bessemer Trust, which oversees about $105 billion. "That ultimately bodes well for risk assets, " he added. Mr. Tanious said he expects stocks to gain this year, but at a slower pace than in recent years.

Matthew Kaufler, who oversees about $2 billion as a portfolio manager at Federated Investors, said he recently added to his overweight position in the materials sector, part of a play on lower natural-gas prices.

While those prices have gained recently, they are down 38% from last summer. Natural gas is a main ingredient in many of these companies' products, and so companies in the materials sector often enter into agreements to buy the commodity at a fixed price, Mr. Kaufler said. "Those contracts were entered into at a time when natural gas was significantly higher...and for some companies are now expiring, so they're going to enjoy the benefit of much lower gas prices," he said.

Asian stocks were mixed Wednesday. Japan's Nikkei Stock Average rose 0.7%, while Hong Kong's Hang Seng Index lost 0.6%. The Shanghai Composite fell 0.6%.

The yield on the 10-year Treasury note rose to 2.283% from 2.256% on Tuesday. Yields rise as prices fall.

In commodity markets, crude-oil futures fell 0.4% to $60.50 a barrel. Gold futures rose 2.2% to $1218.40 an ounce.

In corporate news, pipeline giant Williams Cos. said it would buy up the portion of subsidiary Williams Partners that it doesn't already own in a $13.8 billion all-stock deal. Shares of Williams Cos. rose 6.2% and those of Williams Partners jumped 23%.

Danaher Corp. intends to break itself in two separate companies next year. As part of the breakup, it will acquire Pall Corp. for $13.6 billion. Danaher shares rose 1.6% and Pall shares gained 4.4%.

Write to Saumya Vaishampayan at saumya.vaishampayan@wsj.com

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