By Saumya Vaishampayan 

The Dow Jones Industrial Average rose Wednesday, boosted by stronger-than-expected results at Walt Disney Co.

The Dow gained 61 points, or 0.4%, to 17727.

Walt Disney's shares rallied 8.2% and contributed about 49 points to the Dow's overall gain. The Dow is a price-weighted index which tends to be influenced by pricier components such as Disney.

Action was muted on other indexes. The S&P 500 was nearly flat at 2050, while the Nasdaq Composite Index added three points, or 0.1%, to 4730.

Wednesday's trading marked a continuation of choppy price action in the stock market. The Dow has moved by more than 1% in either direction in the six sessions ended Tuesday.

Traders said stock moves in recent weeks have been driven by bets on indexes rather than on individual stocks. That comes amid an increased focus on moves in oil prices and political developments overseas, such as the new Greek government's talks with its creditors, that are overshadowing fourth-quarter earnings, they said.

"It seems like there's an inordinate amount of uncertainty in the world, " said Michael Fredericks, portfolio manager of the BlackRock Multi-Asset Income Fund, which has $10.2 billion under management. "It's hard to have a lot of conviction."

Crude-oil futures fell 5.1% to $50.37 a barrel, following four straight sessions of gains. Energy stocks on the S&P 500 fell 1.2%, marking the biggest sector decline.

"We're in a period where the market is really thrashing around," said Jeff Morris, head of U.S. equities at Standard Life Investments. "It has to do a balancing act between those portions of the U.S. economy showing genuine strength and recovery and international influences," such as global growth concerns, he added.

Investors continued to watch international developments, especially in Greece. Greece's new leaders are trying to reach an agreement about the country's hefty debt pile. Greek Prime Minister Alexis Tsipras said Wednesday his discussions with European Union leaders were headed in a good direction, though one of the bloc's top officials warned that negotiations would still be tough.

European stocks rose, with France's CAC 40 up 0.4% and Germany's DAX 30 gaining 0.2%.

China's central bank on Wednesday cut the amount of deposits set aside by commercial banks in case of financial trouble, taking a major step to boost bank lending. The move is part of a continued effort to kick-start growth.

Back in the U.S., consumer discretionary stocks rose the most on the S&P 500, up 0.9%.

Health-care stocks on the S&P 500 fell 1%. Merck & Co. said its sales fell in the fourth quarter as a stronger U.S. dollar and patent expirations weighed on results. Shares fell 3.6%.

In other corporate news, General Motors Co. said fourth-quarter profit surged 91%, beating analyst expectations. The company said it plans to boost its dividend starting in the second quarter. Shares rose 4.6%.

Staples Inc. agreed to buy Office Depot Inc. for $6.3 billion . The two companies have roughly 4,000 stores and they projected annual sales of more than $39 billion. Shares of Staples fell 10%, while those of Office Depot rose 1.8%.

In economic news, private payrolls increased by 213,000 in January, according to a report compiled by payroll processor Automatic Data Processing Inc. and forecasting firm Moody's Analytics. Economists surveyed by The Wall Street Journal had expected payrolls to increase by 240,000.

Still, the overall employment trend remains positive, investors said.

"The economy is expanding, the private sector is adding jobs, and that's good news" for stocks, said Matthew Kaufler, who oversees about $2 billion as a portfolio manager at Federated Investors. "With the economy on firmer footing, inflation expectations subdued, corporations returning capital aggressively to shareholders, those all point to an attractive environment for equities," he added.

The ADP report is often viewed as an indicator for Friday's closely watched jobs report, which is expected to show the economy added 237,000 jobs in January, according to economists surveyed by The Wall Street Journal.

In other markets, gold futures rose 0.4% to $1265.00 an ounce.

Treasury prices fell, pushing the yield on the 10-year note up to 1.822% from 1.781% on Tuesday.

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

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