By Chris Dieterich 

U.S. stocks rebounded on Wednesday from losses suffered amid economic growth concerns.

The Dow Jones Industrial Average added 40 points, or 0.2%, to 16760, bouncing back after dropping as many as 56 points earlier in the session.

The S&P 500 gained two points, or 0.1%, to 1937. The Nasdaq Composite Index was nearly flat, slipping less than 0.1% to 4385.

Sputtering German industrial data, combined with a gloomy assessment of growth by the International Monetary Fund, has quickly darkened the global economic outlook, particularly in Europe, where stocks continued to sink. The Stoxx Europe 600 slid 0.9% Wednesday, while Germany's DAX dropped 1%.

"This is a growth scare," said Rick Fier, director of execution services at Conifer Securities in New York. "It's fear about where is there growth."

Stocks have seen big swings in recent days, halting a mostly unhindered rise for U.S. stocks since the start of this year. The Dow plunged nearly 273 points on Tuesday in its biggest one-day slide since the end of July, marking its third move of at least 200 points in the past five trading days.

The Dow has fallen 3.2% from its Sept. 19 record high.

"It's definitely a selloff like we haven't had in a while," said Dave Rovelli, senior managing director of equity trading at Canaccord Genuity.

Investors are also fretting over potential market disruptions stemming from Federal Reserve policy changes. The Fed is expected to end its long-running monthly bond-buying program this month. Fed officials will release the minutes of their September policy meeting at 2 p.m., which investors will parse for clues about when the central bank may raise interest rates.

Energy stocks on the S&P 500 led the market lower as prices for crude oil continued to tumble. U.S. crude-oil futures lost 1.8% to $87.23 a barrel, a nearly 18-month low.

The rapid decline in the yield on benchmark 10-year Treasury notes, which edged lower to 2.342% from 2.352% late on Tuesday, supplied further evidence that investors are seeking safety from shrinking economic growth. Bond yields fall as prices rise. The 10-year yield rose above 2.6% in the middle of last month before reversing lower.

Canaccord's Mr. Rovelli said that traders are also fixated on so-called technical levels, or pivot points for major benchmarks, that often provide signals as to whether certain markets are headed higher or lower in the short term.

In focus for many on Wednesday was the Russell 2000 index of small company shares. Mr. Rovelli said further declines in the Russell 2000 could weigh on the broader market as traders add to their protective market positions. "It's a very technical selloff," Mr. Rovelli said.

The Russell index dropped 0.7% on Wednesday, much larger than the broader market, extending a 3% weekly decline.

Beyond economic readings and Fed comments, investors will chew over corporate earnings in the weeks ahead. Aluminum producer Alcoa will report after the closing bell, a report that marks the unofficial start to the corporate earnings season. Alcoa fell 1.8%.

Costco Wholesale rose 2.2%, the biggest gainer on the S&P 500, after the wholesale retailer posted profit and sales for the most recent quarter that topped expectations.

Yum Brands rose 1.4% after the fast-food company reported weak sales in China, but strong revenues at KFC and Taco Bells outside of China.

Monsanto added 0.3% even after the agricultural biotechnology company reported a bigger loss in the most recent quarter than expected.

Gold futures slipped 0.5% to $1,206.70 an ounce. The dollar rose against the euro and yen.

In Asia, the Nikkei 225 fell 1.2%, while Hong Kong's Hang Seng declined 0.7%.

Elsewhere, action-sports camera maker GoPro fell 2.8% after analysts at Piper Jaffray cut the stock's rating to neutral from overweight.

GT Advanced Technologies moved higher for the second session in a row, surging 27%. The manufacturer swooned 90% on Monday after filing for bankruptcy protection.

Write to Chris Dieterich at christopher.dieterich@wsj.com

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