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(Reuters) - Wall Street struggled to hold on to early gains on Monday as losses in industrial stocks including Boeing and Caterpillar more than offset gains in chipmakers and technology companies.

Traders work on the floor of the New York Stock Exchange, (NYSE) in New York, U.S., March 7, 2018. REUTERS/Brendan McDermid

Many of the United States’ big manufacturers have suffered since U.S. President Donald Trump announced plans to impose tariffs on steel and aluminum imports, a move that could increase their costs while hampering sales abroad.

But the half percent fall in the Dow Jones Industrial Average followed a near 2 percent gain for New York’s main indexes on Friday after data showed sluggish wage growth in February, easing concerns the Federal Reserve might raise interest rates swiftly.

“It is a quiet day in terms of news and you still have the tariff fears kind of circling in the markets,” said Michael Antonelli, managing director, institutional sales trading at Robert W. Baird in Milwaukee.

Trump softened his stance last week by exempting Canada and Mexico, but negotiations are ongoing as the European Union also seeks to exempt itself from the tariffs.

The tech-heavy Nasdaq, by contrast, gained around 0.4 percent, helped in part by what traders read as further signs of official disapproval of Broadcom’s $117 billion bid for U.S. graphics chipmaker Qualcomm.

The U.S. Treasury said in a letter to Singapore-based Broadcom that it had violated a Treasury order by not giving sufficient notice to a national security panel of its plans to redomicile in the United States.

“It’s ... the government coming out and saying that it is leaning towards not allowing this merger to go through,” said Kim Forrest, senior equity research analyst at Fort Pitt Capital Group in Pittsburgh.

“This is a real change, because under the Republican administration, it is generally thought of as less regulatory, less hand-on approach to this sort of this and this is the very opposite.”

Broadcom (AVGO.O) gained 3.4 percent while shares in Qualcomm (QCOM.O) were flat.

Shares of Micron Technology (MU.O) jumped nearly 10 percent after analysts at Nomura raised their target for the stock to $100 - $41 above current rates.

Ocular (OCLR.O) jumped 27 percent after laser and optical fiber specialist Lumen Holdings said it would buy the optical components producer for $1.7 billion. Lumentum’s shares rose 7.6 percent.

Wall Street had its worst two weeks in two years last month as fears of higher wages, inflation and interest rates triggered a selloff that dragged the main indexes into correction territory.

Traders of U.S. short-term interest-rate futures, however, have reeled bets back in on the Federal Reserve delivering any more than the earlier forecast three rate hikes this year.

The S&P 500 in response is just 3 percent below record highs hit on Jan. 26 while the Nasdaq .IXIC is back to

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