Updates with afternoon trading

By Noel Randewich and Shashwat Chauhan

Feb 10 (Reuters) - Wall Street's main indexes climbed on Monday, lifted by Nvidia and other tech-related stocks, while steelmakers surged after U.S. President Donald Trump said he would impose additional tariffs on steel and aluminum imports.

Trump's latest potential trade barrier escalation came on Sunday when he said he would introduce 25% tariffs on all imports of steel and aluminum into the United States, on top of existing duties on the metals.

U.S. metals producers that would benefit from steel and aluminum tariffs rallied. Nucor NUE.N, Steel Dynamics STLD.O and Cleveland-Cliffs CLF.N surged between 5% and 13%, while Century Aluminum CENX.O added 11% and Alcoa AA.N rose 3%. U.S. Steel X.N gained 4.7%.

AI chipmakers Nvidia NVDA.O and Broadcom AVGO.O rallied 3.6% and 4.5%, respectively, while Amazon AMZN.O added 1.5%.

"Investors are basically saying, 'Hey, let's go back into the areas that worked.' And one reason that investors are optimistic, in my opinion, is because of earnings," said Sam Stovall, chief investment strategist at CFRA Research.

With fourth-quarter reporting season over halfway through, S&P 500 companies are expected to have posted year-over-year earnings growth of 14.8%, up from expectations of less than 10% at the start of 2025, according to LSEG I/B/E/S.

Heavyweight technology stocks fell sharply on Friday after Trump announced reciprocal tariffs on all countries, matching the tariffs levied by them.

The S&P 500 was up 0.70% at 6,068.08 points.

The Nasdaq gained 1.12% to 19,742.49 points, while the Dow Jones Industrial Average was up 0.34% at 44,454.52 points.

Of the 11 S&P 500 sector indexes, nine rose, led by energy .SPNY, up 2%, followed by a 1.7% gain in information technology .SPLRCT.

U.S. Steel's shares also got a boost after Japan's chief cabinet secretary said Nippon Steel 5401.T was considering proposing a bold change in its plan to buy the company.

McDonald's MCD.N jumped nearly 5% after the hamburger chain posted a surprise rise in its global comparable sales in the fourth quarter.

Rockwell Automation ROK.N surged 14% after the automation products maker posted higher-than-expected profit for the fiscal first quarter.

Coca-Cola KO.N and DoorDash DASH.O are set to report their quarterly results on Tuesday, with CVS Health CVS.N and computer-networking equipment maker Cisco CSCO.O reporting on Wednesday.

Investors are also looking to Federal Reserve Chair Jerome Powell's biannual monetary policy report to the Senate Budget Committee on Tuesday and to the House of Representatives Financial Services Committee on Wednesday.

Expectations for the Fed's rate cuts to stay on hold in March solidified after Friday's mixed U.S. employment report.

Advancing issues outnumbered falling ones within the S&P 500 .AD.SPX by a 1.3-to-one ratio.

Across the U.S. stock market .AD.US, advancing stocks outnumbered falling ones by a 1.9-to-one ratio.

(Reporting by Shashwat Chauhan and Sukriti Gupta in Bengaluru and by Noel Randewich in Oakland, Calif.; Editing by Pooja Desai, Shinjini Ganguli and Rod Nickel)

((noel.randewich@tr.com;))