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US job openings rise to 7.74 million in January

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Delta Air Lines ( DAL ) lowers first-quarter forecast, shares fall

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Kohl's slides on bleak annual sales forecast

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Indexes off: Dow 1.02%, S&P 500 0.62%, Nasdaq 0.19%

(Updates with morning prices)

By Johann M Cherian and Pranav Kashyap

March 11 (Reuters) - Wall Street's main indexes fell in

choppy trading on Tuesday after U.S. President Donald Trump

announced fresh tariffs on Canada, adding to investor unease

that his trade policies could trigger an economic slowdown.

Trump doubled his planned tariff on all steel and aluminum

products coming into the U.S. from Canada, bringing the total to

50%, in response to the province of Ontario placing a 25% tariff

on electricity coming into the United States.

Global markets have been roiled ever since Trump sparked

back-and-forth tariff moves against major trading partners such

as Canada, Mexico and China. Analysts warn this escalating trade

tension could fan inflationary pressures and potentially stall

economic growth.

On Monday, the S&P 500 recorded its most significant one-day

drop since December 18, wiping out a staggering $4 trillion from

its recent peak. Meanwhile, the tech-heavy Nasdaq confirmed a

10% correction late last week.

"Every time we feel like we're getting a little bit of a

lift, we get a Trump update on more tariffs ... it's getting

ugly and it's going to hurt," said Dennis Dick, a trader at

Triple D Trading.

"International investors looking at all the political

uncertainty in the North American markets are saying let's

invest elsewhere."

At 10:23 a.m. ET the Dow Jones Industrial Average

fell 427.33 points, or 1.02%, to 41,484.38, the S&P 500

lost 34.54 points, or 0.62%, to 5,580.02, and the Nasdaq

Composite lost 33.70 points, or 0.19%, to 17,434.62.

All 11 S&P 500 subsectors fell, with cyclical stocks such as

industrials and financials down about 1%.

Reflecting slowing consumer demand, Kohl's forecast

a bigger-than-expected drop in annual comparable sales, sending

the retailer's shares down 19.9%.

Dick's Sporting Goods declined 4.3% after the

retailer forecast downbeat annual results.

Delta Air Lines ( DAL ) slid 6.2% after the carrier slashed

its first-quarter profit estimates by half as CEO Ed Bastian

blamed heightened U.S. economic uncertainty.

American Airlines ( AAL ) dropped 3.8% after the carrier

forecast a bigger-than-expected first-quarter loss.

Meanwhile, a U.S. Labor Department report showed job

openings increased in January. A closely watched inflation

report is expected later in the week.

Interest rate futures point to the U.S. Federal Reserve

leaving borrowing costs unchanged at its meeting next week, but

they also have penciled in that the central bank could lower

borrowing costs by at least 75 basis points by December on

expectations of slowing growth.

Trump will meet the chief executives of America's biggest

companies later in the day.

Megacaps were mixed, with Nvidia ( NVDA ) down 1%, while

Apple ( AAPL ) lost 2.2%. Tesla added nearly 1% after

the stock fell 15.4% in the previous session.

Oracle dropped 6.5% after the cloud company missed

quarterly revenue estimates.

Citi became the latest brokerage to revise its stance on

U.S. stocks, downgrading its recommendation to "neutral".

Despite the volatility, stock market valuations remain

substantially higher than historical averages, according to LSEG

Datastream.

Declining issues outnumbered advancers for a 1.36-to-1 ratio

on the NYSE and a 1.31-to-1 ratio on the Nasdaq.

The S&P 500 posted four new 52-week highs and 10 new lows,

while the Nasdaq Composite recorded 11 new highs and 174 new

lows.