*

CarMax ( KMX ) falls as Q4 profit misses estimates

*

March CPI at 2.4% YoY vs 2.6% estimate

*

Indexes down: Dow 2.86%, S&P 500 3.66%, Nasdaq 4.40%

(Updates to afternoon)

By Stephen Culp

NEW YORK, April 10 (Reuters) - Wall Street stocks

tumbled on Thursday on mounting worries over the economic impact

of U.S. President Donald Trump's multi-front tariff war.

All three major U.S. stock indexes fell sharply, forfeiting

much of the previous session's gains as growing concerns over

the escalating Washington-Beijing trade face-off dampened

optimism over upbeat economic data and U.S.-Europe trade

negotiations.

After Trump announced a 90-day tariff reprieve on Wednesday,

the S&P 500 surged 9.5%, the largest one-day percentage jump

since October 2008. The tech-heavy Nasdaq soared 12.2%, notching

its second-biggest daily gain on record.

Despite Wednesday's bounce, the S&P 500 remained more than

6% below levels before the reciprocal tariffs were announced

last week.

"Investors are still uncomfortable with it, because they

don't know what the end game is," said Paul Nolte, senior wealth

advisor at Murphy & Sylvest in Elmhurst, Illinois. "I think what

we're seeing, still, is investor concern about tariffs and that

is pretty much front and center for everything."

The Labor Department's Consumer Price Index report showed

the prices consumers pay for a basket of goods unexpectedly

edged lower in March, with core price growth cooling down 2.8%

year-on-year, coming within one percentage point of the Federal

Reserve's 2% inflation target.

But the Fed's path forward, in light of ongoing trade

negotiations, is less clear.

Fed Governor Michelle Bowman said on Thursday that while the

U.S. economy remains strong, the effects of Trump's trade

policies are unclear, while Chicago Fed President Austan

Goolsbee said rate cuts could resume once the uncertainties

surrounding trade policy is resolved.

In response to Trump's 90-day tariff pause, the European

Union will delay retaliatory levies on American goods as

countries within the bloc scramble to reach trade deals with

Washington, said European Commission chief Ursula von der Leyen.

But the trade war with Beijing persists, with China vowing

to "follow through to the end" if the U.S. does not let up.

The CBOE Market Volatility Index, often called the

"fear index," remained elevated, and was last at 44.80.

"It's hard for investors to feel comfortable about buying

stocks with volatility so high," Nolte added.

The Dow Jones Industrial Average fell 1,162.76

points, or 2.86%, to 39,445.69. The S&P 500 lost 199.51

points, or 3.66%, at 5,257.39 and the Nasdaq Composite

dropped 753.78 points, or 4.40%, to 16,371.19.

All 11 major sectors in the S&P 500 were lower, with energy

and tech suffering the steepest declines.

Big Tech came under pressure once again, with each of the

so-called Magnificent Seven group of artificial

intelligence-related momentum stocks down between 3.6% and

8.5%.

CarMax ( KMX ) slid 17.0% after the used-car retailer missed

fourth-quarter profit expectations.

First-quarter earnings season kicks off on Friday with big

banks, including JPMorgan Chase ( JPM ), Morgan Stanley ( MS )

and Wells Fargo ( WFC ) due to report.

Declining issues outnumbered advancers by a 5.21-to-1 ratio

on the NYSE. There were 30 new highs and 169 new lows on the

NYSE.

On the Nasdaq, 886 stocks rose and 3,499 fell as declining

issues outnumbered advancers by a 3.95-to-1 ratio.

The S&P 500 posted no new 52-week highs and six new lows

while the Nasdaq Composite recorded 11 new highs and 128 new

lows.