(Updates prices to close)

By Sinéad Carew and Pranav Kashyap

April 7 (Reuters) -

The S&P 500 closed lower on Monday after a roller coaster

session, with investors worried about an economic slowdown and

rising inflation as U.S. President Donald Trump dug in his heels

on tariffs, warning he could further increase levies on China.

Wall Street equities have been hammered since Trump's

sweeping tariffs, announced late Wednesday, on all imports into

the U.S. and much higher levies on some major trading partners.

Early on Monday, all three major U.S. indexes touched their

lowest levels in more than a year, and the CBOE Volatility index

, Wall Street's fear gauge, breached 60 points, hitting

its highest level since August 2024.

"The underlying problem of the market is that the

administration's approach to trade imbalances is to try a cure

that's worse than the disease," said Rick Meckler, partner,

Cherry Lane Investments, a family investment office in New

Vernon, New Jersey.

"It's clear that investors favor either a pause or a

different look at how to do this. It's very telling that of the

many Trump supporters in the investment and business community,

it doesn't look like there's anybody stepping up and endorsing

the administration's approach to tariffs."

According to preliminary data, the S&P 500

lost 14.22 points, or 0.28%, to end at 5,059.86 points,

while the Nasdaq Composite gained 14.66 points, or

0.09%, to 15,602.44. The Dow Jones Industrial Average

fell 356.67 points, or 0.93%, to 37,958.19.

In the two days following Trump's tariff announcements

last week, the benchmark S&P 500 index dived 10.5% and lost

about $5 trillion in market value. It was the biggest two-day

loss since March 2020.

On Friday, the blue-chip Dow confirmed it was in a

correction, or more than 10% below its December record close

while the Nasdaq confirmed it was in a bear market.

In Monday morning trading, the S&P 500 had fallen 20%

below its record closing high. The index swung briefly into a

rally, after a news report said Trump was considering a 90-day

pause on tariffs. White House officials quickly denied the

report, sending the market back into the red.

Meckler said the market's wild swings on Monday left

investors "a little bit concerned that if facts start to change,

you could see a very rapid rise to this market."

"It's leading to this back-and-forth movement of rallies

that are effectively being sold and drops in the market where

people are covering shorts or trying to find a place to buy."

Several speeches by Federal Reserve officials and a

series of economic indicators, including consumer price data,

are expected this week, with markets keenly observing any

signals of recessionary fears.