Trump's saying the trade war may last another year came a day after his administration announced new tariffs on steel from Brazil and Argentina and threatened duties of up to 100% on French goods because of a digital services tax that Washington says harms U.S. tech companies.

All that appeared to dash hopes that an agreement with China could be reached before another round of U.S. tariff hikes kicks in on Dec. 15 and "triggered a lot of high-frequency traders to sell stocks," said Bucky Hellwig, senior vice president at BB&T Wealth Management in Birmingham, Alabama.

"But later on in the day, we saw buying come in," he said, since "the underlying fundamentals are still favorable." They include a potential re-acceleration in earnings growth, stable economic growth and low interest rates.

MSCI's gauge of stocks across the globe shed 0.6%.

On Wall Street, the Dow Jones Industrial Average fell 280.23 points, or 1.01%, to 27,502.81, the S&P 500 lost 20.67 points, or 0.66%, to 3,093.2 and the Nasdaq Composite dropped 47.34 points, or 0.55%, to 8,520.64.

The S&P 500's session low was 3,070.33.

Europe appeared to be the next theater of the global trade war.

France said on Tuesday it was prepared to push the European Union to respond in kind if the United States followed through on its threats to raise tariffs.

Investors sought out bonds as a safe haven. The benchmark 10-year U.S. Treasury note's yield was 12.7 basis points lower at 1.709% in afternoon trade. Around noon, it had fallen as low as 1.693%, 14.3 basis points off the close on Dec. 2 and the biggest daily fall since May 2018.

German bond yields slipped from three-week highs, but bond prices are likely to stay under pressure amid renewed risks of early elections or a minority government in the biggest euro zone economy.

The safe-haven bid was in evidence on currency markets too, with the yen and Swiss franc rallying against the dollar.

In afternoon trading, the dollar fell 0.3% against the yen to 108.60 yen, after hitting a two-week low of 108.49. The dollar also slid against the Swiss franc, down 0.4% at 0.9870 franc. Earlier, the greenback hit a four-week trough of 0.9858 franc.

In the energy market, Brent crude futures fell 10 cents to settle at $60.82 a barrel. U.S. West Texas Intermediate (WTI) crude futures rose 14 cents to settle at $56.10 a barrel.

Graphic: Global assets in 2019 - http://fingfx.thomsonreuters.com/gfx/rngs/COMMODITIES-ASSETS/010031B62XZ/index.html

Graphic: Global currencies versus dollar - http://fingfx.thomsonreuters.com/gfx/rngs/GLOBAL-CURRENCIES-PERFORMANCE/0100301V041/index.html

Graphic: Emerging markets in 2019 - http://fingfx.thomsonreuters.com/gfx/rngs/WORLD-ECONOMY/0100315T2M2/index.html

Graphic: MSCI All Country Wolrd Index Market Cap - http://fingfx.thomsonreuters.com/gfx/rngs/GLOBAL-MARKETS/010060TL1KC/index.html

(Reporting by David Randall and Caroline Valetkevitch; additional reporting by Gertrude Chavez-Dreyfuss and Ross Kerber; editing by Jonathan Oatis, Tom Brown and Dan Grebler)

By David Randall and Caroline Valetkevitch