(Adds U.S. market open, byline, dateline; previous LONDON)
* U.S. likely to announce tariffs on $200 bln in Chinese goods
* Wall St dragged by Apple, Amazon, fears of fresh tariffs
* Dollar broadly weaker as trade concerns weigh
* Oil trades mixed on supply, demand concerns
By Herbert Lash
NEW YORK, Sept 17 (Reuters) - A gauge of global equity markets eased and the dollar slipped on Monday as investors took a dim view of an expected new round of tariffs from Washington on Chinese goods, which would escalate a simmering U.S.-Sino dispute over trade.
U.S. President Donald Trump was expected to announce new tariffs on $200 billion in Chinese goods as early as Monday, and China has said it would retaliate.
A weaker dollar lifted gold prices and the price of most industrial metals slipped as the tit-for-tat dispute has fueled concerns that demand for metals will weaken.
Apple and Amazon.com bore the brunt of investor worries about the tariffs, which were on a list unveiled in July that included $200 billion worth of internet technology products, other electronics, printed circuit boards and consumer goods.
"Investors are slowly starting to realize that these new tariffs could be extremely disruptive to the supply chain," said Art Hogan, chief market strategist at B. Riley FBR in New York.
The trade tiff has yet to be felt in U.S. markets as the tariffs, which now are set at 3.8 percent, may rise to just 10 percent, which most companies can handle in a growing economy, said Brian Nick, chief investment strategist at Nuveen.
MSCI's gauge of stocks across the globe shed 0.23 percent while the pan-European FTSEurofirst 300 index of leading regional shares rose 0.05 percent.
On Wall Street, the Dow Jones Industrial Average fell 8.84 points, or 0.03 percent, to 26,145.83. The S&P 500 lost 8.27 points, or 0.28 percent, to 2,896.71 and the Nasdaq Composite dropped 72.22 points, or 0.9 percent, to 7,937.82.
The dollar's weakening is a good sign for global markets, especially in emerging markets where the strong dollar has been a cause for concern, Nick said.
The greenback has benefited from safe-haven flows as the U.S.-Chinese trade conflict worsened.
The dollar index fell 0.4 percent and the euro rose 0.48 percent to $1.1684. The Japanese yen strengthened 0.05 percent versus the greenback at 112.02 per dollar.
U.S. Treasury yields rose across the board on growing expectations the Federal Reserve would raise interest rates in September and December, and perhaps at least twice more in 2019.
Yields on the 10-year U.S. Treasury note touched 3.022 percent, the highest level since late May. U.S. 30-year yields also hit a four-month peak of 3.159 percent, while 2-year yields soared to 2.799 percent, the strongest level in 10 years.
The benchmark U.S. 10-year note last rose 1/32 in price to yield 2.9922 percent.
Yields on 10-year German bunds rose to 0.472 percent, but pared losses to trade at 0.458 percent.
Oil prices were little changed as traders weighed potential supply cuts from U.S. sanctions on Iran against deepening trade tensions between the United States and China that could dent global crude demand.
Brent crude futures rose 11 cents to $78.20 a barrel by 11:12 a.m. EDT (1512 GMT), while U.S. West Texas Intermediate (WTI) crude futures fell 3 cents to $68.96 a barrel.
Additional reporting by Helen Reid in LONDON, Divya Chowdhury in MUMBAI and Wayne Cole in SYDNEY Reporting by Tommy Reggiori Wilkes Editing by Gareth Jones and Nick Zieminski