Donald Trump warned countries that do business with Iran would not be able to trade with the United States

Hong Kong (AFP) - A rally in Asian markets stuttered on Wednesday, with early gains pared as the US-China trade row erodes investor confidence.

Wall Street had provided another strong lead with the Nasdaq approaching a record high, while energy firms in Asia pressed on with their rally following more gains in oil prices.

But after two days of gains across the region, Asia could not maintain its morning momentum and key markets were mixed in the afternoon, despite forecast-beating Chinese trade figures.

Tokyo ended 0.1 percent lower, Shanghai shed 1.3 percent and Singapore was down 0.8 percent, while Wellington was also off.

Hong Kong ended up 0.4 percent, Sydney closed up 0.2 percent and Seoul put on 0.1 percent, with Taipei, Manila and Jakarta also higher.

After months of tensions, traders remain on edge for any new developments in the trade saga involving the world’s top two economies.

On Tuesday the US said Donald Trump’s 25 percent tariffs on a further $16 billion of Chinese goods would kick in on August 23. That is on top of the measures imposed on $34 billion of imports last month.

The move had been widely expected. But with China putting retaliatory measures in place, it reinforced fears the two sides are heading for an all-out trade war that could hammer the global economy.

The White House has also lined up another $200 billion in Chinese imports to target in future.

Kerry Craig, global markets strategist at JPMorgan Asset Management in Melbourne, said the trade row was the biggest risk to the global economy, adding: “We don’t expect it to fade any time soon and we do think it’s a big worry about the sentiment it creates in the markets.”

- ‘Herd behaviour’ -

Still, China released figures showing its trade surplus with the US dipped only slightly in July. Globally its exports rose a better-than-forecast 12.2 percent and imports surged 27.3 percent, also beating expectations.

The yuan got some support after a Bloomberg News report said the Chinese central bank had emphasised the need for currency stability to the country’s lenders as it looks to halt a slide in recent months.

It said officials called on them to prevent “herd behaviour” and momentum-chasing moves in the forex markets, fearing a run on the yuan similar to 2015-16. This hammered the unit and sent global markets into a tailspin.

The report comes after Friday’s move by the People’s Bank of China to make it harder to bet against the currency.

“This move is consistent with what the PBoC did earlier – it can be considered as preemptive efforts made to slow the yuan’s depreciation, prevent one-sided bets on weakness and avoid a sense of panic,” Eddie Cheung, Asia foreign-exchange strategist at Standard Chartered in Hong Kong, told Bloomberg.

Energy firms remain popular as oil prices rise on worries about the trade row and a drop in Saudi Arabian output.

Both main contracts were flat in Asia after clocking up big gains on Tuesday.

Prices also got support after the US reimposed a first round of sanctions on Tehran after leaving the nuclear deal, with an embargo on the country’s crude exports in November.

Trump warned other countries against doing business with Iran in the face of the sanctions, saying they would be barred from trading with the United States.

“The entreaty of the Americans that anyone who will do business with them (Iran) won’t be able to do business in the US is something to watch,” said Greg McKenna, chief markets strategist at AxiTrader.

In early European trade London dipped 0.1 percent, while Frankfurt and Paris each fell 0.2 percent.

- Key figures at 0810 GMT -

Tokyo - Nikkei 225: DOWN 0.1 percent at 22,644.31 (close)

Hong Kong - Hang Seng: UP 0.4 percent at 28,359.14 (close)

Shanghai - Composite: DOWN 1.3 percent at 2,744.07 (close)

London - FTSE 100: DOWN 0.1 percent at 7,709.22

Euro/dollar: UP at $1.1614 from $1.1597 at 2130 GMT

Pound/dollar: DOWN at $1.2934 from $1.2938

Dollar/yen: DOWN at 111.12 yen from 111.37 yen

Oil - West Texas Intermediate: DOWN one cent at $69.16 per barrel

Oil - Brent Crude: UP two cents at $74.67 per barrel

New York - Dow Jones: UP 0.5 percent at 25,628.91 (close)