On stock markets, a rally across Asia following gains by US tech heavyweights failed to bolster indices in Europe and the United States, where traders focussed on a string of corporate results.

The gains for oil extended a surge seen Wednesday, after the White House warned that Iran would be "wise" to do a deal with the United States.

US President Donald Trump once again hinted at a strike on Tehran on his Truth Social site, with a US military buildup underway in the Middle East.

"Oil is extending its gains, with Brent crude back above $70 a barrel... as fears of a military confrontation between the US and Iran rattled energy markets," said Matt Britzman, senior equity analyst at Hargreaves Lansdown.

"Nuclear talks between the two sides appear to be going nowhere fast, and the geopolitical premium is clearly back in play," he added.

The US benchmark oil contract WTI rose to a six-month high.

"The US has moved a stack of military assets into the region, and this is unnerving investors," said Trade Nation analyst David Morrison.

Wall Street's main indices moved lower at the start of trading in New York.

Morrison said the minutes of its last meeting of the Federal Reserve's monetary policy committee released late Wednesday were also affecting sentiment.

"These were viewed as more hawkish than expected, and this added some downward pressure on equities," he said.

He noted that some members indicated they want to wait to see inflation fall further before cutting rates again, while others indicated the next move could be a hike in rates.

Recent strong data on the US economy has suggested that the Fed might not need to cut rates any time soon.

Shares in Walmart rose 2.3 percent as traders focussed on solid fourth-quarter results and not its forecasts for slower growth.

Major European indices were in the red, with shares in plane maker Airbus down six percent in Paris and Frankfurt after its annual results fell short of analysts' expectations.

Shares in French carmaker Renault fell 3.6 percent in Paris after it posted higher 2025 sales but warned of slipping profit margins from increased sales of electric and hybrid vehicles.

In London, disappointing earnings from mining giant Rio Tinto and energy group Centrica weighed on the blue-chip FTSE 100 index.

In Asia, Seoul's Kospi led gains, jumping more than three percent to a record high as it reopened after the Lunar New Year break, with chip giants Samsung and SK hynix once again the standout performers.

Tokyo also advanced while Hong Kong, Shanghai and Taipei remained closed for the Lunar New Year holiday.

Asian stocks are enjoying a strong start to the year as investors turn to the region's relatively cheaper tech plays after Wall Street's AI-fuelled surge over the past two years.

- Key figures at around 1430 GMT -

Brent North Sea Crude: UP 1.6 percent at $71.48 per barrel

West Texas Intermediate: UP 1.8 percent at $66.21 per barrel

New York - Dow: DOWN 0.3 percent at 49,495.08 points

New York - S&P 500: DOWN 0.4 percent at 6,857.10

New York - Nasdaq: DOWN 0.5 percent at 22,651.17

London - FTSE 100: DOWN 0.6 percent at 10,622.06

Paris - CAC 40: DOWN 0.7 percent at 8,371.26

Frankfurt - DAX: DOWN 1.0 percent at 25,020.31

Tokyo - Nikkei 225: UP 0.6 percent at 57,598.83 (close)

Hong Kong - Hang Seng Index: Closed for holiday

Shanghai - Composite: Closed for holiday

Euro/dollar: DOWN at $1.1749 from $1.1784 on Wednesday

Pound/dollar: DOWN at $1.3441 from $1.3500

Euro/pound: UP at 87.41 pence from 87.29 pence

Dollar/yen: UP at 155.26 yen from 154.80 yen

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Hargreaves Lansdown

Walmart

Airbus Group

Renault

CENTRICA

Samsung Electronics

SK Hynix

Dow

S&P Global Ratings