Indications that levies lined up for the president's "Liberation Day" on April 2 would be less severe than feared had given investors a little hope, and helped markets chalk up much-needed gains.

However, the White House's habit of alternating between tough talk and leniency has fanned uncertainty, and the latest announcement did little to soothe nerves.

"What we're going to be doing is a 25 percent tariff on all cars that are not made in the United States," he said as he signed an order in the Oval Office.

The move takes effect at 12:01 am eastern time (0400 GMT) on April 3 and impacts foreign-made cars and light trucks. Key automobile parts will also be hit within the month.

About half of the cars sold in the United States are made within the country. Of the imported motors, about half come from Mexico and Canada, with Japan, South Korea and Germany also major suppliers.

Japan's government called the tariffs "extremely regrettable" while Canadian Prime Minister Mark Carney called it a "direct attack" on his country's workers.

There was little comfort in Trump's comments that reciprocal measures lined up for next week could be "very lenient".

The auto news hammered carmakers in Asia.

In Tokyo, Toyota and Honda shed more than three percent while Nissan was off 2.5 percent. Seoul-listed Hyundai gave up more than four percent.

US-listed car giants also tumbled with General Motors, Ford and Stellantis all deep in the red in after-hours trade.

"It's a stark reminder: Trump's not bluffing -- or at least he's doing a damn good job pretending he's not," said SPI Asset Management's Stephen Innes.

"And if he goes full throttle with this round of tariffs -- especially the reciprocal measures slated for April 2 -- markets are staring down the barrel of the worst-case macro cocktail: faster inflation, slower growth and a fresh wave of volatility.

The retreat in the auto sector hit broader markets, which were already shaky owing to worries over Trump's trade agenda.

Tokyo and Seoul almost one percent, with Sydney, Wellington, Taipei and Manila also down.

However, Hong Kong and Shanghai eked out gains with Singapore

There was a little cheer after Trump told reporters at the White House that he might offer to reduce tariffs on China to get Beijing's approval for the sale of popular social media platform TikTok.

Earlier this month, Trump said Washington was in talks with four groups interested in buying TikTok, which has been in limbo after a US law ordered it to divest from its Chinese owner ByteDance or be banned in the country owing to national security concerns.

The broadly negative day followed losses on all three of Wall Street's main indexes ahead of the president's announcement, with the CBOE Volatility Index -- or "fear gauge" -- jumping almost seven percent.

Market jitters were compounded by data Tuesday showing consumer sentiment had fallen to its lowest level since 2021 as concerns about higher prices increase.

- Key figures around 0230 GMT -

Tokyo - Nikkei 225: UP 0.9 percent at 37,674.03 (break)

Hong Kong - Hang Seng Index: UP 0.6 percent at 23,624.74

Shanghai - Composite: UP 0.2 percent at 3,374.63

Euro/dollar: UP at $1.0766 from $1.0757 on Wednesday

Pound/dollar: UP at $1.2900 from $1.2891

Dollar/yen: DOWN at 150.11 yen from 150.54 yen

Euro/pound: UP at 83.46 pence from 83.41 pence

West Texas Intermediate: UP 0.1 percent at $69.72 per barrel

Brent North Sea Crude: UP 0.1 percent at $73.85 per barrel

New York - Dow: DOWN 0.3 percent at 42,454.79 (close)

London - FTSE 100: UP 0.3 percent at 8,689.59 (close)

dan/lb

TOYOTA MOTOR

HONDA MOTOR

NISSAN MOTOR

Hyundai Motor Company

General Motors

FORD MOTOR

Stellantis

INDEX CORP.

Dow