Trump announces 25% tariffs on Japan and South Korea

The imposition of the 25% levy on U.S. importers of all goods from key allies Japan and South Korea rattled Wall Street, with the S&P 500 Index .SPX knocked back sharply, though markets in Asia were taking the latest news in stride.

The 14 countries sent letters so far, which included smaller U.S. exporters like Serbia, Thailand and Tunisia, hinted at opportunities for additional negotiations while at the same time warning that any reprisal steps would be met with a like-for-like response.

"If for any reason you decide to raise your Tariffs, then, whatever the number you choose to raise them by, will be added onto the 25% that we charge," Trump said in letters, released on his Truth Social platform, to Japan and South Korea.

The higher tariffs take effect August 1, and notably will not combine with previously announced sector tariffs such as those on automobiles and steel and aluminum.

That means, for instance, that Japanese vehicle tariffs will remain at 25%, rather than the existing 25% auto sector tariff climbing to 50% with the new reciprocal rate as has occurred with some of Trump's tariffs.

The clock has been ticking for countries to conclude deals with the U.S. after Trump unleashed a global trade war in April that has roiled financial markets and sent policymakers scrambling to protect their economies.

Trading partners got another reprieve as Trump signed an executive order on Monday extending the Wednesday deadline for negotiations to August 1.

Asked if the deadline was firm, Trump said: "I would say firm, but not 100% firm. If they call up and they say we'd like to do something a different way, we're going to be open to that."

Trump has kept much of the world guessing on the outcome of months of talks with countries hoping to avoid the hefty tariff hikes he has threatened.

The rate for South Korea is the same as Trump initially announced, while the rate for Japan is 1 point higher than the one announced on April 2. A week later, he capped all of the so-called reciprocal tariffs at 10% until Wednesday. Only two agreements have so far been reached, with Britain and Vietnam, while Washington and Beijing in June agreed on a framework covering tariff rates.