US, South Korea unveil details on shipbuilding investment and subs in trade deal

The joint announcement followed a meeting in October between South Korean President Lee Jae Myung and U.S. President Donald Trump, where they agreed to a deal that would cut American import duties on South Korea's products to 15% from 25%.

"Finally, the South Korea-U.S. trade, commerce, and security negotiations, which were among the biggest variables affecting our economy and security, are ... concluded," Lee said on Friday.

"Good competition requires excellent partners, and I believe President Trump's rational decision played a significant role in achieving meaningful agreement."

South Korea's Industry Minister Kim Jung-kwan and U.S. Commerce Secretary Howard Lutnick signed a memorandum of understanding on Friday, a 27-point non-binding document on strategic investments.

It lays out a schedule for implementation of projects that will be selected by the U.S. president after consultations with South Korea, and Seoul is required to transfer funds within 45 days of the decisions.

The announcement of the trade deal caps more than three months of wrangling over Trump's tariffs that have targeted trading partners around the world. South Korea was particularly alarmed by the prospect of crushing duties on key exports like semiconductors and autos.

Lee, who took office five months ago with a mandate to steer the country away from the shock of a failed martial law imposition by his predecessor, had sought to score an early diplomatic win by turning an economic threat into an opportunity to boost the country's trade and security status.

Under the agreement, Lee said South Korea will form a new partnership with the U.S. on shipbuilding, AI, and the nuclear industry, helping its ally "rebuild crucial industries just as the U.S. helped South Korea in the past."

A fact sheet released by the White House said the U.S. gave approval for South Korea to build nuclear-powered submarines and will work closely with Seoul to find "avenues to source fuel."

Washington also accepted South Korea's request that $200 billion in cash investments would come in installments no larger than $20 billion a year in an effort to keep the won stable.

The fact sheet said the countries agreed South Korea's investments should not "give rise to market instability."

If signs of instability appeared, South Korea could seek an "adjustment in the amount and timing of the funding, and the United States will, in good faith, give due consideration to such request," it said.

The U.S. will cut tariffs on South Korean products including autos to 15% from 25%. Semiconductors will be subject to tariff terms no less favourable than those for Taiwan, a presidential adviser said.

The agreement with Washington showed Lee made inroads on major security and energy initiatives by paving the way to build nuclear-powered submarines and expanding its nuclear energy capabilities.

Lee's national security adviser said the countries had discussed the issue of nuclear-powered submarines on the "premise" that the vessels would be built in South Korea.

Trump previously said the submarines would be built in a Korean-owned shipyard in Philadelphia.

Under the deal, the U.S. pledged to cooperate on finding a way for South Korea to enrich uranium and reprocess spent nuclear fuel.

Analysts said it was too early to say whether South Korea got a better deal than Europe and Japan. Kim Dong-yup, a former Navy officer now at Kyungnam University, said the agreement on nuclear energy and security meant Seoul had to pay much more for defence, but Lee was faced "with an inevitable choice."