Lee and Trump Hail Progress on $350 Billion US Investment Package at UN Meeting

What happened

South Korean President Lee Jae Myung and U.S. President Donald Trump met for 30 minutes on Wednesday, Sept. 23, 2026, on the sidelines of the UN General Assembly in New York, and both sides welcomed what Seoul's presidential office described as significant progress on strategic investment projects, according to coverage by The Epoch Times.

The meeting advances implementation of the 2025 U.S.–South Korea trade agreement, under which South Korea agreed to invest $350 billion in the United States in exchange for a reduced 15% U.S. tariff on South Korean goods, including automobiles. The package breaks down into $200 billion in strategic investments spanning energy, semiconductors, pharmaceuticals, critical minerals, artificial intelligence and quantum computing, plus $150 billion earmarked for shipbuilding cooperation.

National Security Adviser Wi Sung-lac said the discussions covered a Texas gas-fired power project identified as a potential first investment under the agreement, possible nuclear energy investments, and the Alaska LNG project. South Korea's Ministry of Trade, Industry, and Resources had briefed lawmakers on implementation plans a day earlier, on Sept. 22, 2026.

Cooperation areas agreed beyond trade include nuclear submarine fuel, enrichment and reprocessing, shipbuilding, and the transfer of wartime operational control. On the shipbuilding front, the two sides advanced warship construction cooperation, including U.S. military vessel construction at Hanwha's Philly Shipyard in Philadelphia, as reported by Marine Insight.

On North Korea, Trump reaffirmed his willingness to engage in dialogue. Lee wrote on X: "As peacemaker and pacemaker, [South Korea] and the United States will communicate even more closely to reopen the stalled channels of dialogue and help establish sustainable peace on the Korean Peninsula."

At the Republic of Korea Investment Summit 2026 in New York, Lee said Samsung Electronics, SK Hynix, Hyundai Motor and Samsung Biologics are making large investments in Texas, Indiana, Georgia and Maryland respectively. He said South Korea would double its memory production capacity within five years and move toward a 24-hour foreign exchange market.

Separately, U.S. Secretary of State Marco Rubio met the South Korean and Japanese foreign ministers on Sept. 21, 2026. A State Department joint statement reaffirmed U.S. defense commitments to Japan and South Korea "backed by U.S. military capabilities, including its nuclear deterrent," and commitment to North Korea's denuclearization.

Trump said he looked forward to continuing conversations with Lee at the G20 summit in Miami later this year, and the two leaders discussed playing golf together.

Why it matters

For markets, the significance sits in three places: the deployment mechanics of the $350 billion, the tariff relief it secures, and the capacity commitments that feed into global semiconductor and shipbuilding supply.

On deployment, the package represents one of the largest single-country investment commitments ever directed into U.S. strategic sectors, and the meeting moved it from framework to execution. The identification of a Texas gas-fired power project as a potential first investment gives markets a concrete starting point for the capital schedule, and the Ministry of Trade, Industry, and Resources briefing to lawmakers on Sept. 22 signals that implementation planning has reached the legislative communication stage in Seoul. The sector split matters for asset allocators: $200 billion is pointed at energy, semiconductors, pharmaceuticals, critical minerals, AI and quantum computing, while $150 billion is dedicated to shipbuilding, where the two governments have already tied the money to a named asset, U.S. military vessel construction at Hanwha's Philly Shipyard. A commitment of that size flowing into U.S. dollar-denominated projects also raises the currency question, and Lee's announcement of a move toward a 24-hour foreign exchange market reads as the plumbing response: extending won trading hours to match investment activity that no longer respects the Seoul session, a structural change for won liquidity and for desks trading KRW outside Asian hours.

On tariffs, the reduced 15% rate on South Korean goods, including automobiles, is the consideration South Korea receives for the $350 billion, and continued progress on the investment schedule is what keeps that treatment in place. For Hyundai Motor, whose U.S. footprint Lee placed in Georgia, tariff certainty is the difference between pricing U.S.-bound production on a fixed duty schedule and carrying policy risk on every shipment. The same logic applies across the Korean export complex, where autos are the largest tariff-sensitive category under the deal.

On capacity, Lee's statement that South Korea would double its memory production capacity within five years is the number with the widest read-across, given that Samsung Electronics and SK Hynix together anchor global memory supply. New capacity in Texas and Indiana, as outlined at the investment summit, ties Korean balance sheets to U.S.-located fabrication, with implications for global memory pricing dynamics as that capacity comes online. The energy leg, spanning the Texas gas-fired power project, possible nuclear investments and Alaska LNG, links the package to U.S. power buildout at a time when data center and semiconductor demand are straining grids.

The security dimension runs alongside the economic one. The Rubio trilateral statement of Sept. 21 reaffirmed the U.S. nuclear deterrent commitment to both allies, and the cooperation list now includes nuclear submarine fuel, enrichment and reprocessing, and transfer of wartime operational control, items at the sensitive end of the alliance agenda. Trump's reaffirmed willingness to talk with North Korea, paired with Lee's public message about reopening stalled dialogue channels, frames the economic package within a broader diplomatic push. Coverage of the meeting was broad but uneven: Ground News tracked 45 sources, rated 8% left, 63% right and 29% centre, a distribution flagged as a left-side blindspot.

What to watch

Watch for formal confirmation of the Texas gas-fired power project as the first investment under the agreement, and for further detail from the Ministry of Trade, Industry, and Resources following its Sept. 22 briefing to lawmakers. The pace of shipbuilding implementation, including U.S. military vessel work at Hanwha's Philly Shipyard, is a second marker. A third is the G20 summit in Miami later this year, where Trump said he looked forward to continuing conversations with Lee. Progress on nuclear energy investments and the Alaska LNG project, both raised in the 30-minute meeting, and any movement on the 24-hour foreign exchange market plan round out the calendar of follow-through items.

By the numbers

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