Why South Korea’s $200 Billion U.S. Investment Deal Was Still Uncertain

South Korea’s planned agreement with the United States was still uncertain on September 17, 2026, because the expected announcement had slipped before the two sides had publicly settled what Seoul would fund and on what terms. Cho Hyun described the delay as procedural; contemporaneous reporting pointed to disputes over nuclear projects, financing and investment risk. Those reported proposals were not final commitments.1828

A postponed briefing, not a completed agreement

The government postponed a September 17 briefing to a National Assembly committee and tentatively moved it to September 22. That cast doubt on a signing and announcement expected that week. The talks concerned $200 billion in strategic investments within a broader $350 billion U.S. investment pledge, of which $150 billion was earmarked for shipbuilding.12245

Before leaving for Washington, Cho said the delay was about making domestic procedures more certain rather than a disagreement between the governments. He was due to meet U.S. Secretary of State Marco Rubio during the visit, with economic and security matters on the agenda. The meeting offered a chance to discuss outstanding issues, but its scheduling did not mean the investment terms were settled.48

South Korea’s Industry Ministry had also cautioned that no first project was finalized and that an announcement required consultation with Washington and procedures under Korean law. Its position is important when reading reports about candidate projects: a proposal under discussion was not an approved investment.2128

Nuclear plans raised questions about technology and control

One reported proposal involved eight U.S. reactors—six using Westinghouse’s AP1000 design and two using Korea’s APR1400—with potential Korean investment of about $120 billion. That would consume most of the $200 billion strategic investment plan. Reporting connected nuclear-project disagreements to the delayed memorandum, but the reactor mix and spending remained negotiating proposals, not a finalized construction program.1928

A possible Korean stake in Westinghouse raised a separate question: would Seoul gain influence over a company central to the reactor plans, or hold a largely financial investment? Reports described negotiations over the buyer, stake size and transaction structure; one account said a stake below 10 percent could leave Korea without the board representation it sought. Another reported that the purchase might require financing outside the $200 billion fund.2532

Spent-fuel processing was another potential addition. A September 16 report described a U.S. proposal for Korean investment in pyroprocessing roughly 4,000 tons of spent nuclear fuel. Neither its investment amount nor its commercial return was established in that report, making it difficult to judge how it would fit within the $200 billion limit.4344

Funding and project returns remained open

Reports also described disagreement over the timing of Korean remittances, not just the total pledge. The government maintained that the strategic investment memorandum would be capped at $200 billion, with annual remittances no higher than $20 billion. Sending funds before project allocations and protections were settled would expose Seoul to obligations whose ultimate cost depended on the financing and loss-sharing terms. It would not, by itself, prove an equal drawdown of South Korea’s official foreign-exchange reserves.284446

In Texas, a proposed gas-fired power plant in Encinal illustrated the commercial stakes. Reports put its cost above $20 billion and described rising budget estimates, while negotiations continued over Korea’s investment, equity and profit share. A plant intended to serve data centers and other large customers would need credible buyers and revenue arrangements; arranging long-term power contracts would not be the same as guaranteeing their payments. Alaska LNG was also under consideration, adding questions about construction costs, returns and who would pay for overruns.202648

The decisive issue: who could recover losses?

Reporting identified a consequential accounting dispute. A portfolio-wide structure could use gains from successful projects to offset losses elsewhere before calculating overall recovery. Under project-by-project accounting, a profitable project could be settled separately even while Korea had unrecovered investments in other projects. That difference would affect how much risk Seoul could spread across the package and when any preferential U.S. share of profits would begin. Neither method would guarantee repayment if the projects collectively failed to earn enough.24

The postponement therefore had two readings that should not be collapsed into one: Cho’s public explanation was that domestic procedures needed clarification, while reports described substantial terms still in negotiation. As of September 17, the prudent conclusion was that the announcement was uncertain—and that neither the reported project list nor its proposed risk allocation should be treated as final.182128