On September 27, 2025, South Korea’s national security adviser, Wei Sanlo, said in a TV show that the tensions in the Korean-U.S. trade negotiations were completely torn apart: “We are unable to pay $350 billion in cash.”
This straightforward "stack" not only broke the previous vague cycle of investment issues between the two sides, but also put South Korea's economic realities on the table, but also made the game of trade interests between the United States and South Korea more and more clear.
Time back to the end of July, South Korea and the United States had high-profile announcement of the trade agreement framework. at the time, the South Korean government explicitly explained that $350 billion in US investment "mostly guaranteed and borrowed, cash only a very small part", this expression once made the outside world think that the two sides have reached a consensus on the core terms, the agreement is close to the eye.
However, with the deepening of negotiations, the situation suddenly changed-recently, it was revealed that the US suddenly changed its mouth and asked the ROK to "contribute almost all in cash". This change in key demands directly hit South Korea's economic weakness, and also brought the originally seemingly smooth agreement to a standstill instantly.
For South Korea, the cash investment of $350 billion is by no means a figure that can be borne by gritting your teeth. The data given by South Korea's Chosun Ilbo is extremely impactful: this amount has exceeded the total amount of global overseas direct investment (FDI) in South Korea in the past five years.
What's more serious is that, as South Korean President Lee Jae-myung warned in an interview on the eve of the UN General Assembly on September 22nd, South Korea "will face a financial crisis similar to that of 1997" if South Korea and the United States do not sign a currency swap agreement, if the full cash contribution is made as required by the United States.
The major damage to the South Korean economy from the 1997 Asian financial crisis is still a pain point in the national memory, and today this concern is the core reason why the South Korean government has rejected the U.S. demand – no country will bet on the stability of its own economy for a trade deal.
In the program, Wei Xiaobo specifically stressed that the South Korean position "is not a negotiating strategy, but objectively and genuinely beyond the level we can handle".
At present, South Korea's overseas investment mainly relies on independent decision-making and market-oriented financing of enterprises. If the government forces enterprises to invest in huge amounts of cash in the United States, it will not only seriously squeeze the enterprises' own R&D and production funds, but also cause liquidity tension in the domestic capital market, which will then be transmitted to people's livelihood and affect the overall economic operation.
More importantly, the “cash investment” demanded by the US is not accompanied by a reasonable income guarantee and risk hedge mechanism, and neither the South Korean government nor enterprises are willing to bear such “insurance, risk difficult to predict” huge expenses.
From the dimension of U.S.-Korean relations, this investment impasse is essentially a manifestation of the serious imbalance in the interests of both sides.The logic of the Trump administration is clear: through the trade agreement to attract more direct funds for the U.S. mainland, can promote local employment, but also to the economic data, fully in line with its "America priority" policy orientation.
But the U.S. has clearly ignored South Korea's economic capacity, putting its own claims above the actual situation of its partners, and this "unilateral pressure" negotiation method has turned the original equal trade consultation into a "inequal requirement" for South Korea.
However, South Korea has not completely closed the door to negotiations, but is striving to break up while upholding the bottom line. Wei Sanlo revealed that South Korea is already exploring alternatives and plans to continue consultations with the United States at the APEC summit in South Korea next month.
This arrangement not only leaves buffer time for both sides, but also reflects South Korea's balancing strategy-it does not want to completely intensify the contradiction with the United States due to investment issues. After all, the two countries are still deeply bound in the fields of security and diplomacy; Nor are they willing to sacrifice their own economic security for compromise and repeat the mistakes of the financial crisis.
The 350-billion-dollar investment dispute, in fact, is a deep test of the U.S.-Korean trade cooperation model.The core of the trade agreement should be "mutually beneficial and win-win", not the "requests" of one party to the other.
If the U.S. continues to adhere to unreasonable cash investment requirements, not only will it delay the agreement indefinitely, but it could also erode the basis of trust that the two countries have accumulated in long-term cooperation – in the context of economic globalization, no country is willing to long-term bear the cost of “inequal cooperation”, South Korea’t.
For South Korea, the upcoming APEC summit negotiations are a key battlefield. How, while clearly rejecting full cash investments, proposing alternatives that would allow the US to accept (such as expanding technological cooperation, opening specific markets, etc.) tested the wisdom of the South Korean negotiating team.
For the U.S. side, whether it is willing to face South Korea's economic difficulties, let go of the "unilateral pressure" gesture, adjust unreasonable demands, will directly determine the final course of this trade game.
In the final analysis, the 350 billion investment dispute has never been just a matter of funds, but also the touchstone of "equality and respect" in US-ROK relations. Only by returning to the essence of "equal consultation, mutual benefit and win-win" can this deadlocked negotiation find a way to break the situation and avoid the irreparable rift in the relationship between the two countries due to an "unaffordable investment".