Bank of Korea Warns Chip Exports Could Fall $100 Billion Short

South Korea's semiconductor exports could come in as much as $100 billion below forecast next year if U.S. big tech companies cut their artificial intelligence investment, the Bank of Korea has warned. The figure is the central bank's own scenario, not a baseline forecast. It is the starkest number yet attached to Korea's exposure to the AI spending cycle.

Chips now account for roughly half of all Korean exports, according to the central bank's assessment. That concentration is the problem. The Bank of Korea pointed out that the entire Korean economy could falter if a single external variable — American hyperscaler capex — turns down. One in two export dollars rides on it.

The warning is conditional. It assumes U.S. big tech slows AI investment next year. No company has confirmed such a cut. But the central bank judged the tail risk large enough to state publicly, and that judgment is itself the news.

What does the central bank actually propose?

The institution's prescription is preventive, not remedial. There are growing calls, it noted, to prepare for a semiconductor downcycle in advance by raising the competitiveness of industries outside chips. In plain terms: diversify before the cycle turns, not after.

What the central bank did not say matters as much. It offered no specific policy tools, no timeline, and no estimate of how much diversification would offset a $100 billion export shortfall. The warning is a stress test of Korea's economic structure, and the structure fails the test.

What else moved in Korea this week?

PHP zero-days and North Korean hackers. Hackers believed to be linked to North Korea are attacking global companies through a "third penetration path" in PHP, the program that supports 70% of the world's websites. The route bypasses the emergency patches issued for the ongoing security crisis. Major Korean companies completed the first patch over the weekend, but the new loopholes leave them exposed again. The attackers are exploiting gaps the patch does not cover.

Nearly 2 trillion won in stock swap bills. Large Korean companies have entrusted shares in listed affiliates to securities firms this year, raising close to 7 trillion won through price-return swaps (PRS), a report showed. The recent market plunge has pushed the underlying share prices below the contract reference levels. Settlement amounts owed to securities firms have now approached 2 trillion won. PRS let companies raise funds without raising their debt-to-equity ratios, which made the instrument popular during the market rally. When prices fell, the bills arrived anyway.

CPTPP membership pushed past the current presidency. President Lee Jae Myung said on the 26th that approval of Korea's accession to the Comprehensive and Progressive Trans-Pacific Partnership is unlikely within his term. "Even if we start right now, it should be considered that it is almost impossible within my term," he said. He acknowledged the political cost: "The most comfortable choice for politicians is not to do this. But for the whole country of Korea, we have to do it to move on to the next stage." Trade diversification, like industrial diversification, remains a project without a date.

Why the $100 billion number dominates

The four stories share one thread: Korea's economy is concentrated in channels it does not control. Chip exports depend on U.S. AI capex. Web infrastructure depends on PHP code paths. Corporate financing depends on stock prices. Trade access depends on CPTPP consensus among existing members. Each has a single point of failure.

The Bank of Korea's scenario gives the government a number to plan against. Whether Seoul acts on it before the cycle turns is the open question — and the central bank's own call for non-chip competitiveness suggests it doubts the answer.