If the September 24 Trump-Xi summit fails to reach a tariff agreement, what happens to semiconductor exports? Korean semiconductor makers seem to sell a lot to China — should I actually be worried?
2026-09-18
Scenario branch: there's no "comprehensive deal" — what's actually at stake
Ahead of the September 24 Trump-Xi summit at the White House, the US and China are discussing tariff cuts on agriculture and energy (roughly $30 billion in trade covered) (CryptoBriefing; Spokesman, 2026-09-15). But US Trade Representative Jamieson Greer has made clear the summit's purpose is "managing the relationship, not a comprehensive trade deal" (FXStreet, 2026-09-17). The best the market can expect is expanded agricultural purchases (like soybeans) and partial tariff cuts — not a sweeping agreement covering semiconductors and technology broadly.
What the market is really watching isn't the tariff figures but three things: whether rare-earth export controls ease, whether semiconductor and advanced-chip equipment rules change, and whether the tone on Taiwan shifts (FXStreet; Saxo, 2026-09-17). Rare earths are China's key leverage — its 2025 rare-earth export controls actually rolled back the US's 145% tariffs (Malay Mail, 2026-09-17). Iran is also a variable. Trump wants China to use its influence over Iran, but China has no reason to give up discounted Iranian oil, a point where negotiations could snag (Malay Mail, 2026-09-17).
Why Korean semiconductors are genuinely at stake
China's share of Korean semiconductor exports isn't small. As of 2024, China was the single largest market, accounting for $32.8 billion, or 32.8%, of Korea's semiconductor exports (citing Hudson Institute, 2026). Today's report also noted Samsung Electronics' H1 2026 semiconductor exports to China reached roughly $62.5 billion, surpassing exports to the US — meaning structural exposure to China is only growing.
The problem is that these exports depend on US regulatory approval. Samsung Electronics and SK Hynix received Validated End-User (VEU) status in 2023, letting them bring US-made semiconductor equipment into their China plants, but that status was revoked in September 2025, and in 2026 they've been operating on short-term renewable licenses only (East Asia Forum, 2026-07; ITIF, 2026). Right now, Korean semiconductor exports to China stand on annually-renewed temporary permits the US government decides on.
Path by scenario
| Scenario | Condition | Impact on Korean semiconductors |
|---|---|---|
| Partial deal on agriculture/energy tariffs only | Base-case expectation, hinted at even by USTR | Limited direct impact, current state (short-term licensing) persists |
| Rare-earth/semiconductor rule easing alongside it | Low probability, China unlikely to easily give up leverage | Could bring favorable signals like VEU status restoration, stabilizing China business |
| Hardline rhetoric on Taiwan or friction over Iran | Geopolitical stress scenario | Risk of tighter semiconductor export controls, license reviews for China exposure |
| Talks collapse or summit falls apart | Low probability, both sides want to keep the summit on track | Partial reversal of the trade-optimism rally, short-term correction in semiconductors and EM assets |
So what should investors watch?
Focusing only on the tariff figures from this summit misses the point. For Samsung Electronics and SK Hynix shareholders, the real thing to confirm is whether the US Commerce Department signals any easing of VEU status or license-renewal conditions, and whether there's any separate mention of rare-earth or semiconductor-equipment export controls. Even if agricultural and energy tariff cuts are announced, that alone doesn't resolve Korean semiconductors' exposure risk to China. The next thing to watch is the timing of the Commerce Department's license-renewal announcement after the summit.