In September, South Korea exported $16.6 billion worth of semiconductors, an amount equivalent to roughly one-fifth of its total merchandise shipments. This surge was not an outlier but part of a renewed upcycle powered by global demand for high-bandwidth memory (HBM), the key component in generative AI infrastructure. With Samsung and SK Hynix controlling the lion’s share of this segment, South Korea has reclaimed its status at the forefront of the global chip industry. But the boom masks a deeper structural imbalance – one that the trade data make unmistakably clear.
For nearly seven consecutive years, semiconductors have consistently accounted for around a third of South Korea’s monthly exports. The precise figure fluctuates, but the overall share remains entrenched. The line in the chart rises and falls with global cycles, but it never drifts far from the same center of gravity.
This reflects a deep structural overreliance. What once represented comparative advantage now risks becoming a single point of failure in the national economy.
Such export concentration is not unheard of. Oil rich states and mineral exporters routinely depend on one commodity for the bulk of their foreign earnings. But South Korea is not a commodity economy. It is a diversified industrial powerhouse, home to advanced manufacturing, a vibrant services sector, and cutting-edge research. That makes the semiconductor dominance more anomalous, and potentially more destabilizing. In essence, South Korea has built the economic profile of a resource exporter around a high-tech industry. That hybrid model now exposes it to the worst of both worlds: the cyclical nature of commodities and the strategic vulnerability of tech.
This fragility impacts the broader economy in several dimensions, and none more directly than trade. Because semiconductor prices move in large global cycles, they exert disproportionate influence on South Korea’s terms of trade. In boom periods, export revenues swell, the won strengthens, and households experience a temporary rise in purchasing power. But when chip prices fall, the reverse happens quickly: the currency weakens, imports become more expensive, and real incomes are squeezed. The effect is less visible than a financial crisis but just as systemic – a stealthy form of macro-volatility baked into the structure of trade.
South Korea’s overreliance on semiconductors also distorts investment in the country. Semiconductor fabrication plants – or fabs – are not built incrementally. They come in waves, with multibillion-dollar projects launched in clusters. That means investment in the chip sector causes sharp surges in demand for credit, construction, and capital goods. But when the cycle turns downward, as it did in 2023, those surges become cliffs. Activity stalls, and the drag spills over into other sectors that had been pulled into the orbit of chip-led expansion.
Perhaps most overlooked, though, is the growing fiscal exposure. As chipmakers account for an ever-larger share of corporate profits, they also form a rising share of tax revenues. Policymakers, far from hedging this risk, have become entangled in it, committing tens of billions of dollars to semiconductor subsidies, tax breaks, and infrastructure under the “K-semiconductor strategy.” This binds public finances to the private sector’s cycle. When chip exports rise, fiscal revenues and spending follow. But during downturns, tax receipts fall and the very subsidies designed to stabilize the sector risk becoming unaffordable. South Korea, in effect, has become pro-cyclical by policy choice.
What makes the current chip upturn especially precarious is how narrowly based it is. Unlike earlier waves of growth driven by broad consumer demand – for smartphones, computers, or memory – the present surge is tied to a single technological application: generative AI. And the buyers powering this demand are few in number, primarily large U.S.-based cloud providers. A regulatory shift, geopolitical complication, or capital spending slowdown in this segment could hit South Korea’s export earnings with near-immediate effect. The high level of HBM demand is matched only by the fragility of its source.
The South Korean government is not blind to this concentration. It has announced a plan to build a mega-cluster of fabs near Yongin as a means of entrenching the country’s lead in advanced chips. However, a more prudent approach would be to diversify around semiconductors – not away from them – by expanding into adjacent fields that are technologically demanding but less cyclically exposed. South Korea already has a competitive edge in sectors such as power semiconductors, chemical inputs, and advanced packaging. These industries are crucial to the semiconductor value chain but are not hostage to the boom-bust rhythms of AI hardware cycles.
Industrial policy must also evolve. Rather than offering cliff-edge subsidies that rise and fall with political cycles, Seoul could introduce milestone-based incentives to stagger investment over time. Establishing a sovereign chip stabilization fund – seeded with windfall profits during boom years – would allow the state to cushion downturns without compromising fiscal credibility. Similar models already exist in commodity economies like Chile and Norway, and South Korea has the institutional capacity to do the same.
This is not an argument against semiconductors. South Korea’s dominance in memory chips is a remarkable achievement, the result of decades of targeted policy, corporate ambition, and technical excellence. But persistent overconcentration in a single, highly volatile export undermines the resilience of its economy. The numbers show that this is a structural feature that is likely to persist absent proper intervention. And the longer semiconductors carry the weight of the national economy, the more likely it is that even this most advanced technology will buckle under the strain.
Image: Shutterstock ID: 2668764961. This article was originally published in The Diplomat.
Soeun Jeon
Soeun Jeon is a researcher at the National Women in Agriculture Association and a graduate student at Panthéon-Sorbonne University. She analyzes how political and economic forces intersect to shape inequality and social change.