Bank of Korea Warns AI Chip Dependence Is a Financial Stability Risk

South Korea's economy is riding a wave of demand for artificial intelligence (AI) chips, with nominal GDP expanding 21.9% in the first half of 2026.

Semiconductors alone account for nearly 70% of that growth.

How the AI Chip Boom Is Driving South Korea

The KOSPI, South Korea's benchmark stock index, is led by semiconductor heavyweights Samsung Electronics and SK Hynix. These two firms now derive roughly half of their combined market value and most of their earnings growth from the first six months of 2026.

The Bank of Korea reports chip revenues at a level not seen since the 1970s. In certain months during 2026, semiconductor exports have surpassed 40% of the nation's total outbound shipments. Real GDP growth projections have been raised to 3.3%-3.5% for the year.

The surge is directly driven by global appetite for high-bandwidth memory (HBM) and advanced DRAM chips. Nvidia, AMD, Microsoft, Google, Amazon, Meta, and Oracle all rely on Samsung and SK Hynix for AI accelerator memory. Along with Micron, these two are the only large-scale worldwide suppliers of such advanced chips.

The rally has also altered market dynamics across the region. Leveraged ETFs listed in Hong Kong that track major Korean tech names grew more than 20-fold during the first half of 2026, according to the central bank's report released this week.

What Happens if the AI Chip Cycle Reverses?

Analyst David K. Williams put the concentration starkly after the Bank of Korea's report. The trade has grown so large that the central bank now views it as a financial stability concern, rather than just an equity rally supported by solid fundamentals.

A slowdown in global AI infrastructure spending anticipated for 2027 or 2028 would have systemic repercussions for the Korean economy. Heightened Chinese competition in memory chips could worsen the impact. Exposure is spread across supply chains, financial markets, and household wealth throughout the country.

The Bank of Korea already points to signs of vendor financing reminiscent of the dot-com era. Excess liquidity is flowing into real estate and leveraged instruments, raising the risk of bubbles. Traditional manufacturing, youth employment, and domestic demand remain weak while chips dominate the conversation.

Structural issues add to the medium-term difficulties facing the nation. South Korea has the world's lowest fertility rate, near 0.7, alongside an aging population. Household debt is elevated, and external shocks such as oil prices above $100 or trade disputes would further amplify vulnerabilities.

Global markets would react immediately if Korean production faltered. Nvidia and AMD stock prices are tied to Korean chip output. AI-focused funds and semiconductor indices would undergo rapid repricing. A Chinese push to accelerate memory production could quickly reshape the supply chain.