South Korea GDP Growth Outpaces Expectations, Yet KOSPI Drops

South Korea's gross domestic product expanded by 1.0% in the third quarter, driven by semiconductor exports. The Korea Composite Stock Price Index, however, has fallen 8.5% over the past three months, according to TradingView data.

The Bank of Korea reported the GDP increase on Oct. 27, which was more than three times its 0.3% forecast from August. Samsung Electronics and SK Hynix, together weighting about half of the index, are at the center of both the export surge and the stock decline.

Why Does South Korea's Stock Index Decline Even as Growth Accelerates?

Exports rose 2.3% led by semiconductors, machinery, and electrical goods, the Times reported. Facility investment gained 4.1% as companies purchased more equipment, including chipmaking machinery.

Private consumption slipped 0.2%, according to the Herald. The growth came from exports and factory investment, not household spending.

Real GDP increased 3.4% from a year earlier, after 3.7% in the second quarter, per BOK data. This marks the third consecutive quarter of expansion.

BREAKING: South Korea’s economy grew +1.0% QoQ in Q3 2026, marking its 3rd consecutive quarterly expansion, beating expectations of +0.8%.

Exports were the main driver, rising +2.3% on stronger semiconductor, machinery and electrical equipment shipments.

Facility investment…

— The Kobeissi Letter (@KobeissiLetter) November 1, 2026

Is the Market Expecting a Chip Downturn That GDP Figures Don't Reflect?

Goldman Sachs reduced its KOSPI target to 9,000 from 12,000 on Oct. 25. The bank argues that markets assume 2027 chip-sector earnings will fall 65%, a scenario it considers too bleak.

October exports hit a record $115.3 billion, with chips contributing $56.4 billion, or about 49%.

Cumulative exports surpassed $900 billion for the first time. The trade ministry says $1 trillion could be reached as early as November, a level only the US, China, and Germany have attained.

Can the BOK Maintain Tightening into a Chip Cycle Markets Are Skeptical Of?

The BOK kept its policy rate at 3.00% in October, but the chip boom keeps a November hike in consideration. Stricter policy would affect an economy where private consumption has already declined.

Chips provided about half of October's exports. A downturn in the memory cycle would therefore impact trade, factory investment, and the KOSPI simultaneously. The GDP data indicates the cycle is still driving output, while the stock market trades as if that drive is temporary.