South Korea Q3 GDP Surges Well Past Forecasts on AI-Driven Semiconductor Exports

South Korea's economy grew far faster than expected in the third quarter of 2026, with the artificial-intelligence boom driving strong semiconductor shipments that more than offset lingering weakness in domestic demand. The Bank of Korea's advance estimate showed the outperformance was broad enough for Barron's to characterize growth as roughly three times the consensus forecast, a notable acceleration from the 0.6% quarter-on-quarter expansion recorded in the second quarter.

Exports were a key driver, rising 2.3% quarter-on-quarter and beating the central bank's own internal estimate. Construction investment, which had been a persistent drag on the economy, also returned to positive territory, climbing 0.7% quarter-on-quarter. Manufacturing expanded alongside semiconductors as global appetite for AI-related hardware continued to support order flows.

The result reinforces South Korea's position as a primary beneficiary of the AI infrastructure buildout, with semiconductor exports accounting for a disproportionate share of overall growth. Analysts had already revised the country's full-year 2026 growth forecast to around 3.3% earlier in the year, and the stronger-than-expected third quarter reading is likely to support that projection or push it higher.