The Bank of Korea has raised interest rates by a quarter point to 2.75%, the first increase since January 2023. The move responds to strong growth driven by exports of semiconductors for artificial intelligence.
The Bank of Korea (BOK) raised interest rates on Thursday for the first time in over three years, in a unanimous decision that sets the benchmark rate at 2.75%. The move, a quarter-point increase, marks the beginning of a new cycle of monetary tightening, following four consecutive cuts since late 2024.
The measure responds to the surge in semiconductor exports linked to artificial intelligence, which is driving faster-than-expected economic growth and persistent inflation. The BOK noted in its statement that this year's growth rate is expected to exceed the May forecast of 2.6% “considerably”.
A Consolidating Tightening Cycle
The BOK governor, Shin Hyun Song, has argued in recent months that inflation, growth, exchange rates, and risks to financial stability all pointed in the same restrictive direction, minimising the usual dilemmas. In his first monetary policy meeting in May, he already anticipated this shift.
The South Korean central bank warned that inflation will remain above target “for a considerable time”, opening the door to further increases. “It is considered necessary to maintain a monetary policy orientation consistent with further rate hikes,” the BOK indicated in its statement.
Markets are already debating how quickly the central bank might act again. Governor Shin is scheduled to deliver a speech this Thursday in Seoul where he may provide more clues about the pace of tightening.
The AI Chip Engine
Behind this policy shift is the boom in semiconductors for artificial intelligence. South Korea's current account surplus in the first five months of the year has already surpassed the record annual total for 2025, thanks to the surge in chip exports. The economy grew by 1.8% in the first quarter, well above expectations.
The BOK has emphasised that the current chip upcycle is different from previous ones, as it is driven by a structural demand for AI. Competitive investment from major global tech companies, combined with supply constraints for advanced chips such as high-bandwidth memory (HBM), should sustain the expansion for an extended period.
The International Monetary Fund (IMF) granted South Korea the largest upward revision of its growth outlook among the 30 largest economies in the world, raising its forecast for 2026 to 2.6%.
What It Means for Investors and the Global Economy
For investors, this increase marks the beginning of a tightening cycle that is likely to extend until 2027. The BOK maintains a restrictive stance and leaves open the possibility of further increases, although economists believe the central bank may opt to keep rates stable at the next meeting to assess the impact.
The decision also has implications for the South Korean won, which has weakened in recent months. Higher rates would help bolster the currency, analysts say. Additionally, the increase could cool leveraged investment in the stock market, which has been a source of recent volatility.
For tech companies that rely on South Korean chips, such as Samsung Electronics and SK Hynix, the monetary tightening should not dampen demand, as the AI momentum remains structural. However, rising credit costs could impact their long-term investment plans.
In the global context, the rate hike in South Korea contrasts with the trend of the US Federal Reserve, which has begun a cycle of cuts. This divergence could put upward pressure on the dollar against the won, although the BOK is confident that its restrictive policy will stabilise the currency.
Investors will closely monitor Governor Shin's speech and upcoming inflation and growth data to gauge when the next hike will come. For now, the BOK seems determined to maintain a restrictive course as long as the AI chip boom lasts.
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