On Thursday, the Bank of Korea decided to raise its key interest rate by 25 basis points to 2.75%. This is the first monetary policy tightening since January 2023. The move is driven by accelerating inflation and a weakening national currency—at the start of summer, consumer prices in the country hit a three-year high of 3.2%.
Against this backdrop, the local stock market faced significant volatility. At the forefront of the decline were the largest memory chip manufacturers—SK Hynix and Samsung Electronics. The value of these giants' securities dropped sharply during Thursday's trading session.
Inflation and Currency Pressure: Key Drivers of the Decision
Bank of Korea Governor Shin Hyun-son, who took office in April, had previously signaled a likely rate hike. The decision aligned with the forecasts of most economists. The main factors were rising inflation and a weakening won: since the start of the year, the national currency has fallen 2.93% against the dollar, and in the first half of June, it hit a seventeen-year low, dropping to 1,561.5 per dollar.
Despite currency pressure, South Korea's economy benefits from demand for artificial intelligence infrastructure. In the first quarter, GDP grew by 1.8%—the fastest quarterly growth in over five years. The government raised its 2026 forecast to a five-year high of 3.0%. However, local experts warn of risks from large bonus payments in the tech sector, which could drive up wages and create additional pressure on the consumer market.
Impact on Stocks and the Crypto Market
The financial regulator's decision will have a long-term impact on both traditional stocks and the digital asset sector. South Korean investors traditionally account for a significant share of the global cryptocurrency market, and the country stands out for its huge trading volumes on local platforms like Upbit. The rise in borrowing costs naturally reduces the amount of free liquidity available for high-risk operations.
The KOSPI index fell nearly 6.0% to 6,852. AI chip maker SK Hynix plunged 11.05% to 1,852,000 won, following a 15% drop earlier in the week. Samsung Electronics shares lost more than 3%. Higher interest rates could intensify pressure on the market: financial conditions will tighten, and investors may start moving away from fast-growing tech stocks.
Specialist economists forecast another rate hike to 3.00% by the end of this year. It remains unclear whether retail investors will adopt a wait-and-see approach or begin actively reallocating available capital.
My expertise: South Korea remains one of the key barometers for the global crypto market. Monetary tightening here is not a local episode but part of a global trend to combat inflation. For crypto investors, this means the era of "cheap money" is definitively over, and the market will now reassess risks. In the short term, expect increased volatility, especially in altcoins sensitive to Asian liquidity flows.