The Bank of Korea (BOK) governor nominee's recent statement signals a significant policy pivot for managing currency volatility.
The core message is that the BOK will keep its policy rate at a neutral level, rather than hiking it to defend the weakening Korean won. This approach is grounded in solid reasoning. First, the current 2.50% policy rate is already within the estimated range for the neutral interest rate, which neither stimulates nor restricts the economy. With March inflation stable at 2.2%, close to the 2% target, there is little domestic pressure for a rate hike. Raising rates solely to combat a weak won would risk damaging the domestic economy, particularly concerning household debt and the housing market.
This policy shift comes in response to severe pressure on the currency. In March, the won breached the critical psychological level of 1,500 per U.S. dollar for the first time since 2009. The primary trigger was not a failing domestic economy—in fact, Korea posted a record current account surplus in February—but external shocks. A spike in oil prices above $100 per barrel, driven by escalating conflict in the Middle East, worsened Korea's terms of trade and sparked a flight to safety, putting immense downward pressure on the won.
So, if not interest rates, what's the solution? The answer lies in a more targeted, macroprudential tool: the National Pension Service (NPS). As Korea's largest institutional investor, the NPS's overseas investments require massive purchases of foreign currency, which weakens the won. The new strategy involves having the NPS adjust its operations to ease this pressure. This can be done in two main ways: first, by increasing its strategic currency hedging, which involves selling dollars in the forward market, and second, by issuing foreign-currency bonds to fund its investments instead of buying dollars in the spot market.
In conclusion, this represents a sophisticated policy mix tailored to Korea's unique situation. The BOK will use its main tool, the interest rate, to focus on domestic price stability. For external shocks hitting the currency, it will deploy more surgical instruments like managing the foreign exchange flows of the NPS. With oil prices having recently fallen, this strategy of maintaining a neutral stance while using market-based tools to absorb volatility appears increasingly credible.
- Neutral Interest Rate: The theoretical interest rate that supports the economy at full employment and maximum output while keeping inflation constant.
- National Pension Service (NPS): South Korea's public pension fund, one of the largest in the world. Its investment decisions have a significant impact on financial markets.
- Currency Hedging: A strategy used to protect against losses from fluctuations in currency exchange rates.