Currencies May 26, 2026 05:12 AM

BofA Warns Won May Remain Under Strain Despite Robust Trade Surplus

Bank of America points to portfolio flows and policy uncertainty as key drivers of USD/KRW ahead of May 28 policy events

By Avery Klein

Bank of America cautions that the South Korean won could face continued pressure from portfolio outflows and policy uncertainty even as a strong current-account surplus, bolstered by semiconductor exports, supports the external position. The firm highlights a critical policy window around the Bank of Korea rate decision and the National Pension Service committee meeting on May 28, followed by local elections on June 3, as central to the currency's near-term trajectory.

BofA Warns Won May Remain Under Strain Despite Robust Trade Surplus

Key Points

  • A strong current-account surplus, led by semiconductor exports, supports South Korea's external balance but is not viewed by BofA as sufficient on its own to secure the won.
  • May 28 is a critical policy date with both the Bank of Korea monetary policy decision and the National Pension Service fund management committee meeting; local elections follow on June 3.
  • Portfolio flows - including foreign equity outflows, hedging demand and overseas investment - are currently offsetting current-account strength and are the primary drivers of the won's behavior.

Bank of America says the Korean won remains vulnerable to downside pressures despite South Korea's healthy current-account surplus, which has been driven by strong semiconductor export receipts. The firm points to portfolio dynamics and policy uncertainty as the dominant forces affecting USD/KRW ahead of a cluster of policy events at the end of May.

The bank identifies May 28 as a pivotal date, when the Bank of Korea will announce its monetary policy decision and the National Pension Service will hold its fifth fund management committee meeting. Those events precede local elections on June 3. Together, BofA describes these dates as forming a concentrated policy window that could influence currency flows and market positioning.

BofA expects the Bank of Korea to keep interest rates on hold but to adopt a more hawkish tilt if inflation risks intensify via higher oil prices and foreign-exchange pass-through effects. The bank also notes that election-driven fiscal dynamics may shift toward measures aimed at boosting growth, which could complicate the overall policy stance and the interaction between monetary and fiscal policy.

According to the bank, a disciplined policy combination - consisting of a hawkish monetary stance alongside restrained fiscal expansion - would be supportive of the won. By contrast, a looser mix of monetary and fiscal policy risks exacerbating downward pressure on the currency. BofA emphasizes that the central concern is not the external balance itself, but how the policy mix would influence capital and portfolio flows.

The firm highlights several flow-related factors that are offsetting the strength of the current-account surplus. These include persistent foreign equity outflows, ongoing hedging demand, and continued overseas investment activity. In addition, allocation and hedging choices by the National Pension Service introduce an additional layer of uncertainty into near-term currency dynamics.

BofA concludes that the won's movements are increasingly being determined by portfolio dynamics rather than traditional macroeconomic anchors such as the current-account position. The bank's assessment frames the upcoming policy calendar as a key test of how policy choices will interact with capital flows to shape the currency's path.


Contextual note: The analysis focuses on portfolio flows, policy decisions and election-related fiscal dynamics as the primary determinants of USD/KRW near-term behavior. Where information is limited, the bank confines its conclusions to those factors explicitly cited.

Risks

  • Policy mix risk: A combination of looser monetary and fiscal policy could reinforce downward pressure on the won - this impacts financial markets and currency-sensitive sectors.
  • Flow uncertainty: Continued foreign equity outflows and hedging demand may negate the supportive effect of the current-account surplus, affecting investor sentiment and portfolio allocations.
  • Institutional decisions: Allocation and hedging choices by the National Pension Service add uncertainty to capital flows and market stability in the near term.

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