BoK Hawkishness and Undervaluation Drive BBH Won Call

Brown Brothers Harriman is making a concentrated case for the South Korean won, citing two overlapping drivers: a hawkish Bank of Korea (BoK) stance and persistent undervaluation in the currency. The call relies on a specific read of policy sequencing and macro risk appetite, not a simple extrapolation of rate differentials. For a trader building a watchlist, the setup filters out noise from the broader dollar cycle.

The BBH Won Thesis: Rate Support Meets Valuation Floor

The naive reading runs like this: a central bank that keeps rates high while the Federal Reserve signals cuts should support the domestic currency. The BoK has held its policy rate steady since early 2023, pushing the real rate above most developed-market peers. That differential alone does not guarantee won strength. What gives the BBH argument weight is that the hawkish stance comes during a global pivot toward disinflation, not against it. The Bank projects inflation to stay above target through the second half of 2024, reducing the chance of an early cut. That keeps carry-positive conditions alive longer than in the euro area or Canada.

Why the Simple Carry Trade Read Falls Short

A trader who buys the won purely because the BoK rate is higher than the Federal Reserve rate will burn through stops if risk-off liquidity fractures. South Korea is a high-beta market. When global equity volatility spikes, the won tends to sell off even if the BoK is hawkish. The better read is to watch the equity-currency correlation and speculative positioning. Weekly COT data on the won shows that speculative shorts have been building, which creates a potential squeeze trigger if the hawkish view is validated. Undervaluation matters here because it sets a lower bound for the selloff. BBH is betting that the fundamental case is strong enough to absorb periodic risk-off shocks, not that the won will rally in a straight line.