
An Icon Economics blog argues the won should steadily appreciate as Brent's crash cuts Korea's oil import bill by an estimated $20-30 billion a year. It also cites Fed swap lines preventing a repeat of the March liquidity squeeze, with the BOK having tapped about $16.2 billion.
Lower oil import costs and stable dollar liquidity improve Korea's terms of trade and support the won. This is analysis of currency fundamentals rather than a commodity supply or demand event.
Not enough comparable past events yet for a historical read.
After 312 past bearish macro events, Crude Oil (Brent) moved a median -1.7% over 5 sessions (38% higher; middle half -5.4% to +2.3%), and -1.7% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.