The Canadian dollar weakened on Sept 21 as falling oil prices and expectations of further US tightening weighed on it. USD/CAD moved above 1.40 after the loonie hit its lowest level since Aug 7 the previous week.
Lower crude and a stronger US rate outlook weaken the commodity-linked loonie, which can lower the cost of Canadian exports to foreign buyers. The effect on feed prices is modest.
Not enough comparable past events yet for a historical read.
After 565 past bearish macro events, Crude Oil (WTI) moved a median -1.4% over 5 sessions (41% higher; middle half -5.9% to +3.0%), and -0.5% 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.
Reports of oil retreating around Sept 21 are consistent with the sharp WTI decline in the window, though the date is after the Sept 25 move and the article gives no cause for the drop.