The Canadian dollar fell against most of its peers on Thursday, despite a rebound in oil prices, which is one of Canada's main exports.
Efforts to contain the coronavirus pandemic are continuing around the world, especially after the emergence of the new highly spreading Delta variant.
As of 16:43 GMT, WTI crude August futures rose 0.9% to $72.8 a barrel, after hitting a high of $72.8 and a low of $70.6.
Brent August futures rose 0.8% to $74.01 a barrel, after hitting a high of $74.06 and a low of $72.1.
As of 17:02 GMT, CAD/USD fell 0.3% to 0.7982, after hitting a high of 0.8015, and a low of 0.7942.