美元兑加元下跌0.5%，至1.3482的16个月低点

Group 1 - The core point of the article is that the US dollar has depreciated against the Canadian dollar, reaching a 16-month low at 1.3482, reflecting a decrease of 0.5% [1] Group 2 - The decline in the US dollar's value against the Canadian dollar indicates potential shifts in currency trading dynamics and may impact related financial markets [1]