It's more that the US dollar has gained 30% on the Canadian dollar. The Canadian dollar has been relatively stable compared to most currencies while the US has been actively propping up the USD higher. You can't just compare two currencies -- you have to look at the whole market to have a reference point.
> the US has been actively propping up the USD higher
What does that mean?
Sounds like a reference to quantitative easing.
It must be a misunderstanding, since we both know QE reduces the value of a currency.
Yeah, I have no idea. Just taking a guess at what the poster above was hinting at :)