Do interest-rate differentials explain dollar moves without a political risk premium?
Core argument: The fall in the trade-weighted Dollar against the G10 maps almost entirely into interest differentials, measured by the 2y2y forward trade-weighted rate differential of the US against the same set of countries.
The fall in the Dollar maps almost entirely into interest differentials. The left chart shows the trade-weighted Dollar against the G10 and the 2y2y forward trade-weighted rate differential of the US against the same set of countries. It’s tempting to think that a Trump risk premium is building, because the Dollar is down more than the rate differential. But looking at “levels” is misleading in this regard, because it compounds a bunch of moves that have nothing to do with the Dollar. The right chart uses the same data, but looks at daily changes in the rate differential (horizontal axis) and the Dollar (vertical axis). I differentiate between pre- (black dots) and post-inauguration (blue dots) data points and highlight the last observation (Jun. 30, 2025) just like I do in the left chart. As expected, there’s a positive link between the rate differential and the Dollar. There is no discernible difference between pre- and post-inauguration data. Things have gotten noisier - no question there - but the positive link is basically the same.

