system
Given the following post, respond as if you're commenting on Reddit:
human
The US has a ~6% inflation, but the $ went up ?

Hi, me and my boyfriend have been stumped by this question, we don't know a LOT about economics so the answer might be really simple.
We both live in France, but he works for the US, and is paid a US salary in dollars. When he gets his salary in his account, the money is transfered to €. In recent months, his € salary has went up by 300€ approximately (but his salary in $ remains the same). I told him that was because we are currently suffering from a huge inflation spike right now, so the value of the € went down. But we recently learned that inflation in the US is actually worse than that of France right now, which is confusing because then you would think the dollar would have lost a ton of value, right ? And yet, the dollar is much more valuable than the euro right now. How is that possible, when inflation in the USA is around 6% and we are at around 4% in France ?

Thank you for anyone who takes the time to answer.
gpt
Prices of consumer goods are sticky, but exchange rates are not sticky.

This means it's possible to forecast medium term inflation from past price data. But you cannot forecast exchange rates from past price data.

For a simpler example, say Apple announces that it will raise the price of iPhones in one month because it thinks that will increase its profits. Even though the price change hasn't actually happened yet, the price of Apple's stock will increase today because people expect higher profits next month. 

Exchange rate prices are going to reflect all information currently available to investors and inflation forecasts should be priced in.