It’s important to note that actual currency exchange rates are not informed by relative purchasing power—exchange rates are determined by supply and demand in currency exchange markets.

A stronger US dollar ultimately means that your greenbacks have more purchasing power when paying for goods ... countries will be more expensive on a relative basis than before the currency ...

“And I’d rather not have to use it. But it’s a tremendous power over China.” The US Dollar Index, which measures the dollar's value relative to a basket of six foreign currencies — the ...