In a single session, the euro surged 2.15% against the dollar, reaching $1.109, its largest increase since 2015. This sharp rebound goes beyond the mechanics of exchange rates. It signals a sudden loss of confidence in the American currency. Through this shift, markets seem to be reevaluating the balance of power between major currencies, in a context where macroeconomic signals and the choices of central banks are reshaping the lines of monetary fracture.