Government borrowing costs across the single-currency bloc tumbled to record lows and euro zone blue-chip stocks hit their highest in more than a year after Lagarde was appointed
In a statement, Lagarde said that she was "honored to have been nominated" and would temporarily relinquish her responsibilities at the IMF while EU lawmakers look to ratify her appointment
Lagarde told Reuters in an interview, however, that such tariff threats were sapping business and market confidence, and could slow growth that is currently expected to improve next year
Christine Lagarde's remarks come as some central bankers around the world face increased pressure to bend to the objectives of political leaders and heads of state