The dollar rebounded sharply on Tuesday after plunging hours earlier as Donald Trump's first day back in the U.S. presidency brought mixed messaging on tariffs and highlighted investors' sensitivity to headlines about trade policy.

U.S. stock market futures rose as Donald Trump was sworn in a second time as U.S. president as investors bet a series of immediate actions by him would boost the economy, especially in areas like the banking and energy sectors.

Stocks were pointing higher ahead of the first trading day of the week. But traders are bracing for more volatility on Donald Trump’s first full day in office as president in his second term. While markets were closed on Monday for the Martin Luther King,