Donald Trump's return to the U.S. presidency has triggered a volatile response in global financial markets. On his first day back in office, Trump announced new tariff policies affecting trade with Mexico and Canada, which contributed to market fluctuations. Despite initial concerns, global stock markets, including the S&P 500 and the Dow, closed higher, with the S&P surpassing the 6000 mark for the first time since late December. The dollar rebounded sharply following a previous decline, while Bitcoin experienced a surge. Analysts noted that Trump's mixed messaging on tariffs has left investors on edge, but the absence of blanket tariff increases appeared to alleviate some concerns. As markets brace for continued volatility, attention remains focused on the implications of Trump's policies for both domestic and international trade.