President Donald Trump's "reciprocal" tariffs on dozens of countries took effect on Wednesday, including massive 104% duties on Chinese goods, deepening his global trade war even as he prepared for negotiations with some nations. Trump's punishing tariffs have shaken a global trading order that has persisted for decades, raised fears of recession and driven worldwide stocks sharply downward.The S&P 500 has shed nearly $6 trillion in value since Trump unveiled the tariffs a week ago, the deepest four-day loss since the benchmark's creation in the 1950s.