Steel and iron ore plunged the most since March on escalating fears over a global trade war as China vowed to retaliate after President Donald Trump threatened tariffs on another $200 billion of Chinese goods. Copper extended losses among metals, while gold climbed on haven demand. Futures for steel reinforcement bar in Shanghai fell as much as 4.3 percent, the biggest drop since March 29, while iron ore in Dalian slumped 6.4 percent, the most since March 23. The decline in iron ore took prices to the lowest level in two months, while steel continued its retreat from a three-month high. Trump has instructed the U.S. ... (full story)