Silver prices surged to their highest in almost 14 years on Wednesday, aided by worries about U.S. tariff policy, signs of tightness in the spot market and growing investor interest in alternatives to gold. Spot silver was up 0.3% at $39.40 per troy ounce as of 1354 GMT, its highest level since September 2011. Silver, both a precious and industrial metal, is up 36% this year, outperforming gold's 31% growth and coming within a whisker of the key $40-per-ounce mark. The metal hit a record high of $49 in 2011. U.S. President Donald Trump's plan to impose 50% import tariffs on copper from August 1 and the U.S. import ... (full story)