Copper just hit a historic milestone—London spot prices surged 4% today to $13,000 per ton, smashing previous records. The metal is already up a stunning 42% year-to-date, marking its strongest performance since 2009. The surge reflects growing trader concerns over US import tariff policies, which typically signal elevated risk sentiment and drive speculation across commodity and financial markets. For crypto investors tracking macro trends, copper's momentum often precedes moves in risk assets, making this rally worth monitoring as a barometer of global economic positioning.