Copper's on fire right now. The red metal is posting its longest winning streak since 2017, riding high on December momentum that's being driven by growing concerns around supply chain disruptions.

Here's what's interesting: copper doesn't just move in a vacuum. When supply chain pressures mount—think production delays, logistics bottlenecks, geopolitical tensions—you typically see a flight toward hard assets and commodities. Investors get nervous, and copper becomes a proxy for real economic stress and industrial demand.

The December surge signals something worth paying attention to. If supply chain woes keep piling up, we could be looking at sustained pressure on resource availability. That ripples across everything: manufacturing costs, energy prices, even semiconductor production. For traders monitoring macro trends, copper's current performance is basically a canary in the coal mine for broader economic headwinds.