BHP has approved the largest single expansion at its Escondida copper mine in Chile since acquisition. The dollar figure, US$14.7 billion, is significant. The strategic message underneath it is more so.

Copper is now the metal BHP wants to talk about. Iron ore remains the biggest earner today, but the ten-year capital deployment is shifting decisively toward copper.

Why now

The bet is on electrification. Every EV requires roughly three times the copper of an internal-combustion vehicle. Every wind turbine and solar installation is copper-intensive. If the energy transition proceeds even at a moderate pace, global copper demand doubles in a decade. BHP is positioning for that.

The risk, of course, is that the transition slows or that copper substitutes emerge at scale. Neither risk is central to any economist's current base case, but the timeline is long enough that both remain possible.