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Sprott Junior Copper Miners ETF drops 11% on AI capex concerns and rising Treasury yields

Market News
08 Jun 2026
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Bearish
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The Sprott Junior Copper Miners ETF (COPJ) fell 11% in one day due to a combination of weaker-than-expected AI semiconductor revenue guidance from Broadcom and a stronger-than-expected U.S. payroll report that raised fears of interest rate hikes. This caused copper prices to soften and Treasury yields to rise, hitting junior copper miners hardest due to their high leverage and sensitivity to both commodity prices and financing costs. Investors will be watching copper supply updates from Codelco, Chinese copper imports, and hyperscaler AI data center spending for signs of recovery or further decline in demand. The ETF's volatility reflects the risk and reward of exposure to junior miners tied to the evolving AI and electrification demand narratives.

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