Broadcom Sneezed and COPJ Investors Lost 11% In A Day And Learned That Copper’s AI Story Has a Pause Button Quick Read – COPJ fell 11% in one session yet retains a 93% one-year return, as junior miners structurally amplify copper price moves 2x to 3x. – Broadcom’s lighter Q3 AI…
venue guidance threatened the hyperscaler data center buildout that has become copper’s fastest-growing demand engine. – Watch hyperscaler capex commentary next earnings. If others echo Broadcom’s caution, the AI demand premium baked into junior miner valuations faces real repricing. – If you owned Sprott Junior Copper Miners ETF (NASDAQ:COPJ) on Friday morning, you watched it open near $45.37 and close at $40.37, an 11% single-day tumble on June 5, 2026
A $10,000 stake at Thursday’s close became roughly $8,900 by Friday’s bell. For a fund that returned 93% over the prior twelve months, this was the kind of day that gets your attention without quite gutting the position. Year to date, COPJ is still up 3%.
Over the past week, it has shed 9%. The trend reversed fast, and the reason is more interesting than “copper went down.” The week delivered a two-step macro punch. On Wednesday, Broadcom (NASDAQ:AVGO) guided Q3 AI semiconductor revenue light, raising questions about hyperscaler capex pacing, and the stock fell 13% to 15% on Thursday.