This market resolves YES if Rio Tinto or BHP has publicly announced board approval (a final investment decision) to fund full construction of the Resolution Copper mine near Superior, Arizona, on or before December 31, 2028.
YES if: a Rio Tinto or BHP press release, stock-exchange filing, or annual/half-year report states that full development or construction capital for the Resolution Copper mine has been approved.
NO if: only early works, shaft sinking, studies, permitting, or a partial/staged early-mine phase have been approved, or there is no company-confirmed approval. Media reports alone do not count.
Once approval is announced the market resolves YES even if the project is later deferred.
Context: Resolution Copper (Rio Tinto 55%, BHP 45%) is the largest undeveloped copper deposit in North America. The Oak Flat land exchange closed in March 2026 and the Ninth Circuit denied rehearing in September 2026. No construction decision has been announced as of November 2026.
Resolution sources:
Rio Tinto media releases and LSE/ASX announcements (riotinto.com/news)
BHP ASX announcements (bhp.com/news)
Rio Tinto and BHP annual and half-year reports
Resolution Copper project communications (resolutioncopper.com)
1,000