This market resolves YES if Rio Tinto RTIT's trailing 6-month scandium oxide production exceeds 1500 kg on December 31, 2026.

What is being measured: Total Sc2O3 produced at Rio Tinto's Sorel-Tracy RTIT facility (Quebec, Canada), in kilograms, for the 6-month period ending 3 months before December 31, 2026. The 3-month lag ensures both quarterly operations reviews covering the window are published before settlement.

Measurement window:

• Settlement June 30: October (prior year) – March (current year) total

• Settlement December 31: April – September (current year) total

Unit note: If Rio Tinto reports in tonnes, multiply by 1,000 for kg.

YES if:

• Rio Tinto Quarterly Operations Reviews confirm cumulative Sc2O3 production exceeds 1500 kg for the applicable 6-month window

NO if:

• Cumulative Sc2O3 production for the window is ≤ 1500 kg per Rio Tinto reports

• If Sc2O3 is not separately disclosed in quarterly reviews: use Annual Report or Canada Growth Fund progress reports as proxy; if estimated output ≤ 1500 kg, resolves NO

• If no production data is available (pre-commissioning or not disclosed), resolves NO

See measurable definition: measurables/scandium/rio_tinto_scandium_output.measurable.yaml

Primary sources:

1. Rio Tinto Quarterly Operations Review (riotinto.com/investors) — RTIT minerals segment; Sc2O3 production table; published ~45 days post-quarter

2. Rio Tinto Annual Report (Form 20-F) — minerals/materials production data

Secondary sources: 3. Canada Growth Fund progress reports — RTIT expansion milestones and output 4. US DLA (Defense Logistics Agency) procurement announcements — offtake volume proxy 5. Fastmarkets / Asian Metal — RTIT production commentary and milestone news