Resolution Criteria: This market resolves YES if, by Feb 1, 2031, credible sources (e.g., USGS Mineral Commodity Summaries, IEA reports, or BloombergNEF data) confirm that U.S.-sourced battery-grade lithium production (including refined output from domestic mines, recycling, and new processing facilities) is estimated to account for more than 10% of total global battery-grade lithium supply for 2030 or any previous year. "Battery-grade" refers to lithium carbonate equivalent (LCE) suitable for EV and energy storage batteries. If data is unavailable or ambiguous, resolve NO.