Greenland Mines is trading 10.11% down at $5.74, with broad selling in rare-earth and critical-minerals shares offering the stronger explanation for the decline. - No clear company-specific catalyst for October 7 was identified; peer declines and a sharper drop in the sector ETF point to sector weakness, with wider market caution also in the background. - Greenland Mines announced a $20 million share repurchase program on October 6, but available reporting does not link it to the October 7 decline.