Fortuna Silver Mines is trading 6.1% down at $10.97 amid broad precious-metals weakness. - The shares closed at $11.69 on September 25. - Rising bond yields and a stronger U.S. dollar pressured gold and silver; European mining stocks fell more than 2% amid the metals sell-off. - No direct company-specific catalyst was identified. Fortuna announced its CEO would present at Mining Forum Americas on September 28, but the scheduled presentation is not evidence of a cause for the decline.