Star Bulk Carriers is trading 4.17% higher at $29.54 after hours, with no clear company-specific announcement identified to explain the rise. - Shares closed at $28.36 on October 30. - The broad market was sharply lower; the dry-bulk freight index rose just 0.1%, while vessel-rate trends were mixed, so neither clearly explains the move. - The company website lists an October 9 partnership announcement as its latest press release.