Blue Bird is trading 5.99% up at $61.60 in pre-market on September 28, with no new company-specific announcement found to explain the rise. - This compares with the September 25 close of $58.12. - President Trump rejected Iran’s proposal to reopen the Strait of Hormuz, pushing oil higher and weighing on U.S. futures. This risk-off backdrop is not a clearly aligned explanation for Blue Bird’s rise.