Signet Jewelers led major premarket movers with a 17% gain after reporting adjusted second-quarter earnings of $2.19 per share, above the FactSet estimate of $1.74, and raising its full-year earnings guidance. Mission Produce rose 7.5% after exceeding every FactSet analyst estimate for adjusted earnings per share and revenue in its fiscal third quarter. Casey’s General Store fell more than 10% despite beating expectations for fiscal first-quarter earnings and revenue, as fuel sales declined 0.3% year over year and prepared-food and dispensed-beverage sales grew less than expected. Apple shares edged lower ahead of an event where the company is expected to introduce new iPhones, including a foldable model. Energy stocks gained after Brent crude futures exceeded $100 a barrel for the first time since July. West Texas Intermediate, the U.S. benchmark, rose 2.14% to $95, while the XLE ETF (exchange-traded fund tracking an index) added about 1% and ExxonMobil advanced 1% before the bell.