Starbucks' Q4 fiscal 2026 global comparable store sales face balanced trader sentiment, with 5-7% and 7-9% brackets holding nearly equal implied probabilities around 30% each. Strong Q3 momentum at +7.9%—driven by 4.2% transaction growth and operational initiatives like the Green Apron Service Model plus targeted promotions—provides a solid base, yet management guided full-year global comps near 6% amid tougher year-over-year comparisons and variable consumer spending. North American results, which dominate the metric, benefited from portfolio optimization including select store closures, while international trends and rivals like Dutch Bros highlight ongoing competitive pressure in the quick-service coffee segment. Earnings on October 29 will clarify whether traffic gains sustain or moderate toward guidance.