Why is COSTCO WHSL stock price going up?
Bulls say
Membership quality and loyalty
Rising penetration of higher-tier memberships and strong renewal rates boost recurring fee income and increase per-member spending, underpinning revenue resilience.
E-commerce and delivery partnerships
New partnerships with major delivery platforms and enhanced digital personalization expand same-day and scheduled delivery options, increasing online sales and member convenience.
Supply chain and margin improvement
Warehouse modernization, improved supply-chain efficiency, and private-label expansion support margin gains by raising productivity and lowering operating costs.
Membership growth slowdown
Slower total member additions and decelerating membership fee growth could limit future revenue expansion given the company’s dependence on paid memberships.
One-time tariff effects
Earnings benefited from tariff refunds, indicating part of recent profit improvement may be driven by one-time items rather than sustainable operating performance.
Category and execution risks
Weakness in specific merchandise categories and a limited rollout of checkout innovations create isolated performance gaps that can offset broader sales momentum.



