An entry sign stands outside a Costco Wholesale Corp. store in Villebon-sur-Yvette, France, (Photographer: Marlene Awaad/Bloomberg)

Costco Rises the Most in a Year After Renewal Rates Hold Steady

(Bloomberg) -- Costco Wholesale Corp. kicked off its biggest rally in a year after its latest results signaled that customers are staying loyal in the era of Amazon.com Inc.

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