Costco has raised membership fees for the first time since 2017. Explore how this change could affect its stellar stock performance and customer loyalty.Costco Wholesale (COST -0.77%) recently announced its first membership fee increase since 2017, raising questions about the potential impact on its stock performance.Costco remains one of the strongest forces in the retail sector, known for its robust growth and loyal customer base. The new fee hike, along with new membership scanners aimed at enhancing ser ...