Shares of e-commerce leader Amazon (NASDAQ: AMZN) and warehouse club Costco Wholesale (NASDAQ: COST) have both created significant wealth for shareholders over the long haul. But they are entering 2026 with very different valuation multiples — and very different underlying…

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Shares of e-commerce leader Amazon (NASDAQ: AMZN) and warehouse club Costco Wholesale (NASDAQ: COST) have both created significant wealth for shareholders over the long…