Best Stock to Buy Right Now: Costco vs. Amazon

Costco and Amazon, both leveraging successful subscription models, have delivered strong market returns, yet offer distinct investment theses. Costco, with a $390 billion market cap, demonstrates robust five-year growth (59% revenue, 71% operating income, 121% FCF) driven by international expansion and high membership retention, alongside significant e-commerce acceleration, though its valuation is currently elevated relative to its historical average. Amazon, despite slowing e-commerce growth, has diversified effectively, with AWS (17% revenue spike, operating income nearly doubled in Q1) and advertising (24% sales jump) becoming key earnings catalysts, providing exposure to high-growth tech sectors. The article concludes that Costco offers more stable, reliable growth, while Amazon provides higher-growth tech exposure with potential volatility, influencing investment preference.

Analysis

Costco (COST) and Amazon (AMZN) both leverage highly successful subscription models, with Costco reporting a 91% global membership renewal rate and Amazon boasting over 200 million Prime members. However, their core growth drivers and valuation profiles are diverging. Costco demonstrates strong fundamentals in its core retail business, evidenced by five-year growth in revenue (59%), operating income (71%), and free cash flow (121%), significantly outperforming peers like Walmart on the latter metric. The company is also showing significant acceleration in e-commerce, with sales rising 21% year-over-year in Q3 2024, and possesses considerable runway for international store expansion. This operational strength is reflected in its valuation, with the stock trading at approximately twice its 10-year average price-to-sales (P/S) ratio. Conversely, Amazon is transitioning into a diversified tech conglomerate as its core e-commerce growth slows to 5% in Q1 2024. The primary earnings catalysts are now its high-margin segments: Amazon Web Services (AWS) saw Q1 revenue spike 17% with operating income nearly doubling, while advertising services sales jumped 24%. Despite its diversification into high-growth tech sectors, Amazon's stock trades near its 10-year average P/S ratio, presenting a different valuation argument compared to the historically expensive Costco.

Key Decisions for Investors

• Investors should weigh Costco's consistent operational execution and accelerating e-commerce growth against its current valuation, which is trading at a significant premium to its 10-year historical average.
• For exposure to Amazon, investors should look past the decelerating retail sales and focus on the performance of high-growth, high-margin segments like AWS and advertising, which are now the primary drivers of operating income.
• The choice between the two stocks aligns with investment style: Costco suits investors seeking stable, predictable growth from a best-in-class retailer, whereas Amazon is better suited for those seeking exposure to high-growth technology sectors like cloud computing and digital advertising with a tolerance for greater potential volatility.