Costco maintained strong sales momentum in fiscal 2026, with mid-to-high single digit comparable sales growth. Membership fee income is increasing faster than sales, but the stock’s valuation remains high at 47 times earnings, raising questions about potential overvaluation. Despite solid business growth, investors are wary of the stock’s price.

In the first quarter of fiscal 2026, Costco’s total sales grew by 8.2% year over year to around $66 billion, with comparable sales up 6.4% and digitally enabled sales rising by 20.5%. The company’s robust international growth outpaces its U.S. market. Total sales in fiscal 2025 also saw an 8.1% increase year over year to approximately $270 billion.

Costco’s membership fee income surged by 14% in the first fiscal quarter to $1.33 billion, exceeding sales growth. This income boost was partly due to a membership price hike and increased membership base, with paid executive memberships up by 9.1% and total paid members rising 5.2%. However, concerns remain about the stock’s high valuation.

The stock’s price-to-earnings ratio of 47 and forward price-to-earnings of 42 are cause for caution, as they may be too high for Costco’s business, leading to potential valuation risk and underperformance. While Costco’s growth and competitive advantage are strong, the stock’s valuation leaves little room for error. Investors should weigh the risks before investing.

Investors are questioning whether Costco’s stock is overvalued, fairly valued, or undervalued, with opinions leaning towards fairly valued or overvalued. Competition from e-commerce giants like Amazon and other brick-and-mortar players could intensify, impacting Costco’s performance. The stock’s high valuation and competitive landscape suggest a cautious approach to investing in Costco.

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