COST

Costco is a textbook high-quality compounder. Revenue has marched from $196B (FY2021) to $275B (FY2025), +8.2% in the latest year, while operating income grew faster (+11.8%) than sales — evidence the comparable-sales/SG&A-leverage engine the MD&A calls 'the most important driver of our profitability' is working. Net income reached $8.10B (+9.9%) and diluted EPS $18.21 (+10.0%). The thin 3.8% operating and 2.9% net margins look unremarkable in isolation, but that is the warehouse-club model: profit is carried by membership fees and razor-thin merchandise markups that the company deliberately protects to keep 'pricing authority,' which is exactly why ROE is a stellar 27.8%. The balance sheet is a fortress — $14.2B cash (+43%) against just $5.71B long-term debt, equity up 23.5% to $29.2B, and $13.3B of operating cash flow comfortably funding $5.5B of growth capex. There is little to dislike about the business itself.

The problem is the price, not the company. At $951.45 the stock trades at 52.2x trailing EPS that is compounding at roughly 10% — a PEG above 5 and a multiple that bakes in flawless execution for years. P/S of 1.5x is rich for a 2.9%-margin retailer. That valuation leaves no margin of safety and makes the stock vulnerable to any stumble in comparable sales or gross margin, both of which management flags as sensitive to gasoline-price swings, FX, and a deliberate willingness to hold prices steady through cost inflation ('negatively impacting gross margin... in the near term'). The 10-K is also explicit that 'higher tariffs are more likely to adversely impact rather than improve our results' — a live risk to a thin-margin importer.