Walmart vs. Costco: Which Stock Is the Better Buy?

Core Insights - Comparing Walmart and Costco reveals both companies as durable businesses with strong sales growth across various economic conditions [1][2] Walmart's Performance - Walmart's fiscal fourth quarter (ended Jan. 31, 2026) saw a revenue increase of 5.6% year over year, with adjusted earnings per share rising over 12% to $0.74 [5] - Comparable store sales in Walmart U.S. increased by 4.6%, driven by a 2.6% rise in customer transactions, while Sam's Club reported a 2.8% growth in comparable sales [5] - Global e-commerce sales surged by 24%, now accounting for 23% of total net sales, and the advertising business grew by 37% [7] - Operating income rose by 10.8%, with management attributing this growth to improved e-commerce economics [8] - Walmart's stock trades at approximately 44 times the midpoint of fiscal 2027 adjusted earnings-per-share guidance, necessitating strong comparable sales growth and margin expansion for future success [9] Costco's Performance - Costco reported net sales of $68.2 billion for its fiscal second quarter (ended Feb. 15, 2026), reflecting a 9.1% year-over-year increase, with comparable sales rising 6.7% when adjusted for gasoline prices and foreign exchange [10] - Membership fee income grew by 13.6% year over year to $1.36 billion, benefiting from a fee increase implemented in late 2024 [11] - Adjusted digitally enabled comparable sales soared by 21.7% in fiscal Q2, with continued strong growth in February [13] - Costco's stock trades at a high price-to-earnings ratio of about 54, indicating a need for consistent growth to justify its valuation [14] Investment Comparison - Both Walmart and Costco are performing well, but Walmart is viewed as the slightly better investment choice due to its lower premium valuation and diversified revenue streams, particularly in advertising [15][16] - Costco's strong growth is acknowledged, but its high valuation leaves little room for error, making Walmart's evolving business model a more attractive option at current prices [17]