Amazon vs. Walmart: Which Stock Will Outperform in 2026?

After Walmart outperformed Amazon in 2025 (WMT up >25% vs modest AMZN gains), the article argues Amazon is the higher-growth, cheaper stock for 2026 thanks to significant operating leverage in retail driven by AI and robotics (more than 1 million robots coordinated by its Deepfleet model), logistics and ad-targeting improvements that helped North America revenue rise 11% and adjusted operating income jump 28% last quarter, plus accelerating AWS demand and a data-center buildout; Amazon trades at about 29x forward P/E versus roughly 38.5x for Walmart. Walmart is framed as the more defensive play—the largest U.S. grocer and low-cost leader—leveraging Walmart+ and improved food and delivery offerings to fuel e-commerce growth (20%+ U.S. e‑commerce growth for seven straight quarters), nearly all of a 4.5% comp increase, and a 33% gain in Walmart Connect ad revenue. The author’s verdict: Walmart offers defensive stability, but Amazon’s operating leverage and AWS growth make it the preferred rebound candidate for 2026 (disclosure: the author holds Amazon and Motley Fool recommends both names).

Analysis

Walmart materially outperformed Amazon in 2025 (WMT shares up >25% versus modest AMZN gains), but the valuation gap now favors Amazon, which trades at a forward P/E of roughly 29x compared with Walmart's >38.5x. That sets up a contrast between defensive cash-flow exposure and cheaper growth optionality.

Amazon is exhibiting clear operating leverage in e-commerce driven by AI and robotics: the company reports more than 1 million robots coordinated by its Deepfleet model and uses AI for routing, warehousing and ad targeting. Those efficiencies helped North America revenue rise 11% last quarter while adjusted operating income jumped 28%, and AWS — described as the most profitable segment — is positioned to accelerate as Amazon builds out data-center capacity to serve AI demand.

Walmart’s repositioning toward groceries and services is making it a defensive retail stalwart: it is the largest U.S. grocer, leverages everyday-low pricing, and has grown U.S. e-commerce >20% for seven consecutive quarters, contributing nearly all of a 4.5% same-store sales gain and supporting 33% growth in Walmart Connect ad revenue. The author prefers Amazon as a 2026 rebound candidate but discloses ownership of AMZN and that Motley Fool recommends both names.

Key Decisions for Investors

• Consider a tactical overweight to Amazon for 2026 total-return exposure given its operating leverage, AWS-driven growth runway and lower forward P/E (~29x) versus Walmart, while limiting position size to reflect execution and macro risks
• Maintain a defensive allocation to Walmart for capital preservation and stable cash flows given its status as the largest U.S. grocer, sustained e-commerce growth (+20%+ seven quarters) and Walmart+ execution
• Monitor catalysts closely—Amazon's NA margin and adjusted operating income trends, AWS revenue acceleration and data-center spend, plus Walmart's e-commerce and pricing dynamics—and trim or hedge positions if execution or valuation momentum deteriorates