Walmart Inc. (WMT Quick QuoteWMT - Free Report) and MercadoLibre, Inc. (MELI Quick QuoteMELI - Free Report) are strengthening their competitive positions through digital innovation, expanding customer engagement and investments in their respective ecosystems. With evolving consumer preferences, technological advancements and profitability trends shaping their growth trajectories, a closer assessment of their fundamentals, earnings expectations and valuations can help identify the more promising investment opportunity.

Walmart, with a market cap of around $949.6 billion, is a global omnichannel retail giant with an extensive store network and a growing digital ecosystem spanning e-commerce, advertising, marketplace, membership and fulfillment services. Its scale, price leadership and expanding higher-margin businesses support its long-term growth prospects.

MercadoLibre is a leading e-commerce and fintech platform in Latin America, operating an integrated ecosystem across online commerce, payments, credit, advertising and financial services. Its expanding logistics infrastructure, Mercado Pago adoption and technology-driven initiatives provide multiple avenues for growth. The company currently has a market cap of $85.2 billion.

The Case for Walmart

Walmart's growth prospects are supported by its extensive retail network, competitive pricing and strengthening omnichannel capabilities. Its broad merchandise assortment and focus on affordability continue to attract shoppers across income groups, supporting customer traffic and market share gains. The company's vast store footprint also provides a strategic fulfillment advantage, enabling faster deliveries and greater shopping convenience.

Digital transformation remains a key growth catalyst. Walmart continues to benefit from growing e-commerce penetration, marketplace expansion and improved fulfillment capabilities. Faster delivery services are encouraging repeat purchases and strengthening customer engagement, supporting Walmart+ membership adoption. The company's ability to leverage stores for online order fulfillment also provides opportunities to improve delivery economics.

Its evolving business mix is another upside. Higher-margin revenue streams, including advertising, membership, marketplace services and data solutions, are becoming increasingly important contributors. These businesses, alongside supply-chain automation and improving delivery efficiency, are supporting e-commerce profitability. Walmart is also extending its digital platforms and membership offerings across international markets, creating additional opportunities for operational efficiencies and scalability.

Nevertheless, pharmacy-related deflation, rising healthcare and claims costs, higher depreciation expenses and continued investments in pricing and customer experience remain concerns. These factors could constrain near-term margin expansion. Despite such challenges, Walmart's resilient retail operations, growing digital ecosystem and improving business mix remain encouraging. Management's raised fiscal 2027 outlook on its second-quarter earnings call further reinforces confidence in its growth trajectory.

The Case for MercadoLibre

MercadoLibre's growth prospects are underpinned by its integrated commerce and fintech ecosystem, which encourages higher transaction frequency and broader service adoption. Increasing engagement across its marketplace and Mercado Pago platforms is strengthening customer relationships and creating opportunities for long-term monetization. Its expanding user base and growing adoption of multiple services reinforce the ecosystem's competitive position.

The commerce business continues to benefit from wider product selection, improving logistics capabilities and initiatives such as lower free-shipping thresholds in Brazil. Meanwhile, Mercado Pago is expanding across digital payments, merchant acquiring, savings products and credit services. Investments in artificial intelligence are also enhancing search relevance, advertising effectiveness and customer personalization, supporting engagement and operating efficiency.

However, profitability remains a significant concern. Aggressive investments in shipping incentives, fulfillment infrastructure and customer acquisition continue to pressure commerce margins. Lower seller take rates, promotional initiatives and rising acquiring expenses could further constrain operating leverage. Higher payment-device costs and logistics expenses also present challenges to near-term margin recovery.

The expanding credit portfolio introduces additional risks, particularly if economic conditions weaken and delinquencies rise. Intensifying competition, foreign-exchange volatility and regulatory uncertainties across Latin America present further challenges. Sustained investment requirements and profitability pressures could limit near-term earnings growth despite MercadoLibre's attractive long-term opportunities.

How Are Earnings Estimates Shaping Up for WMT & MELI?

For Walmart, the Zacks Consensus Estimate for the current fiscal year's earnings has risen by a penny in the past 30 days to $2.88 per share, indicating year-over-year growth of 9.1%. The consensus estimate for the next fiscal year has remained unchanged at $3.22 per share, suggesting growth of approximately 12.1%. 
 

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For MercadoLibre, the consensus mark for the current fiscal year's earnings has declined over the past 30 days to $38.09 per share, indicating a fall of 3.3% year over year. The consensus estimate for the next fiscal year has dropped to $55.19 per share, but it suggests growth of 44.9%. 
 

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For Walmart, the upward revision in current-year earnings estimates and stable next-year projections indicate growing analyst confidence in its earnings potential. For MercadoLibre, downward estimate revisions suggest near-term caution, although expectations for strong earnings growth next year point to optimism about a potential recovery.

WMT vs. MELI: How Have the Stocks Performed in a Year?

Walmart shares have gained 15.7%, reflecting investor optimism surrounding its resilient business model, consistent operational performance and growing digital capabilities. Meanwhile, MercadoLibre shares have declined 26.6%, as concerns over profitability and elevated investment spending have weighed on investor sentiment despite its expanding operations.

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WMT & MELI: Assessing Their Valuation Multiples

Walmart currently trades at a forward 12-month price-to-earnings (P/E) ratio of 38.09, slightly below its one-year median of 38.73. MercadoLibre’s forward P/E of 32.20 also stands below its one-year median of 34.19. Both stocks are trading below their respective historical median valuations, suggesting relatively more attractive entry points, although their current multiples continue to reflect expectations for future earnings growth.

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WMT or MELI: Which Stock Looks Better?

MercadoLibre's expanding commerce and fintech ecosystem offers strong long-term growth potential, but margin pressures, credit-related risks and macroeconomic uncertainties remain concerns. Its demanding valuation also increases sensitivity to execution challenges. Walmart, meanwhile, benefits from resilient retail operations, expanding digital capabilities and growing higher-margin businesses. Despite its elevated valuation, consistent execution, improving e-commerce profitability and greater earnings visibility strengthen its investment appeal. Supported by operational stability and steady growth prospects, Walmart appears to be the more attractive choice at present.

WMT currently carries a Zacks Rank #3 (Hold), whereas MELI has a Zacks Rank #4 (Sell).

You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.