Amazon and Costco have tracked closely over three years, but investors see a different path forward

Amazon’s stock performance over the last three years has looked less like a runaway winner and more like a steady peer comparison. In a new market note published by Yahoo Finance, the investment history of two retail-focused names, Amazon (AMZN) and Costco, is used to frame how investors’ returns could look after a similar starting point and time horizon.

The piece focuses on the idea that, while the two companies are in different segments and business models, their stock results over the past three years have not been wildly different. The author’s framing suggests that both have delivered meaningful gains, but that the size of those gains may surprise people who expect large gaps between “high growth” and “steady demand” narratives.

Amazon’s central differentiator is that it operates across multiple engines, including online retail, third-party services, subscriptions, advertising, and cloud computing through Amazon Web Services (AWS). That mix can influence how the market prices the company in different economic environments, particularly because AWS can respond to shifts in enterprise spending while retail and advertising can respond to consumer demand and online shopping trends.

Costco, by contrast, is often associated with a membership-based retail model and a focus on consistent merchandise turnover. That business structure tends to draw comparisons to “defensive” consumer exposure, though the exact drivers of its share-price movement can differ from Amazon’s, especially when technology and cloud spend move.

In the Yahoo Finance comparison, the main takeaway is less about which company “won” over the three-year window and more about where each stock may have room to move from here. The article states that the gains “may surprise,” and that one of the two stocks has more upside potential, even though the past three years’ performance has not been as divergent as many investors might expect.

The market note does not appear to rely on Amazon management disclosures in its framing, and it offers no operational updates in the way a company filing or earnings release would. Instead, it treats the question as a simple wealth-and-return comparison, using the starting investment and today’s valuation implied by the stock chart.

What remains unclear from the published comparison is the specific magnitude of each investment’s gain. The article headline indicates there are concrete “today” dollar amounts tied to the $5,000-in-each scenario, but without the detailed figures reproduced here, readers should treat the exact return percentages and end values as something to confirm in the underlying post.

Looking ahead, the comparison underscores how investors can arrive at different forward-looking conclusions even when backward-looking performance appears similar. For Amazon, markets may continue to anchor on AWS demand, advertising momentum, and retail profitability trends. For Costco, expectations may remain tied to membership growth, store expansion, and consumer spending resilience. Investors will likely watch whether the next earnings cycles widen the gap the article suggests could emerge.