Skip to navigationSkip to main contentSkip to right columnADVERTISEMENTLawrence Nga, The Motley FoolSun, July 26, 2026 at 10:01 PM GMT+2 4 min readWhen MercadoLibre (NASDAQ: MELI) reported another quarter of strong revenue growth, investors quickly shifted their attention elsewhere:Operating margin narrowed. Logistics costs increased. Shipping subsidies remained elevated. These became investors' focus instead of the headline growth of 49%.Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a "Double Down" signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same "Total Conviction" signal is flashing for a company 1/100th the size of Nvidia. Continue »The market's concern was straightforward: MercadoLibre's growth is becoming more expensive. That's a fair concern, since profitability ultimately determines shareholder returns. But it also raises a more important question:What if today's margins tell us less about MercadoLibre's future than the strength of its ecosystem?Long-term investors should care about both.Image source: Getty Images.Margins tell you where the business is todayThere are many ways to analyze a business, of which operating margin is probably one of the easiest to understand and track.Higher margins usually signal pricing power, operating leverage, or disciplined execution. On the other hand, lower margins often suggest rising competitive pressure or heavier investment.And that's exactly why MercadoLibre's recent results worried investors. The company lowered free-shipping thresholds in Brazil, expanded its logistics network, and continued investing aggressively in Mercado Pago. Those decisions pushed costs higher and compressed profitability. For perspective, operating profit fell by 20% despite the massive revenue growth.Viewed quarter by quarter, the market's reaction makes sense. After all, nobody likes a lower profit.But here's the thing. Quarterly margins only inform us what the company is today. They don't explain what kind of business MercadoLibre will become over the next few years. And that's why investors should also focus on other leading indicators.The strength of the ecosystems creates tomorrow's marginsThe businesses that generate exceptional returns over the long run rarely maximize profits while they're building competitive advantages. Instead, they invest heavily to strengthen the ecosystem first.For instance, Amazon spent decades building fulfillment infrastructure before retail margins improved. Costco invests heavily in lowering merchandise margins to create extraordinary customer loyalty, making money solely from its memberships. Similarly, Uber in the early days prioritized network density over profitability.Terms and Privacy PolicyEU DSA contactPrivacy & Cookie SettingsMore Info