Just caught something interesting in Walmart's latest earnings that most people are probably overlooking. Amazon finally took the crown as the biggest company in the world by sales, knocking Walmart down to number two. But here's what makes this worth paying attention to — Walmart isn't losing ground. It's actually thriving in the exact space where Amazon dominates.

The real story is in the numbers. Walmart's e-commerce sales jumped 24% in the fourth quarter, with U.S. online sales up 27%. That's not just growth, that's the kind of momentum that matters. What's crazier is their expedited delivery channels — the stuff they're calling store-fulfilled orders — grew over 50%. In China, e-commerce revenue climbed 28% and now represents more than half their total sales there.

So why is Walmart pulling this off when it was late to digital? Simple: 5,200 physical stores. Amazon built a distribution empire to compete. Walmart already had one. With 90% of Americans living within 10 miles of a Walmart, they're now using those stores as fulfillment hubs. In their most recent quarter, 35% of store-fulfilled orders hit customers within three hours. That's not just competitive — it's a genuine advantage that the biggest company in the world by Amazon's metric can't easily replicate.

There's more to it too. Customers get flexibility — same-day delivery, curbside pickup, or just walking into a store if they want. Meanwhile, Walmart's advertising business is printing money. Ad sales jumped 37% year-over-year, and membership fees climbed 15%. These are higher-margin revenue streams that traditional retail doesn't usually have.

Management's guidance was a bit muted after earnings dropped, which sent the stock down briefly. They're expecting modest growth from physical stores but continued strength online. Realistically, Walmart probably won't overtake Amazon in pure e-commerce volume, but that's not really the point. The biggest company in the world by sales might be Amazon now, but Walmart has carved out something different — a hybrid model that leverages what it does better than anyone else.

The long-term picture looks solid. Walmart's discount positioning creates customer loyalty even when the economy tightens. The store network gives it reach across America that's hard to beat. And e-commerce growth should keep rolling. For investors, this is the kind of company that tends to quietly compound returns over time. Not flashy, but reliable.