Something weird is happening with Walmart, and I'm not talking about their rollback prices. The stock is trading at a 47x price-to-earnings ratio. For perspective, that's higher than Coca-Cola's 25x multiple, and Coke is a global brand with pricing power that would make any retailer jealous.

Let me be clear: Walmart is a retailer. They sell groceries, household goods, and cheap electronics to value-conscious shoppers. They're very good at it. But they're not a tech company, no matter how much Wall Street wants to pretend otherwise.

The stock has nearly tripled in three years, and the bull case seems to be: "They have a website now, so they're basically Amazon." Seriously, that's the pitch. Walmart's e-commerce platform generates ad revenue from brands wanting placement on their digital shelves, and suddenly they're trading like a growth stock.

Here are the actual numbers that should make you nervous: Revenue growth of around 5-6% in recent quarters—decent but not spectacular, especially when you factor in inflation. EBITDA growth has been flat post-2023, with the most recent quarter showing 3.35% growth. And yet the stock is priced like they're going to 10x earnings tomorrow.

The ad business is real, I'll give them that. Selling digital shelf space to Procter & Gamble and Unilever has created a high-margin revenue stream. But here's the problem: website traffic appears to be flattening. When your main growth driver stops growing, that's usually when reality catches up to valuation.

Compare this to Costco, which trades at a more reasonable multiple and has stronger customer loyalty, international expansion potential, and a membership model that creates recurring revenue. If I'm choosing between Walmart and Costco at current prices, Costco wins every time.

Look, I'm not saying Walmart is going bankrupt. They're a well-run company with scale advantages and a strong balance sheet. But a 47x earnings multiple for a retailer growing at 3-5% annually? That's 1999 dot-com bubble logic. "This time it's different because they have a website" is not a compelling investment thesis in 2026.

The reality is simpler: Walmart is a mature, defensive stock that should trade like a utility with better growth prospects. Defensive stocks typically carry lower multiples because their growth is predictable and limited. Slapping a tech company valuation on them doesn't change the underlying business model.

For investors, the question is whether this is momentum or mania. Momentum can persist longer than logic would suggest, especially when index funds keep buying regardless of valuation. But when sentiment shifts—and it always does—stocks trading at 47x earnings with slowing growth tend to get hit hard.

I'm not recommending you short Walmart. Timing the market is hard, and high-multiple stocks can stay irrational longer than you can stay solvent. But if you're thinking about buying Walmart at these levels, ask yourself: What am I getting that justifies paying nearly double Coca-Cola's multiple for a grocery store with a website?

If you can't answer that question with hard numbers and realistic growth projections, you're probably paying for hype rather than fundamentals. And in my experience, hype is the most expensive thing you can buy in the stock market.