Costco: momentum watch

Costco is trading like a stock that investors do not want to wait on. Shares closed at about $1,030 on April 8, 2026, after gaining 1.7% in a single session, and traders are watching the stock push back toward record territory after months of grinding higher. (finance.yahoo.com) The reason people call Costco “unstoppable” is not mystery-story hype. The company just reported March net sales of $28.41 billion for the five weeks ended April 5, up 11.3% from a year earlier, and first-31-week sales of $173.26 billion, up 9.1%. (investor.costco.com) That sales number matters because Costco is already enormous. Growing revenue by roughly 9% when you are already selling more than $170 billion of goods in 31 weeks is closer to turning a cargo ship faster than a speedboat. (investor.costco.com) The business itself is built to look boring on the surface and powerful underneath. Costco runs membership warehouses, keeps a limited selection of items, sells them fast, and uses that rapid inventory turnover to keep prices low and volume high. (investor.costco.com) That model keeps producing the two numbers Wall Street cares about most here: steady traffic and steady renewal. In fiscal second quarter 2026, net sales rose 9.1% to $68.24 billion, while comparable sales were positive across the United States, Canada, and other international markets. (investor.costco.com) Online sales are adding another engine. Costco said e-commerce comparable sales rose 16.9% in the fiscal second quarter of 2026, which gives investors a rare combination: a warehouse retailer with physical-store traffic and a digital business still growing at a much faster clip. (investor.costco.com) The catch is the price tag on the stock. Yahoo Finance lists Costco at a trailing price-to-earnings ratio above 58, which is expensive for a retailer and leaves very little room for a bad quarter, a margin wobble, or a slowdown in member spending. (finance.yahoo.com) That premium has survived because Costco almost never gives investors the dramatic miss that breaks momentum names. The company’s investor calendar shows monthly sales updates on April 8 and May 6 and fiscal third-quarter earnings on May 28, so the next test of the “unstoppable” trade is only weeks away. (investor.costco.com) So the story around Costco is not just that the chart looks strong. It is that a retailer with more than $173 billion in sales through 31 weeks is still growing fast enough that traders are willing to pay a luxury multiple for a bulk-warehouse business. (investor.costco.com)