Key Highlights

● Walmart shares have fallen sharply, most recently closing at $103.84, down 9.15%, a rare double-digit-magnitude move for the mega-cap retailer.

● U.S. comparable sales excluding fuel rose about 2.6%, decelerating from roughly 4.1% in the prior quarter and marking among the slowest paces of growth in about six years.

● Adjusted EPS of about $0.81 beat consensus near $0.74, but the beat was helped by approximately $2.9 billion in Tariff refunds that added roughly 7.5 percentage points to operating-income growth.

● The company raised full-year net-sales growth guidance to roughly 4% to 5% but guided third-quarter EPS to about $0.62 to $0.64, below the roughly $0.68 the Street expected.

Walmart (NASDAQ:WMT) does not usually feature on lists of the day's biggest losers. As the largest retailer on earth and a low-beta staple of countless portfolios, its shares tend to move in modest increments. That makes the reaction to its latest Quarterly Report notable: on 20 August 2026 the stock fell roughly 8% to 9%, sliding from a prior close near $114 toward the $104 area, according to reporting from multiple financial news outlets. For a company of Walmart's size, a one-session move of that magnitude erases tens of billions of dollars in Market Value and qualifies as a genuine sell-off rather than routine noise.

The decline is firmly earnings-driven and well documented, so the more useful question is why a quarter that beat on profit and came with a raised full-year outlook was met with such a negative response.

What the quarter showed

Walmart's fiscal second-quarter results carried a classic "beat-but" profile. Adjusted Earnings per share came in around $0.81, ahead of consensus near $0.74, and total Revenue was roughly $187.9 billion, per coverage of the report. E-commerce remained a standout, with global online sales growing about 23% and U.S. e-commerce up around 24%, evidence that Walmart's digital flywheel, Advertising and marketplace businesses continue to compound.

The problem sat in the comparable-sales line. U.S. comparable sales excluding fuel rose about 2.6%, decelerating sharply from roughly 4.1% in the prior quarter and falling short of consensus near 3.8%. Reporting characterized it as among the slowest paces of U.S. comp growth in about six years. For a retailer whose bull case has rested on taking share across income cohorts, including higher-income shoppers trading down, a comp slowdown of that size directly challenges the growth narrative that had lifted the stock to a premium valuation.

The quality-of-earnings problem

Just as important as the comp miss was how Walmart got to its profit beat. According to the earnings coverage, the company benefited from approximately $2.9 billion in tariff refunds during the period, a windfall that management indicated added roughly 7.5 percentage points to operating-income growth. Strip that one-time benefit out, and the underlying operating performance looks materially softer than the headline profit suggests. Investors tend to penalize "low-quality" beats, earnings flattered by non-recurring items rather than by core operations, and Walmart's did exactly that.

Management also signaled it would reinvest the tariff proceeds into lower prices rather than let them flow to margins, a strategically defensible choice that nonetheless caps near-term profitability. That message was reinforced by guidance. While Walmart raised its full-year outlook, lifting expected net-sales growth to roughly 4%--5% from 3.5%--4.5% and nudging up its full-year adjusted-EPS range, it guided third-quarter EPS to about $0.62--$0.64, below the roughly $0.68 the Street had expected. A soft near-term profit guide, layered on a comp miss and a tariff-inflated beat, gave investors three reasons to sell in one report.

Valuation left no Margin for error

The final ingredient is price. Coming into the print, Walmart traded at a forward price-to-earnings multiple in the mid-30s, an expansion that reflected years of consistent share gains, e-commerce momentum and its status as a defensive compounder. At that valuation, the stock was priced for continued flawless execution. A comp deceleration to a six-year low and softer near-term earnings guidance were more than enough to puncture that premium, which is why an 8%--9% drop followed a quarter that, in a cheaper stock, might have been shrugged off. Several analysts framed the pullback as a "buy the dip" opportunity, arguing the long-term thesis remains intact, but that is an interpretation, not a settled fact, and the market's immediate verdict was clearly negative.

Why investors are concerned

The concerns are less about Walmart's competitive position, which remains formidable, and more about growth rate, earnings quality and valuation risk. A slowing U.S. comp raises the question of whether the consumer, particularly at the lower end of the income spectrum, is finally pulling back after a long stretch of resilient spending. The reliance on a tariff refund to power the profit beat invites scrutiny of what underlying margins look like without it. And the decision to reinvest windfalls into price, while good for customers and long-term share, means the near-term earnings trajectory is being deliberately restrained. For a stock trading at a premium multiple, each of those factors compresses the room for error.

At the same time, the reasons the stock commanded that multiple have not disappeared: e-commerce is growing more than 20%, the company raised its full-year revenue and profit outlook, and its scale advantages in sourcing, logistics and advertising continue to widen. The sell-off, on this reading, is a valuation reset rather than a thesis break.

What to watch next

The central metric to monitor is U.S. comparable-sales growth: whether the 2.6% pace was a one-quarter wobble tied to timing and consumer caution, or the start of a durable slowdown. Investors will also watch how quickly the price-reinvestment strategy translates into unit and traffic gains, the trajectory of e-commerce profitability as that Business scales, and the ongoing impact of tariffs, both the refunds and any future cost pressure, on margins. The third-quarter report will test the guidance that spooked the market, and any commentary on the health of the U.S. consumer heading into the holiday season will carry weight well beyond Walmart itself, given the company's role as a bellwether for American retail.

The confirmed catalyst here is unambiguous: a fiscal second-quarter report in which decelerating comparable sales, a tariff-refund-flattered profit beat and softer near-term EPS guidance combined to overwhelm a raised full-year outlook, sending a premium-valued mega-cap into a rare double-digit decline.