Walmart shares slid as much as 10% on Thursday, 20 August 2026, to a nine-month low, after the retailer reported its slowest US comparable-sales growth in more than six years.
The fall was the group’s worst single-day performance since May 2022 and wiped close to $90 billion off its market value in one session, as reported by the Financial Times.
Second-quarter US comparable sales rose 2.6%, against the 3.7% analysts had expected.
Why did Walmart shares slide?
The comparable-sales figure was the smallest advance the retailer had recorded since 2020, and it landed well short of what the market had priced in.
Investors reacted to the miss and to guidance that pointed to a weaker quarter ahead rather than a recovery.
Walmart guided third-quarter adjusted earnings per share to a range of $0.62 to $0.64, below the $0.68 analysts had forecast. The sales miss and the softer profit outlook arrived together, and the market moved on both at once.
Comparable sales measure takings at stores that have been open at least a year, stripping out the lift that comes from new openings. That makes the figure the cleanest available read on whether existing shoppers are spending more, and a 2.6% rise signalled that they were not.
What Walmart said about shoppers and pharmacy pricing
The company said shoppers remained under pressure from higher fuel prices, which squeeze discretionary spending before customers reach the checkout.
Lower pharmacy pricing also weighed on sales, reducing the value of each prescription transaction even where the number of transactions held up.
Part of the shortfall was attributed to new federal rules on drug pricing that cut the cost of several expensive medications for people enrolled in Medicare.
Lower prices at the pharmacy counter reduce reported revenue on those items, even though the volume of medicine dispensed does not change.
What the Walmart shares slide signals for American retail
Walmart is the largest retailer in the world by revenue and serves a customer base weighted towards lower and middle-income households, which is why its quarterly numbers are treated as a proxy for the health of American consumer spending rather than a company-specific result.
The scale of the market reaction suggested investors read the slowdown as a signal about household demand across the United States rather than a problem confined to one retailer.
Falls of that scale in a single session are rare for a company of Walmart’s size and reach.
Third-quarter results will test whether the second quarter was an outlier or the start of a trend, with the guidance range of $0.62 to $0.64 a share now the benchmark the company has set for itself.
Until those numbers land, investors have only the softer outlook the company has just issued to work from.
