Walmart’s slowing U.S. sales growth hits shares as investors focus on same-store momentum

Walmart (WMT) shares fell about 9.9% in the morning session after the company’s reported U.S. same-store sales growth slowed to 2.6%, down from 4.8% in the prior year period, according to a market report published by Yahoo Finance on Aug. 20, 2026.

Same-store sales, sometimes called comps, measure how revenue performed in stores open at least a year. It strips out the impact of new locations and is closely watched because it indicates how customers are responding to Walmart’s mix, promotions, and pricing amid shifting consumer budgets.

The report characterized the 2.6% growth rate as the slowest since about 2020, suggesting a more challenging demand environment than investors had been positioned for. In the same account, the market reaction was tied not only to the level of growth but also to the change versus the year-ago comparison.

The Yahoo Finance item also said the company’s U.S. comps missed expectations, with the figure landing below a roughly 3.7% consensus target referenced in the report. When actual results come in below that kind of benchmark, investors often reprice the stock because it can imply weaker near-term sales momentum and potentially a more difficult path to sustaining margins.

Walmart’s market impact highlights a broader retail pattern seen in recent quarters: even large, diversified chains can experience steep share price moves when the “same-store” announcement deteriorates. For retailers, comps affect how Wall Street models future revenue growth, how it thinks about inventory and shrink, and how it frames the balance between discounting and keeping operating costs under control.

The reporting did not provide additional granular detail in the provided excerpt on what drove the deceleration, such as whether it reflected softer traffic, a particular product category, the timing or aggressiveness of promotions, or mix effects across grocery and general merchandise. It also did not specify whether Walmart offered a formal outlook update in the same release or conference commentary that accompanied the numbers described.

For investors and analysts tracking Walmart specifically, the immediate question is how durable the 2.6% U.S. comps reading is. A slowdown that is “the slowest since about 2020” can be interpreted as a normalization after a stronger period, but it can also announcement that shoppers are becoming more price sensitive or trading down, depending on the underlying drivers. The market reaction suggests investors leaned toward the latter interpretation when the results were digested.

Looking ahead, investors will likely focus on whether Walmart can re-accelerate comps in subsequent quarters, and whether management provides clearer guidance on demand trends and promotional strategy. Any indication of improvement in foot traffic, stabilization in discretionary discretionary categories, or evidence that pricing pressure is easing could matter for the stock’s next move. Until the company discloses the underlying drivers in more detail, the market’s interpretation of “slowest since about 2020” remains the key variable.