The decline in Walmart shares reflects a growing concern regarding the resilience of the U.S. consumer in a shifting macroeconomic environment. Recent data suggests that while inflation has moderated, the cumulative effect of high prices over the past few years is finally weighing on discretionary spending. Walmart, as the nation’s largest retailer, serves as a primary barometer for household health, and the current intraday volatility indicates institutional concern that even the value-oriented segment is beginning to pull back.

The downward pressure is also being exacerbated by disappointing forward-looking statements from key competitors in the retail and consumer staples sectors. As peer companies signal inventory gluts in…