Walmart is cautious with expectations after slowest sales growth in 6 years

Walmart reported its slowest growth in U.S. comparable sales in six years during its most recent quarter, and it offered a reserved upgraded outlook. The results, announced Thursday, fanned some concerns about the health of its core low-income shoppers who are spending cautiously as they see prices go up at the gas pump and everywhere else. Shares were down more than 8% in early morning trading.…