Revenue at stores open at least a year -- an industry measure of a retailer's health-- rose 3.8 percent in July, the slowest pace since March, according to a preliminary tally of 10 retailers by the International Council of Shopping Centers. The figure was below a 5.5 percent increase in June.
Costco Wholesale Corp. was among the retailers posting disappointing figures.
Only a sliver of retail chains now report monthly sales figures. But Thursday's figures add to other evidence that shoppers are being cautious about their back-to-school purchases.
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