Target's second-quarter earnings fell 13% from a year ago as cautious shoppers and a big expansion in Canada hurt the retailer's performance.

Target said Wednesday it earned $611 million, down from $704 million a year earlier. Earnings per share were 95 cents compared with $1.06 in 2012's second period.

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Target stock was down about 3% in afternoon trading.

Target opened 44 stores in Canada during the quarter, bringing its total to 68, but depressing per-share earnings by 21 cents, it said. Analysts expected earnings per share of 96 cents.

Revenue increased 2%, to $17.1 billion from $16.5 billion. The Canadian stores brought in $275 million in sales. Target aims to operate 124 stores in Canada by year's end.

Same-store sales increased 1.2%. Target reported U.S. segment sales increased 2.4% to $16.8 billion.

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