As Costco reaches a point of maturity in its US and Canadian markets, the firm’s cost leverage may show signs of deterioration.

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2-Year U.S. Treasury Note Continuous Contract $102.816 0.004 0.00% 5-Year U.S. Treasury Note Continuous Contract $106.328-0.070-0.07% 10-Year U.S. Treasury Note Continuous Contract $108.766-0.203 ...