A survey of more than 6,000 U.S. credit card customers found average interest rate increases for the second quarter were higher than analysts had expected.
The average annual credit card interest rate jumped 5.7 basis points to 1.78 percent from a year ago.
Credit card issuers reported higher card balances, however, and consumers were buying fewer cards than usual.
Data for the first quarter of 2017 showed a 0.6 percent increase in the average monthly balance over the previous year, according to Experian.
For the year, average monthly interest rates rose 4.1 basis points, the survey said.
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