(Stock prices added.)

NEW YORK (

TheStreet

) -- Credit-card defaults are still an issue for lenders, even as some have seen those losses slow down in July.

American Express

(AXP) - Get Report

said on Monday that the rate of charge-offs, or the percentage of loans the company believes won't be repaid, fell to 9.2% in July from 9.9% in June.

The rate of delinquencies slipped to 4.2% last month from 4.4% in June.

Despite the slight improvement, the company's rate of losses on credit-card loans is still significantly higher than the 5.3% rate it experienced in the second quarter of last year.

Bank of America

(BAC) - Get Report

also saw its charge-off rate fall to 13.81% from 13.86% in June, while its delinquencies improved to 7.58% from 7.73% in the month prior.

But

Capital One Financial

(COF) - Get Report

didn't see the same turnaround, with both its charge-off rate and delinquencies rising.

The company said its charge-off rate grew to 9.83% from 9.73% in June, while its delinquency rate rose to 4.83% from 4.77%. The increase follows four months of improvement.

Credit-card losses have become the norm among lenders as consumers struggle to pay their debt amid rising unemployment and decline in personal wealth.

Shares of Bank of America closed down 5% to $16.56, American Express declined 4% to $30.39 and Capital One slipped 3% to end the day at $34.06.

-- Reported by Jeanine Poggi in New York.

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