The value of credit card accounts at least 30 days late jumped 26 percent to $17.3 billion in October from a year earlier at 17 large credit card trusts examined by the AP. That represented more than 4 percent of the total outstanding principal balances owed to the trusts on credit cards that were issued by banks such as Bank of America and Capital One and for retailers like Home Depot and Wal-Mart.

At the same time, defaults — when lenders essentially give up hope of ever being repaid and write off the debt — rose 18 percent to almost $961 million in October, according to filings made by the trusts with the Securities and Exchange Commission.

... Experts say these signs of the deterioration of finances of many households are partly a byproduct of the subprime mortgage crisis and could spell more trouble ahead for an already sputtering economy.