Regulators and bankers are worried that a little- publicized plan from the Financial Accounting Standards Board could drastically change the income statements of financial institutions, making even healthy performers look anemic to investors.

The FASB proposal is "a sleeper," said Timothy Stier, assistant chief accountant at the Office of Thrift Supervision. Industry officials have focused on the board's derivatives proposals, he said, but have paid little attention to this issue, which could have a broader impact.

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