WASHINGTON — The government laid out its framework for evaluating the nation's 19 largest banks Friday, not providing the specific loss estimates being used in the "stress tests" but suggesting that regulators have aggressively sought detailed information from individual firms.

The report released by the Federal Reserve gives the first peek behind how government officials are determining whether the largest banks need additional capital. Banks have received an estimate from the government on how much capital they will need to raise, and executives and officials are expected to negotiate on a final figure over the next week. The government will then release the results of the "stress tests" May 4, including some company-specific information.

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