The U.S. government's long-awaited stress-test results have found that 10 of the 19 largest U.S. banks need a total of about $75 billion in new capital to withstand losses if the recession worsened.

The Federal Reserve's findings, released on May 7, show the financial system, like the overall economy, is healing but not yet healed.

Some of the largest banks are stable, the tests found. But others need billions more in capital - a signal by regulators that the industry is vulnerable but viable. Government officials have said a stronger banking system is needed for an economic rebound.

Officials hope the tests will restore investors' confidence that not all banks are weak, and that even those that are can be strengthened. They have said none of the banks will be allowed to fail.

The banks that need more capital will have until June 8 to develop a plan and have it approved by their regulators.