Goldman Sachs (GS.US) has appealed to the Federal Reserve against the latest stress test results, which could require the bank to increase its capital reserves. The Fed's annual "stress test" last month showed that the largest U.S. banks have enough capital to withstand severe economic and market turmoil. However, the banks' hypothetical losses this year could be higher because of the higher risk in their investment portfolios.

In the banks that participated in the stress test, the overall loss rate on existing loans was 17.6%, with Goldman's loss rate particularly high at 25.4%. Moreover, Goldman's increase in its stress capital buffer (SCB) was the largest among the banks, up 94 basis points.

The SCB is an additional capital buffer that the Fed requires banks to hold to withstand a hypothetical economic recession. Banks' performance in the stress test will directly affect the size of their SCB.

The Fed and Goldman Sachs did not comment on the report. Goldman said it would engage with regulators to better understand the reasons for its SCB growth.

David Solomon, Goldman's chief executive, noted in a statement last month that the SCB growth did not appear to reflect the company's strategic evolution of its business or the ongoing progress it has made in reducing the intensity of stress losses.