Stress test results of Federal Reserve are putting an important profit source of Goldman Sachs at risk as the bank performed poorly compared to other big banks. The outcome of the stress test has raised concerns among analysts and investors as they worry that the bank might be barred from buying back its own stock or increasing dividend, by the regulators.

Goldman used dividends and share buybacks to appeal investors at a time when other elements of the bank's business faced challenges. Now, the results of the stress tests worry analysts whether the Fed would allow Goldman Sachs to continue its buyback programs.

The stress tests conducted by the Fed annually make a judgment on a bank's ability to deal with the risks it might face. The tests ensure if banks have an adequate cushion to withstand losses if another financial crisis hits.

The Fed will announce whether it has accepted or rejected each bank's plans for returning capital to shareholders over the next couple of years on Wednesday.

According to calculations of Mike Mayo, a bank analyst with CLSA, Asia's leading equity brokers and investment group, the stress tests could leave Goldman with only $700 million to spend on higher dividends and stock buybacks this year, in comparison with the $5.5 billion it spent on buybacks alone last year.