Goldman Sachs Group Inc Chief Executive Lloyd Blankfein told American television recently that he retains the support of the board as well as support from clients since the SEC accused the powerful but embattled bank of fraud earlier in April.

Blankfein, after testifying for more than three hours before the Senate’s permanent investigations subcommittee, maintained his stance that Goldman did nothing wrong when it sold an exotic mortgage derivative – the Abacus CDO – that cost its buyers $1bn when housing prices slumped.

“Synthetic CDOs allowed buyers and sellers to be able to take the kind of positions they wanted in the housing market. It wasn’t a casino,” he said in the interview. “These were highly sophisticated parties, some of the most sophisticated in the world.”

Blankfein defended the idea of synthetic CDOs – or derivatives built on credit derivatives – saying they let investors diversify or hedge their exposure to housing markets efficiently and quickly.

“These were professional investors who sought the risk and attained the risk they wanted in the market,” he said.

With regard to trading customers, Goldman fulfilled its duties as a middle man.

“When you are a market maker you have responsibility to make sure your client is suitable, is knowledgeable and that what you’re providing serve the purpose and provides the risk that the client wants.”

He was more contrite when it came to the broader economy, where businesses and individuals have suffered from the housing slump and the ensuing recession. Wall Street banks, including Goldman, have been blamed for exacerbating the crisis by creating exotic mortgage securities, enabling some poor underwriting and then shorting the housing market.

Blankfein said Goldman does bear some responsibility for the financial crisis of 2007 and 2008.

“I think that financial institutions let the public down and we are a very important, influential financial institution, and so we bear our share.”