For the second time this week, hedge fund manager John Paulson has held a conference calls with investors over his involvement in the Goldman Sachs case, according to CNBC.

According to sources Paulson repeated his contentionâ??laid out in a letter to clients Tuesdayâ??that his dealings in the mortgage market were "transparent and open."

Even though he has not been implicated, Paulson has been taking a proactive approach with his investors. He had held a conference call on Monday with a different group of clients.

In today's call, sources say, Paulson was asked if he had done other deals similar to the Goldman Sachs deal in question.

Paulson replied he had made similar types of bets in the mortgage market; but a source familiar with Paulson's investments says the Goldman deal was the only collateralized debt obligation on which Paulson "bought protection," a particular way to bet against the underlying securities.

One investor today asked Paulson if he had received a Wells notice from the SECâ??a formal notice that his firm is about to be sued. He gave the same response he gave investors on Monday's conference call: "No."