A report on the issue is to be reviewed tomorrow
Sinn Féin leader Gerry Adams says Finance Minister Michael Noonan has questions to answer over the sale of NAMA's Northern Irish loans.
The Cabinet is due to examine the Comptroller & Auditor General report tomorrow.
It is understood to indicate that NAMA lost out on hundreds of millions of euro during the sales process.
It is believed NAMA will dispute these findings.
Earlier, Minister Noonan said there is no indication that NAMA acted illegally or inappropriately in the sale of its loans.
But he said the Public Accounts Committee (PAC) will have the first say in reviewing the findings of the long-awaited report.
Mr Noonan says a full Commission of Investigation will only be sought if the PAC has questions that cannot be answered.
While Mr Adams has welcomed the fact that an investigation could be on the horizon.