Final answer:
Goldman Sachs was unethical in the Abacus deal due to lack of transparency, failure to conduct due diligence, manipulation of credit ratings, and collusion with other financial institutions.
Therefore, all the options are correct.
Step-by-step explanation:
In the Abacus deal, there were several factors that support the fact that Goldman Sachs acted unethically:
- Lack of transparency in disclosing the risks to investors: Goldman Sachs did not provide clear and accurate information about the risks associated with the Abacus deal, which misled investors.
- Failure to conduct proper due diligence on the mortgage-backed securities: Goldman Sachs failed to thoroughly assess the quality and potential risks of the mortgage-backed securities involved in the Abacus deal.
- Manipulation of the credit ratings for the securities: Goldman Sachs manipulated the credit ratings assigned to the securities, giving them higher ratings than they deserved, which deceived investors.
- Collusion with other financial institutions to deceive investors: Goldman Sachs colluded with other financial institutions to hide the true nature of the Abacus deal and deceive investors.
These actions demonstrate a lack of ethical behavior on the part of Goldman Sachs in the Abacus deal.