Professionalism in Advising a Friend

Maria is a CFA charterholder who has been working in investment management for several years. She is approached by a close friend who seeks advice on investing in a startup company. The friend asks Maria to provide an investment opinion, mentioning that he trusts her expertise and would greatly appreciate her guidance. However, Maria knows that the startup is not a good investment and feels it might harm her friend’s financial situation.

What should Maria do?