Answer: To the extent that Inside Information is not disclosed.
Explanation:
U.S. law prohibits people from being able to disclose inside information so if you pass on the information about the impending bankruptcy to a family member, you would be in violation of this law and if found out, will be punished accordingly.
If however, you advice your family member not to invest based on analysis of the company (of which you must keep detailed records of) using mosaic information which is public information, then you would not have used inside information so it would not be illegal.