The Role of Trustees and Custodians - Every mutual fund has trustees and a custodian who safeguard investor interests. Trustees ensure that the AMC adheres to regulations, while custodians physically hold the securities, such as stocks and bonds. If the fund house closes, trustees step in to protect unit holders. The custodian continues to hold the underlying assets securely until a transfer, merger, or liquidation process is completed in accordance with regulatory norms.