A mutual fund trust is a type of investment vehicle that pools money from multiple investors and invests it in a variety of securities, such as stocks, bonds, and money market instruments. The trust is managed by a professional investment manager who makes decisions about which securities to buy and sell. The trust is structured as a trust, meaning that the investors are the beneficiaries of the trust and the trust holds the assets on their behalf. The trust is regulated by the Securities and Exchange Commission (SEC).