Mutual funds are NOT guaranteed or insured by any bank or government agency. Even if you buy through a bank and the fund carries the bank's name, there is no guarantee. You can lose money.
Some types carry more risk than others.
Past performance is not a reliable indicator of future performance. Beware of dazzling performance claims. ALL mutual funds have costs that lower your investment returns. You can buy some mutual funds by contacting them directly. Others are sold mainly through brokers, banks, financial planners, or insurance agents.