Money funds are not demand deposits, but also funds, and there is also the possibility of losses. It is just safer than stock funds, bond funds and hybrid funds. However, it is absolutely impossible for a demand deposit to lose its principal.

Of course, money funds also have "fixed-term" funds, but that's not the name. The scientific name is "closed-end fund" It is fixed on a regular basis. However, the state has just introduced some policies to cancel the types of fixed-term funds for less than three months. Therefore, if you buy a fixed-term money fund in the future, you can only buy some medium-and long-term ones.

I wonder if I can answer your question. If you have anything to ask, you can keep asking.