1. Deduction fee: Investors need to pay a certain subscription fee when purchasing funds.

2. Wrong buying time: When investors buy funds, the wrong buying time will also cause investors to lose money as soon as they buy them.

3. Blindly chasing hot spots: Investors should not blindly follow the market hot spots when buying funds.

4. Chasing up and killing down: buy when the fund rises and sell when the fund falls, so that investors can easily buy at the high level of the fund and lose money.