What fund are you talking about? If it is a money fund, some platforms can invest as long as 1 minute, such as Yu 'ebao. If it is a hybrid fund, it is generally from 10 yuan. Depending on what type you buy, it seems useless to invest a penny in the money fund. It can only be said that it is a zero threshold, with low risk and low return for money funds and high risk and high return for stock funds. According to your risk preference, you should be careful when investing in risks.