Science and technology theme funds mainly invest in science and technology stocks, and can be purchased directly on the fund sales platform like other funds. However, it should be noted that when purchasing science and technology theme funds, you can't buy them blindly, and you can refer to some indicators.

1, standard deviation: the smaller the standard deviation, the smaller the fluctuation risk;

2. Beta coefficient: Beta coefficient is less than 1, so the risk is small;

3. Sharp ratio: the higher the better, the higher the index, which means that the higher the return of the fund after considering risk factors;

4. Investment experience of fund managers: The investment experience of general fund managers can be used for reference.