Realize capital appreciation. The state stipulates that social security funds can enter the stock market. The basic principle of social security fund investment operation is to realize the appreciation of fund assets on the premise of ensuring the security and liquidity of fund assets. Social insurance fund refers to the special fund established by the state through legislation to pay social insurance benefits, aiming at providing reliable financial guarantee for social insurance. The assets purchased with these funds and their value-added parts also belong to the scope of social insurance funds.