What is social security fund? Can individuals buy it?

"Social Security Fund" is a simplified generic term with five concepts.

One is the "social insurance fund";

The second is the "social pooling fund";

Third, the personal account fund in the basic old-age insurance system is called "personal account fund";

Fourth, the supplementary guarantee funds of enterprises include the supplementary endowment insurance fund of enterprises (also called "enterprise annuity") and supplementary medical insurance of enterprises;

Fifth, the national social security fund.

The National Social Security Fund refers to the social security fund managed by the National Social Security Fund Council and centrally managed by the central finance, which consists of funds allocated by the reduction of state-owned shares and equity assets, funds allocated by the central finance, funds raised by other means approved by the State Council, and investment income. 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 security fund assets are assets independent of the board of directors, social security fund investment managers and social security fund custodians. This is the so-called "social security fund" that can enter the stock market.

It seems that individuals can't buy it. Generally, a company guarantees employees.