According to the provisions of Article 17 of the Marriage Law, the production and business income earned by husband and wife during the marriage relationship shall be owned by both husband and wife. This provision clearly defines the scope of determining the joint property of husband and wife. As a kind of income from production and operation, the value-added part of stocks should belong to the joint property of husband and wife as long as it is obtained during the marriage relationship. From the distribution principle of burden of proof, Article 7 of the Supreme People's Court's "Several Specific Opinions on Handling Divorce Cases by People's Courts" stipulates that if personal property or marital property is difficult to identify, the party claiming rights shall bear the burden of proof. If the parties fail to produce strong evidence and the people's court cannot verify it, it shall be treated as the joint property of the husband and wife.

The appreciation or depreciation of stocks and funds before marriage after marriage belongs to the joint property or debt of husband and wife, but the principal does not belong to the joint property of husband and wife. Pre-marital deposits are made after marriage, and the interest belongs to the joint property of husband and wife.