Which of the following is NOT one of the four unities required to create a joint tenancy?

To establish a joint tenancy, four key unities must be present: unity of time, unity of title, unity of possession, and unity of interest. Each unity serves a specific purpose to ensure that the co-owners have an equal and simultaneous stake in the property.

The unity of time requires that all tenants acquire their interest in the property at the same time. The unity of title stipulates that the interests of all tenants must arise from the same legal document. Unity of possession means that all tenants have equal rights to possess and use the entire property, rather than splitting usage by specific portions.

The option regarding unity of financial investment is not recognized as one of the necessary unities for creating a joint tenancy. Joint tenancy focuses on the shared ownership and equal rights among co-owners, irrespective of their individual financial contributions toward purchasing or maintaining the property. Therefore, the absence of a requirement for financial contributions or investments confirms that option regarding financial investment does not align with the traditional unities required for forming a joint tenancy. This highlights why it is not among the four essential unities.