Finance [1] refers to the issuance, circulation and withdrawal of money, the issuance and withdrawal of loans, the deposit and withdrawal, the exchange of foreign exchange and other economic activities.

Finance (FIN) is to realize the equivalent circulation of value and profit after re-integration of existing resources. The professional view is that the process from saving to investment can be narrowly understood as financial dynamic monetary economics. )[ 1]

Finance is the behavior that people make the optimal allocation decision of resources in uncertain environment.