financial operations in the largest sense, exclusively for the group members, in particular the coordination and centralization of the financing needs (especially long term) of the group members through the use of own funds or loans, the coordination and centralization of the financial management and the treasury for the members of the group (including cash pooling and the investment of available funds), factoring, the coverage of currency exchange risks, the granting of securities in rem and personal guarantees in order to guarantee the financial obligations entered into by the group members