The fund pool business is the business of investing in non-standard assets, which leads to one-to-one correspondence between the source of funds and the use of funds, and the source of funds does not match the use period of funds; The cash pool business adopts the operation mode of "rolling sale, collective operation, maturity mismatch and separate pricing". Products that invest in the private market and have the characteristics of rolling sale, mixed operation, maturity mismatch, separate pricing, no separate account establishment or independent accounting belong to the cash pool business. The fund pool business has the operational characteristics of short-term offering and long-term investment, maturity mismatch, separate pricing, rolling issuance and collective operation. The three essential characteristics of the fund pool business are as follows: Although the fund pool business will directly lead to the mismatch between the source and purpose of funds, rigid redemption and other results, it is not just the fund pool business that can cause this result.

Fund pool, also known as cash pool, was originally a fund management model jointly developed by financial companies of multinational corporations and international banks, which was used to uniformly distribute the global funds of the Group and minimize the net positions held by the Group. The fund pool business mainly includes account balance transfer of member companies, daytime overdraft of member companies, active receipt and payment, entrusted lending between member companies, and interest bearing of member companies on deposits and loans of the group headquarters. Different banks have different expressions about cash pools. Gather funds together to form a storage space similar to a reservoir, which is usually used to raise funds for investment, real estate or insurance. Insurance companies have a huge pool of funds, which is balanced by the outflow of compensation funds and the funds of new policies. Banks also have a huge pool of funds, with loans and deposits coming in and out, which makes this pool of funds basically stable.

Many domestic commercial banks, such as China Merchants Bank, put forward cash pool management, which is to realize the centralized operation of funds in the form of no trade background, no interest need to be hedged, the account balance can still be separated and the account balance is concentrated. This is the maximum flexible use of entrusted loans. In the cooperation between the group and the bank, the bank is the lender, the group company and its subsidiaries are the entrusted lenders and borrowers, and then a package of entrusted loan agreements are realized through e-banking, so that the original business that needs to be handled separately becomes an intensive business and process, and the unified operation and centralized management of the group funds are realized.

The centralized fund management mode of some large enterprise groups in China includes two lines of revenue and expenditure, internal banks, fund settlement centers and financial companies, and most of them are settlement centers and financial companies. The fund settlement center is usually a specialized organization established within an enterprise group, which handles cash receipts and payments and current settlement business of all member units of the group. Usually set up in the finance department, it is a functional department that independently operates funds. The Finance Company is a non-bank financial institution approved by the People's Bank of China and established under the Group to provide supporting financial services for the development of group members.