What you want to ask is that the amount of derivative deposits in commercial banks is generally proportional to what and inversely proportional to what? The answer is: it is directly proportional to the original deposit and inversely proportional to the statutory deposit reserve ratio. The number of derivative deposits in commercial banks is generally proportional to the original deposits, because the loan business of commercial banks is based on deposits. The more deposits banks absorb, the more loans they can issue, which in turn drives the increase of derivative deposits. Derivative deposit refers to the deposit generated by commercial banks through business activities such as loans, and its quantity is jointly determined by original deposit and loan. The number of derivative deposits is inversely proportional to the statutory deposit reserve ratio, because the statutory deposit reserve ratio is part of the deposits of commercial banks, and banks need to pay the deposit reserve to the central bank in a certain proportion to ensure the safety and stability of bank funds.