(d) Acting as trustee and business manager for passive investors, and especially as executor and administrator of estates or as guardian of a minor heir. This function has been taken up rapidly since about 1890 by the trust company[3] organized under state laws.
§ 3. #The essential banking function.# The one essential function of a bank, however, is selling (lending) its credit to its customers in some form which will conveniently serve the same function as money. A bank is sometimes defined as a business whose income is derived from lending its promises. The bank's credit is sold in the form of its promises, the evidences of which are its receipts, depositors' account books, drafts and checks on other banks, and bank notes. The indispensable condition to the exercise of this function by a bank is public confidence in its ability to fulfil its promise to pay whenever it is due. This confidence is built upon the bank's paid-up capital; its surplus and undivided profits: the further liability of the stockholders to make good any losses up to an amount equal to the capital stock each holds ("stockholder's double liability"); the financial prestige of the bank's officers, directors, and stockholders; the bank's established reputation and "good will" in the community after a period of successful operation; the character of its loans and of the securities which it owns; and, finally, by the reliance placed in the control and inspection by official examiners. The bank may then sell its credit in any one or in all of the following five ways: (1) by receiving time deposits; (2) by receiving demand deposits; (3) by the method of discount and deposit; (4) by selling exchange of funds to distant points; (5) by issuing bank notes.
§ 4. #Time deposits.# Time deposits are funds to the credit of customers which, by agreement, are to be left for some specified minimum time or on condition that the bank may require notice in advance of the depositor's intention to withdraw them. The notice that may be required is usually thirty to ninety days; but only in times of general financial crises or of runs on particular banks is this requirement enforced. A sufficient deterrent to irregular withdrawal of funds is usually found in the loss of interest if deposits are withdrawn at other than stated times. The bank's right to require notice makes prudent the investment of a much larger proportion of its deposits and for a longer time; it reduces the proportion of deposits needed for reserves, and yet reduces the danger of a "run" upon the bank in time of financial distress. These are reasons why banks can and usually do pay interest on time deposits (at from 2 to 4 per cent), as until more recently they rarely did on demand deposits[4]. From the standpoint of the depositor a time deposit is, by its very nature, an investment and not a demand credit available for current monetary uses. Only that portion of a person's capital that for some more or less considerable period is not likely to be needed for other purposes ought to be put into time deposits. A bank, however, is generally a much safer place in which to keep a fund of purchasing power for the future than is the strongest private treasure box. Receiving time deposits is the one essential function of savings banks, but this function is increasingly performed by other banks[5]. Sometimes time deposits are cared for by a separate department and kept separate from the general business of a commercial bank.
§ 5. #Demand deposits#. Demand deposits are those payable on demand, the demand in practice being by means of personal checks requesting the bank to pay to (or on the order of) a specified person, or to pay to bearer. A customer's bank account consisting of demand deposits is called a checking account. Since the turn of the century it has become increasingly the practice to pay a low rate of interest (about 2 per cent) on current balances, oftener to large depositors. Banks attract demand deposits mainly by the convenience and economy which they offer to their customers in the guarding of funds from theft and fire and in saving the time, trouble, and expense of carrying money for making payments. A deposit in a bank is to the depositor for most purposes "just as good" as money in the pocket and for many purposes is even better. Thus the banks have become the custodians of a large proportion of the money (or funds) needed for current use by individuals and business corporations.
§ 6. #Discount and deposit#. The process of discount and deposit is the purchase of the promissory note of a customer,[6] the price being a credit in the form of a demand deposit on the books of the bank. This—the central and most characteristic banking operation—has something of mystery in it at first view. The simplest idea of making a deposit is that of bringing to a bank window bags and rolls of money or other funds (credit papers such as checks and drafts, calling for the payment of money). The bank in that case becomes the debtor and the depositor becomes the creditor of the bank. But in discount and deposit the depositor brings no money, and the credit paper that he gives is his own promise to pay whereby he becomes the bank's debtor. For example, when a bank discounts a thousand dollar note for three months and credits its customer with the proceeds, its deposits are at that moment increased (let us say) $985. Notice that hereby the bank does not add a cent to the cash in its vaults while it has added to its liabilities payable on demand. As an off-setting asset it holds the note of its customer receivable at some future time.
§7. #Nature of banking reserves#. Banks would have nothing to gain by receiving deposits or by issuing notes if they were obliged to keep in the vaults actual money to the amount of their deposits and outstanding notes (unless they were paid by depositors for taking care of deposits). Banks have found it necessary in practice to keep on hand money amounting to only a fraction of all their outstanding obligations in order to be able to pay promptly all due demands, excepting in periods of general financial distress. The sum thus kept on hand is called the reserve or the reserves of the bank, and this is frequently expressed as a percentage of reserves against deposits or against note issues, respectively. Frequently, as in the United States, a minimum percentage of reserves is fixed by law.[7]
A bank's reserves consist, first, of the lawful money which it actually holds in its vaults at any moment and secondly, of certain other credit items in other banks or with the government, of such a nature that a bank is permitted to count them as tho immediately available.
The explanation of the adequacy of a mere fractional reserve is found in the nature of the individual monetary demand[8] and in the effective way in which a checking account serves as a substitute for actual money.[9] Every customer, if he would avoid overdrawing his account, must at most times keep a goodly balance to his credit that he does not immediately need. Many individuals and corporations must at times keep very large balances. The times of maximum monetary need of the customers of a bank never exactly coincide and many payments are made among the customers of a single bank, requiring only bookkeeping transfers. A fractional reserve is therefore ordinarily fully adequate, altho with any less than a 100 per cent reserve any bank would be insolvent if all of its demand obligations were presented at the same instant. Such a contingency is made impossible by business custom and public opinion especially among the larger customers of banks, but the panic of small depositors often brings about dangerous conditions.
§ 8. #Bills of exchange, domestic.# Foreign and domestic exchange is the sale of orders for the payment of specified sums of money at distant points. But for this, payments at distant points would ordinarily have to be made by sending the money in some way. It must often occur, for example, that hundreds of payments, aggregating millions of dollars, must be made by persons in and near Chicago to those in and near New York, while, at the same time, equally large sums are due from New York to Chicago. The wasteful process of shipping these sums back and forth is avoided by the cancellation of indebtedness between the two localities. It has been the practice for each small bank to keep a part of its legal reserves in correspondent banks in one or more of the larger cities on which it draws bills of exchange for its customers and to which in turn it remits for collection drafts and checks which it has received. From time to time, as balances of accounts increase on the one side or the other, shipments of actual money become necessary, but these are only a small fraction of the total amount of the bills of exchange. Similarly, the settlement of accounts between any two localities can be made by the shipment of comparatively small sums of money. Under the Federal Reserve Act the reserve banks are in various ways assuming the functions of the correspondent banks.
The wider use and acceptance of individual checks at long distances from the banks upon which they are drawn limit by so much the proportion of special bills of exchange drawn by the banks themselves. Domestic exchange involves just the same principles as foreign exchange of funds, except that in the latter, usually, two different units of standard money are used. In connection with the discussion of foreign trade below, foreign exchanges will be explained and further light will be thrown upon the adjustment of the money supplies and levels of prices of the various sections of a single country as well as between different countries.