§ 11. #The use of credit.# Most noteworthy of these objective conditions is the general use of credit. The credit system greatly enhances the rhythm of price. If the value of a thing that is fully paid for falls, the owner alone loses; but if the value of a thing only partly paid for falls so much that the owner is forced to default in his payment, the loss may be transmitted along the line of credit to every one in a long series of transactions. A credit system, highly developed, is a house of cards at a time of financial stress. Demand liabilities are at such a time the greatest danger, so that the banks, ordinarily the pillars of financial strength, become at such a time the points of greatest weakness in the financial situation. If many of the customers were not restrained by their sense of personal obligation to the banks, by the strong pressure which the banks can bring to bear upon them, or by the force of public opinion among business men, from withdrawing the balances to their credit in a time of crisis, all commercial banks would become insolvent at once in a crisis by the very nature of their business; for all their ordinary deposits are nominally payable on demand. § 12. #Interest rates in a crisis.# In normal times there is always outstanding a great mass of short-time, commercial loans.[11] The motive of the borrower, in most cases has been to hire more labor and to buy more materials for use in his business. Ordinarily these loans can and are renewed without difficulty or are replaced by others, based on the security of new business transactions in unbroken succession. Now at the time of a crisis a general contraction of credit occurs, and all borrowers with maturing obligations are faced with bankruptcy. The effort of the business man at such a time is not to make a positive profit, but to save what he can from the threatened wreck. The demand for short-time loans, therefore, in such times of stress, fluctuates rapidly, and exceedingly high interest rates prevail in these loan markets for a few days or a few weeks, rates which have only a remote relationship with the usual capitalization of most agents.