THE CAPITALIZATION THEORY AND THE VALUE OF MONEY Money is capital. A dollar is a capital-good. Money is, moreover, a durable form of capital, which gives forth its services bit by bit, and indeed, in a community where the state bears the burden of wear and tear, never ceases to give forth those services. In any case, from the standpoint of a given individual, so long as there is a limit of tolerance prescribed for legal tender, it is a matter of accident if he ever incurs a loss from the wastage of the capital instrument, money, through wear and tear. Moreover, the fact that money is "fungible," and that its use is to be found in a process which commonly returns to the owner, not the same coin, but a different coin, we may, in general, abstract from the wear and tear of the dollar, and look upon the dollar as a capital instrument which promises its owner, if he chooses to use it as capital, a perpetual annuity. The nature of this money service will be more fully described later. For the present it is sufficient to say that exchange is a productive process, that exchange creates values, in as true a sense as manufacturing does, and that money facilitates exchange in as true a sense as coal facilitates manufacturing. There is, at any given time, a demand-curve for this money service, manifesting itself in the money market, a demand for the short time use of money as a tool of exchange, and the "prices" which come out of the interaction of demand and supply in the money market are the short time "money rates" including the "call rates." These are properly to be conceived, not as pure interest on abstract capital, but as rents[58] which are to be attributed to money as a concrete tool.