When all persons having either debits or credits to be paid in New York and in London, respectively, are dealing with the banks in these cities, and the banks and special exchange brokers are constantly buying and selling these bills, a market is created for London exchange in New York (and conversely in London), and a much easier and more nearly complete cancelation of indebtedness results. In effect, all the debits and credits between the two countries are merged into one big ledger balance, and the international shipment of gold bullion finally made is just the amount needed to balance the accounts payable at the time. Industrial indebtedness is represented in various forms: bills of lading for goods shipped, drafts made by the creditor on his debtor for goods shipped or property sold, checks or letters of credit for travelers, bonds and notes public and private. These are the objects dealt in by the bankers who are the agents to carry on the work of exchange.
The balance of foreign exchanges is of essentially the same nature as the domestic cancelation of indebtedness. It is going on constantly between the two merchants in the same town, between two banks in the same town who represent groups of merchants, between men in neighboring towns, and between distant states like New York and California.[8] The price of exchange to the individual is reduced by the specializing of the business in the hands of a few dealers, permitting the cancelation of indebtedness or offsetting of exchange, and greatly reducing the amount of bullion to be transported in making the payments. The cost to the bank of providing this exchange for its customers varies as conditions change, but in any case is not great, so that in domestic business when any charge is made it is usually at a fixed rate, and is mainly for the service.
§ 9. #Par of exchange.# Foreign exchange from America to Europe is, however, in two features different from domestic exchange: (a) the cost of shipment of gold is greater; (b) the monetary units of the two countries usually differ in name, weight, and fineness, and sometimes in materials. We may define foreign exchange as the purchase and sale of the right to receive a given kind and weight of metal or its monetary equivalent in current funds at a specified time and place. Par of exchange between two countries using the same metal as a standard is the number of units of the standard coin of the one country that contains the same amount of fine metal as the standard coin of the other country. There is no fixed par of exchange between gold-using and silver-using countries: par of exchange between them fluctuates with changes in the comparative values of the two metals. The gold shipping points for importing or exporting gold are respectively par of exchange plus or minus the cost of moving the actual metal. These points vary with means of transportation and communication. The par of exchange between New York and London being nearly $4.866 and the cost of expressing and insuring a gold pound between New York and London being approximately $.02,[9] the shipping point for the export of gold from New York is $4.886 and for the import of gold to New York is $4.846. At these upper and lower limits, there is a motive for shipping gold as a commodity.
When large sales have been made to Europe and credits are accumulating in New York and the importation of gold is imminent or already begun, the claims are bought by bankers in New York at less than par. At such a time one needing to remit a sum to London can buy exchange for less than par, for every such draft remitted reduces London's indebtedness and, by so much, the need of shipping gold to this country. As a rule then, accumulating credits here mean a low rate of exchange, accumulating debits a high rate of exchange from this to the foreign country.
These are the merest rudiments of the subject. The many problems arising, such as the adjustment of foreign credits to changing needs, and such as arbitrage (the readjustment of the rates of exchange prevailing among different financial centers) make foreign exchange both a complex science and a difficult art.
§ 10. #International monetary balance and price-levels.# The balance of all accounts for or against a country (including new loans, current interest, and repayments) must thus eventually be settled in money. This cannot fail to affect the general level of prices in both countries, tho this is brought about often only in indirect and gradual ways. The flow of money out of a country causes the loan market of a country to tighten (interest and discount rates to rise) in proportion as the reserves of the banks are reduced. Then "general prices" begin to fall.[10] When prices fall, imports decline, as the country is not so good a place in which to sell: when prices rise, imports increase, as it is a better place in which to sell. The opposite effect is produced on exports, and thus in a short time the national credits and debits are again brought into equilibrium. A slight movement of money in either direction is enough to influence prices and set in motion forces to counteract a further flow of money. Decade after decade the circulating medium of leading countries changes very slightly in amount, and the fluctuations in its amounts during periods of so-called "favorable balance of trade" and of "unfavorable balance of trade" are only the smallest fraction of the value of goods passing through the ports of the country.
It is therefore absurd to imagine, as is sometimes done, that a country could, by continually importing goods, be drained of all its money, or that by any possible set of devices it could forever have an excess of exports to be paid for by a continual inflow of gold. Long before either of such movements could go far, the automatic readjustment of prices would inevitably check it, and secure and retain for each country its due portion of the money.
[Footnote 1: See Vol. I, ch. 17, sec. 10.]
[Footnote 2: See Vol. I, ch. 5, secs. 1 and 7.]
[Footnote 3: See Vol. I, ch. 6, sec. 11, on the origin of markets.]