218 INTERNATIONAL TRADE which an outflow can be easily met and into which an inflow can be readily absorbed. In connection with a discount policy aiming at the same result — the elimination or minimizing of a flow of gold — they have the appearance of dominating the situation. Sometimes, indeed, they are treated in the modern literature of our subject as if this were the factor that needed to be watched, wisely handled, adequately safeguarded ; as if it were the core and substance of the problem of international payments. Altogether too much stress is thus put on the importance of a “defensive” bank policy, on the efficiency of this device toward maintaining stability of credit and prices. It operates essentially as the foreign exchange market does in the absence of any deliberate regulatory policy ; and there is no clear evidence to show that under normal trade conditions it operates better. It is merely one of the several devices that enable international payments to offset one another with the minimum of friction. Still another equalizing factor is the movement of securities that have an international market. They are sold between the great financial centers in a way that replaces or lessens the transmission of gold. Just as lending and borrowing have come to play a much larger part in international trade than was reckoned with in the earlier discussions, so have the sales and purchases of securities. This is true not only of those securities which had their origin in international loans, but of others also which at the outset had no international character but in the course of time have come to be quoted in the financial markets of different countries. They are bought and sold, sent this way and that, on a fractional differ- ence in price. In the so-called arbitrage business — buying in one market with a view to reselling at once by cable in another — a great volume of transactions is carried on at an astonishingly small spread between buying and selling price, as is the case in the closely related purchases and sales of bills of exchange. In both sets of operations, the current rate on short-time loans is a com- manding factor. In any given financial center, a tight-money market and a high discount rate tend to lower the prices of the