Moreover, imports of gold have a very stimulating effect on speculative stock markets, because an increase in the amount of gold available means a roughly corresponding increase in the amount of credit that bankers can give, so that when gold is known to be coming speculators know that credit will be cheaper for carrying their commitments, and will come in and buy, with a light heart, stock that they could not possibly pay for, but hope to pawn with their bankers until they can sell it at a higher price. And so unless the loss on the exchange side of the business is too great, it often pays the leaders of a bull campaign to import gold, having first laid in a line of stock, and make their profit by unloading during the fit of exhilaration produced by the news that the gold is on the way. Or, again, quite apart from any speculative and spectacular motives behind gold shipments, it may pay bankers, in a country where rates for money are ruling high, to import gold at an apparent loss, because of the high rates that they get for the credit that they are thereby enabled to give. They thus, in effect, borrow gold, and recoup themselves by being able to lend, on profitable terms, larger amounts than they borrow, since they can always create credit to larger amounts than that of the gold in their vaults. Sometimes, in fact, in times of pressure banks find themselves obliged to import gold so as to strengthen their position, whatever the loss on exchange may be. For instance, last September, when the Berlin exchange was at the point at which, if theory ruled in these matters, Berlin ought to have been thinking of packing up some gold to send to London, Berlin was buying gold in London and shipping it to the Fatherland, because there is always great pressure for currency in Germany at the end of September when the interest on mortgages falls due and has to be paid in cash, with the result that the Reichsbank's note circulation expands very rapidly and the backing of gold behind it has to be increased. Sometimes, again, in order to attract gold, a central bank will give importers credit for gold that is on the way, so that they may be saved from loss of interest while the metal is afloat. Thus the actual importer may make a profit on the shipment, not as a genuine exchange transaction, but at the expense of the central bank. In these cases two of the many functions performed by gold have to be considered. As a means of international remittance, it may not be as cheap as a bill, but it may have to be sent, not as a means of remittance, but because it is urgently wanted in the importing country as a make-weight for the balloon of credit.