The ability to draw finance-bills of this kind often puts a house disposed to take chances with the movement of the exchange market into line for very considerable profit possibilities. Suppose, for instance, that the manager of a house here figures that there is going to be a sharp break in foreign exchange. He, therefore, sells a line of ninety-day bills, putting himself technically short of the exchange market and banking on the chance of being able to buy in his "cover" cheaply when it comes time for him to cover. In the meantime he has the use of the money he derived from the sale of the "nineties" to do with as he pleases, and if he has figured the market aright, it may not cost him any more per pound to buy his "cover" than he realized from the sale of the long bills. In which case he would have had the use of the money for the whole three months practically free of interest. It is plain speculating in exchange--there is no getting away from it, and yet this practice of selling finance-bills gives such an opportunity to the exchange manager shrewd enough to read the situation aright to make money, that many of the big houses go in for it to a large extent. During the summer, for instance, if the outlook is for big crops, the situation is apt to commend itself to this kind of operation. Money in the summer months is apt to be low and exchange high, affording a good basis on which to sell exchange. Then, if the expected crops materialize, large amounts of exchange drawn against exports will come into the market, forcing down rates and giving the operator who has previously sold his long bills an excellent chance to cover them profitably as they come due. VI. ARBITRAGING IN EXCHANGE. Arbitraging in exchange--the buying by a New York banker, for instance, through the medium of the London market, of exchange drawn on Paris--is another broad and profitable field for the operations of the expert foreign exchange manager. Take, for example, a time when exchange on Paris is more plentiful in London than in New York--a shrewd New York exchange manager needing a draft on Paris might well secure it in London rather than in his home city.