Buying for future delivery causes advances in prices; selling short tends to restrain inordinate advances. In each case there must be a buyer and a seller and the interaction of their trading steadies prices. Speculation thus brings into the market a distinct class of people possessing capital and special training who assume the risks of holding and distributing the proceeds of the crops from one season to another with the minimum of cost to producer and consumer.
HEDGING
A considerable part of the business done by these exchanges consists of “hedging.” This term is applied to the act of a miller, for example, who is under contract to supply a given quantity of flour monthly throughout the year. In order to insure himself against loss he makes a contract with anybody whom he considers financially responsible, to supply him wheat at times and in the quantities needed. He “hedges” against a possible scarcity and consequent rise in the price of wheat. If the miller were restricted in his purchases to persons in the actual possession of wheat at the time of making the contract he would be exposed to monopoly prices. If the wheat producer were limited in his possibilities of sale to consumers only, he would be subjected to the depressing effects of a glut in the market in June and September, at times of harvest.
To the trader, manufacturer, or exporter, the act of transferring the risk of price fluctuations to other persons who are willing to assume it, has the effect of an insurance. It enables him to use all of his time and capital in the management of his own business instead of devoting some part of them to contingencies arising from unforeseen crop conditions.
ALTERNATIVE CONTRACTS
In order to eliminate the risk of a shortage of specific grades of the merchandise thus traded in, contracts generally permit the delivery of alternative grades, within certain limits, at differential prices; and if the grade to be delivered be not suitable for the ultimate needs of the purchaser, it can under ordinary circumstances be exchanged for the grade needed, by the payment of the differential. It is true that in this exchange of grades there is sometimes a loss or a profit, owing to some unexpected diminution or excess of supply of the particular grade wanted, due to the weather or other natural causes.
Deposits of cash margins may be required mutually by members at the time of making contracts, and subsequent additional ones if market fluctuations justify.
Dealings for outsiders are usually upon a 10 per cent. margin; obviously, if this margin were increased generally, say to 20 per cent., a considerable part of the criticism due to losses in speculation, particularly as to the Cotton Exchange, would be eliminated.
The major part of the transactions are adjusted by clearing systems, the method most prevalent being “ring settlements,” by which groups of members having buying and selling contracts for identical quantities, offset them against each other, canceling them upon the payment of the differences in prices.