In the forward market, if the supply is insufficient and the demand is relatively strong, the contract price in recent months will increase more than that in the forward market, or the contract price in recent months will decrease less than that in the forward market. Traders can get the spread by buying the near-term contract and selling the forward contract at the same time.

The bull market spread in the reverse market is opposite to the bear market arbitrage in the reverse market.

The storable commodities that can be used in beef sauce include not only grains such as wheat, but also soybeans and their products, sugar, orange juice, plywood, wood, pork tripe and copper.

Let's take the corn futures contract as an example to illustrate the use of the cow spread. 20 12, 10, 1 20 13, the contract price of corn is 2. 16 USD/bushel, and the contract price in May is 2.25 USD/bushel, with a difference of 9 cents. Traders expect corn prices to rise, and the spread between March and May futures contracts may narrow. Therefore, traders buy 1 lot (1 lot is 5000 bushels) March corn contract and sell 1 lot May corn contract at the same time. By 20 12 12 1 2, the corn futures price rose to $2.24/bushel in March and $2.30/bushel in May, respectively, and the price difference between them narrowed to 6 cents. Traders close two futures contracts at the same time, thus completing arbitrage trading.