The relationship of cattle prices to feeding costs. It is measured by dividing the price of cattle ($/hundredweight) by the price of corn ($/bushel). When corn prices are high relative to cattle prices, fewer units of corn equal the dollar value of 100 pounds of cattle. Conversely, when corn prices are low in relation to cattle prices, more units of corn are required to equal the value of 100 pounds of beef. A ratio used to express the relationship of feeding costs to the dollar value of livestock.