What statement about the category development index $($CDI$)$ is accurate? It is published annually by the Federal Trade Commission. The CDI is another way to express the advertising response curve. It is an indication of the sales potential of a particular brand in a specific target market. The CDI is used to determine the strength of the entire product category$-$not a specific brandin a specific target market. It can be an indication of the economic forecast for a specific product category.