The phrase "are up about" refers to an increase in something, such as prices, sales, or interest. In contrast, the antonyms for this phrase would indicate a decrease in the same thing. These antonyms could include "are down about," "are lower," or "are declining." When something is "down about" or "lower," it means that it has decreased in value or significance. Similarly, "are declining" means that something is gradually decreasing over time. By using these antonyms, one can provide a more descriptive and accurate portrayal of a situation, rather than just focusing on the positive aspects of an increase.