American beer industry is half full

"The U.S. beer industry is largely controlled by two big players: AB InBev, owner of Bud Light and Budweiser, and MillerCoors, maker of the Coors Light brand. Modelo, whose Corona is the best-selling imported beer in the U.S., runs a distant third, with 7% of U.S. beer sales, according to the Justice Department. Together, AB InBev and Modelo would control about 46% of U.S. sales."

The U.S authorities seek to block the deal between Bud Light's maker Anheuser-Busch InBev with Group Modelo, owner of the Corona brand. If the deal is not block, these two brands would hold 46% of U.S. sale. The U.S decision to block these two companies to merge is a strategy to keep the beer market competitive. Furthermore, It is important to protect small beer companies interests as well since small business keep the economy healthy. They employee people and generate income taxes. Moreover, U.S. intends to avoid beer prices to increase protecting customer's interests. 

Sorce: http://online.wsj.com/article/SB10001424127887323701904578275821720321186.html?mod=WSJ_business_LeadStoryCollection