LONDON (Reuters) -Beer giant Anheuser-Busch InBev beat second-quarter profit estimates on Thursday even as beer volumes slipped, dragged back by weak sales in China and Brazil. The world's top brewer by volumes said its organic operating profit in the three months to end-June rose 6.

U.S.-listed shares of AB InBev sank 12% Thursday as the world's biggest beermaker's volume and sales missed estimates on soft demand in China and Brazil.

In its first half, AB InBev saw revenues drop 1.5% in Brazil year on year while volumes slid 2.4%. Second-quarter volumes for the group's overall South America business declined 4