Anheuser-Busch InBev (ABI), the maker of Budweiser and Corona beers, shares plunged 13%, their worst drop in over 5 years, after Q2 sales volumes and revenue missed estimates. Still, retail traders on Stocktwits turned 'extremely bullish,' calling the fall overdone. BUD message volume soared 1,200%. Despite 1.9% volume dip, margins improved. US beer demand remains a concern.