Last fall, following its third-quarter earnings report, shares of AB InBev (NYSE: BUD) began what would become a precipitous 20% slide, settling at just over $100 per share. The results themselves, which included a 2% drop in net income where analysts had been projecting a 4% increase, left much to be desired. However, for those investors willing to look past its current difficulties, that share price drop might just represent an ideal opportunity to buy shares in the gargantuan beer brewer. Here’s why.