Aziz Shamuratov /iStock Editorial via Getty ImagesIntroduction Apple (AAPL) is having somewhat of a hard time. Five of its past six quarters had negative sales growth, dragged down by its flagship product, the iPhone, which is pressured by headwinds, including stronger competition from Chinese producers. However, its shares soared by more than 6% after the recent earnings release, as the producer noted that it expects the next quarter to see growth. It also revealed $110 billion in additional buybacks!  ...