American Eagle's bold moves could be paying off.Apparel retailing is a challenging business. There are low barriers to entry, it's highly competitive, and fashion tastes tend to be fickle. What was a hot brand one year can be ice cold just a few years later, and poor inventory management can lead to widespread markdowns, crushing margins.Just look at Nike or Lululemon. Both of those stocks are among the biggest winners in the history of the apparel sector, but have fallen on tough times lately for a range o ...