Perhaps the single greatest concern for Apple (AAPL 0.52%) investors is the company's ability to defend its margin moving forward. While some have expressed worries that the introduction of a cheap iPhone would harm these margins, a recent research note from Morgan Stanley's (NYSE: MS) Katy Huberty suggests that the device could actually help. Taking a completely different approach, Andy Hargreaves of Pacific Crest sees margins being protected with a cheap iPhone.

In the video below, Fool.com contributor Doug Ehrman discusses these two views of Apple's margins and why either case is bullish for shareholders and the company.