As many investors start to move toward the seemingly attractive high dividend yield mortgage REIT space, Motley Fool financial analyst Matt Koppenheffer offers some words of caution. He takes a look specifically at one of the more popular mREIT agencies to invest in, American Capital Agency (NASDAQ:AGNC), and gives investors three things that he sees as potential red flags with this company. 

One company often compared to American Capital is Annaly. Annaly Capital Management (NYSE:NLY) has a history of paying huge dividends to shareholders. But there are some crucial issues investors have to understand about Annaly's business model before buying the stock. In this brand-new premium research report on the company, our analyst runs through these absolute must-know topics, as well as the future opportunities and pitfalls of their strategy. Click here now to claim your copy.