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. 

Matt Koppenheffer has no position in any stocks mentioned. The Motley Fool owns shares of Annaly Capital Management. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.