PM Images AGNC Investment Corp. (NASDAQ:AGNC) is a mortgage REIT, and it is currently sporting a 15% forward yield. It buys Agency MBS assets with short-term leverage through RePo agreements. The first thing I'm going to say is that the 15% forward yield doesn't look sustainable to me, and then I'll spend the rest of the article arguing it could still be a good bet anyway. At the risk of oversimplifying things, when I pull up the latest 10-Q and I scroll down to the income statement, it looks like this: ...