It's not too late to buy 14%-plus-yielding AGNC Investment, but you'd better know why you're buying it or you could end up getting burned.AGNC Investment (AGNC -0.48%) is not an easy stock to understand. It's often viewed as an income investment because of its huge 14%-plus dividend yield. Only dividend investors have been let down by the company's long string of dividend cuts. You need to take a different view of AGNC if you want to buy it. Here's what you need to know about this niche real estate investme ...