AGNC Investment's dividend yield is more than twice as large as Realty Income's, but the lower yield could still be the better choice.One of the big risks for dividend lovers is focusing too much on yield. A great example of the problem here comes from comparing ultra-high AGNC Investment (AGNC +0.09%) and its 13.5% dividend yield to Realty Income (O +0.04%) and its 5.7% yield. AGNC Investment isn't a bad company, per se, but Realty Income is likely to be the better dividend stock if you are trying to live ...