For income investors, this electric utility is worth getting amped up about.Providing investors with a relatively high-yield dividend, American Electric Power (AEP 0.78%) is an attractive option for those looking to bolster their passive income streams.However, smart investors know the importance of thoroughly investigating higher-yielding dividend stocks since the high payouts may actually be imperiling the company's financial health. Let's take a closer look at what electric utility American Electric Powe ...