If you like big yields, be careful you don't reach too far. Here are two yields worth the risk and one that isn't. If you are looking at high-yielding stocks while the S&P 500 Index (SNPINDEX: ^GSPC) is trading near alltime highs, as it is today, you'll likely be considering stocks with higher levels of risk. Simply put, the high yield is the compensation for the extra risk. As an income investor, you need to make sure you are shouldering risks that are worth taking. AGNC Investment (AGNC -0.29%) and its ne ...