Both offer high dividend yields. Here's what you need to know before you buy.If you're looking for stocks that pay you to hold them, now is a great time to look at the telecommunications and specialty finance industries.Shares of Verizon (VZ -5.03%) offer an attention-getting 6.5% dividend yield at recent prices. AGNC Investment Corp. (AGNC -3.56%), a real estate investment trust (REIT) with a huge portfolio of mortgages, offers a giant 14.0% yield.If all you look at are dividend yields, AGNC seems like the ...