Spotting read flags early can play a crucial role in protecting your portfolio. Today, I'm going to look into three stocks to sell. The stocks include two mortgage REITs and a data center REIT. Some investors may focus too heavily on a stock's dividend yield. I urge investors to take a look at troubling signs that may just send these stocks into a catastrophic plunge. Understanding the fundamentals combined with recent performance are two factors that go into investigating a stock. The mortgage REITs have a ...