Basically, 7+% dividend yield is really good because if the dividend is sound, the risk-reward ratio is better than investing in a growth company not paying a dividend. The market should be bidding up the price of the stock to bring the yield in line with typical yields. Since that isn’t happening, there is a risk that the market is pricing into the stock, either that the dividend will be cut or that the company may become insolvent.

There are high yield opportunities that are safer than others, but that is the general principle to use when analyzing unusually high yields.