The reason is simple: It's one of only two publicly traded stocks with the highly coveted AAA credit rating from Standard & Poor's. A stock market crash, weaker economy, or rising inflation doesn't suddenly mean that fewer people are getting sick. Annaly Capital Management: 10.4% dividend yield Whereas Johnson & Johnson is probably the safest dividend stock on the planet, mortgage REIT Annaly Capital Management (NYSE: NLY) could well hold the title of safest ultra-high-yield dividend stock.