IMAGE SOURCE: FLICKR/LENDINGMEMO.COMThe start to 2016 has been a bit of a roller coaster. Investors were expecting interest rates to climb this year, which led to a big 10% dip at the beginning of the year. But since interest rates have fallen still further (10-year Treasury yields are down about 40 basis points), investors have piled back into stocks, putting the S&P 500 back in the black.Dividend stocks have performed exceedingly well as investors search for yield, which makes finding undervalued and high-yielding dividend stocks more difficult today than it was just a few months ago.