BOSTON ( TheStreet) -- The Dow Jones Industrial Average has advanced 7.8% so far in 2010, less than half of 2009's 19% increase. The Dow has also trailed the S&P 500 Index and Nasdaq Composite. Some of its components have done even worse. Here are the five worst-performing Dow dividend stocks of 2010. They may continue to underperform the market in 2011. On the other hand, some trade at discounts to comparable investments and may be due for a rebound. Below, they are ordered by 2010 return, from bad to worst.