Dow, along with Dow Jones, and DJIA, is one of the most commonly accepted abbreviated terms used to describe the Dow Jones Industrial Average, an index used to determine how stocks are trading. Dow uses an average of the thirty largest publicly held companies to determine its report, and was created by nineteenth-century Wall Street Journal editor and Dow Jones & Company co-founder Charles Dow.
With more interest being paid to the state of the economy than ever, you can always find bloggers eager to share their thoughts on the Dow. You'll find them at places like CNN Money and other Money Blogs.
Dow is also an abbreviated name for the Dow Chemical Company.