Does anyone know of a good complete data set for something like NASDAQ or other financial related data?

I checked on DBpedia, but it seems to be an incomplete listing:
http://dbpedia.org/page/Category:Companies_listed_on_NASDAQ

I also found:
http://dbpedia.org/page/Category:Companies_listed_on_the_New_York_Stock_...

Also, I just browse dbpedia by jumping through hyperlinks in the web browser, but this does not seem like the most conclusive way to see all the data offered by dbpedia. Is there a recommended way to find data on there?

Greatly appreciate any tips on this.

Thank you