Which Dow Stock Dropped 20% This Month? By: CNBC.com News November 30, 2011 at 17:23 PM EST The Dow Jones Industrial Average rallied 490 points or 4.24 percent Wednesday, posting its largest point and percent gain of the year. Read More >> Related Stocks: Bank of America Caterpillar DuPont USA GX Defense Tech ETF Hewlett-Packard JPMorgan Chase & Co TravelersCompanies Valero Energy Walt Disney