The markets received very little economic news today, and perhaps that’s why the Dow Jones Industrial Average (INDEX: ^DJI ) moved so very little. The index closed the day just slightly higher, up 3.76 points or 0.03%, and now sits at 13,025. Only 18 of the Dow’s 30 components ended the trading session in the green, and we can blame the Dow’s poor performance on a number of different companies, which I have done today. This afternoon I discussed why Merck (NYSE: MRK ) , Microsoft (Nasdaq: MSFT ) , and Travelers(NYSE: TRV ) all moved lower. Read about what caused those four companies to fall into the red by clicking here or stick around to learn why Du Pont (NYSE: DD ) , Caterpillar(NYSE: CAT ) , and Cisco (Nasdaq: CSCO ) also moved lower.