Dow Jones Industrial Average index traded lower on Wednesday weighed down by production-oriented Alcoa which tumbled 2.3% and Caterpillar which fell 3.5%. Overall the index shed 0.54% or 71.52 points and settled at 13,126.21 with seven out of nine sectors posting losses. Walt Disney Co lost 1.5% on news its competitor Rupert Murdoch's News prepares to start national sports network on cable television, creating a rivalry for Disney's ESPN.