The Dow Jones Industrial Average is nearly flat Wednesday afternoon with shares of Microsoft and UnitedHealth seeing the biggest losses for the index. The Dow DJIA, +0.40% was most recently trading 23 points lower (-0.1%), as shares of Microsoft MSFT, -4.37% and UnitedHealth UNH, -2.73% account for -55% of the index’s intraday movement. Microsoft’s shares have declined $12.75, or 5.3%, while those of UnitedHealth have dropped $14.83, or 2.9%, combining for a roughly 182-point drag on the Dow. A $1 move in any one of the 30 components of the Dow results in a 6.59-point swing.