Dragged down by negative returns for shares of Walgreens Boots and UnitedHealth, the Dow Jones Industrial Average is falling Thursday morning. Shares of Walgreens Boots /zigman2/quotes/203410933/composite WBA -2.65% and UnitedHealth /zigman2/quotes/210453738/composite UNH +0.07% have contributed to the blue-chip gauge's intraday decline, as the Dow /zigman2/quotes/210598065/realtime DJIA -0.58% was most recently trading 154 points (0.7%) lower. Walgreens Boots's shares have declined $2.22 (5.2%) while those of UnitedHealth are down $8.76, or 3.7%, combining for a roughly 74-point drag on the Dow. Boeing /zigman2/quotes/208579720/composite BA +0.20% , United Technologies , and Home Depot /zigman2/quotes/208081807/composite HD -0.90% are also contributing significantly to the decline. A $1 move in any of the benchmark's 30 components equates to a 6.78-point swing.