Shares of Dow Inc. and Walgreens Boots are posting losses Friday morning, dragging the Dow Jones Industrial Average into negative territory. The Dow /zigman2/quotes/210598065/realtime DJIA -4.42% was most recently trading 104 points (0.4%) lower, as shares of Dow Inc. /zigman2/quotes/203121064/composite DOW -6.61% and Walgreens Boots /zigman2/quotes/203410933/composite WBA -3.00% are contributing to the index's intraday decline. Dow Inc.'s shares have dropped $1.93 (3.8%) while those of Walgreens Boots are down $1.08, or 2.0%, combining for an approximately 20-point drag on the Dow. Other components contributing significantly to the decline include JPMorgan Chase /zigman2/quotes/205971034/composite JPM -4.16% , Merck /zigman2/quotes/209956077/composite MRK -2.33% , and UnitedHealth /zigman2/quotes/210453738/composite UNH -3.45% . A $1 move in any of the index's 30 components equates to a 6.78-point swing.