Dragged down by losses for shares of Dow Inc. and Merck, the Dow Jones Industrial Average is falling Friday afternoon. Shares of Dow Inc. /zigman2/quotes/203121064/composite DOW +2.52% and Merck /zigman2/quotes/209956077/composite MRK +0.60% are contributing to the blue-chip gauge's intraday decline, as the Dow /zigman2/quotes/210598065/realtime DJIA -0.44% was most recently trading 261 points, or 0.9%, lower. Dow Inc.'s shares have declined $2.10 (4.2%) while those of Merck are down $2.41, or 2.7%, combining for a roughly 31-point drag on the Dow. Also contributing significantly to the decline are JPMorgan Chase /zigman2/quotes/205971034/composite JPM 0.00% , Walgreens Boots /zigman2/quotes/203410933/composite WBA -0.38% , and UnitedHealth /zigman2/quotes/210453738/composite UNH -1.04% . A $1 move in any one of the 30 components of the benchmark results in a 6.78-point swing.