Behind negative returns for shares of Dow Inc. and Boeing, the Dow Jones Industrial Average is falling Tuesday morning. Shares of Dow Inc. DOW, -2.44% and Boeing BA, -2.48% have contributed to the blue-chip gauge’s intraday decline, as the Dow DJIA, -0.33% was most recently trading 92 points, or 0.3%, lower. Dow Inc.’s shares are down $1.59 (2.5%) while those of Boeing have declined $6.20, or 2.5%, combining for an approximately 51-point drag on the Dow. Other components contributing significantly to the decline include Walgreens Boots WBA, -1.86%, Caterpillar CAT, -1.79%, and Amgen Inc. AMGN, -1.58%. A $1 move in any of the index’s 30 components results in a 6.58-point swing.