The Dow Jones Industrial Average is in selloff mode Tuesday morning with shares of Nike and Boeing facing the biggest declines for the index. Shares of Nike NKE, -4.28% and Boeing BA, -4.29% have contributed to the blue-chip gauge’s intraday decline, as the Dow DJIA, -1.58% was most recently trading 523 points lower (-1.5%). Nike’s shares are down $5.33, or 4.2%, while those of Boeing are off $6.62, or 3.8%, combining for a roughly 79-point drag on the Dow. Also contributing significantly to the decline are 3M MMM, -3.30%, Salesforce Inc. CRM, -2.46%, and Walt Disney DIS, -2.86%. A $1 move in any of the Dow’s 30 components results in a 6.59-point swing.