By MarketWatch Automation
Shares of Boeing and Dow Inc. are trading lower Tuesday afternoon, leading the Dow Jones Industrial Average selloff. The Dow /zigman2/quotes/210598065/realtime DJIA -0.10% was most recently trading 339 points, or 1.0%, lower, as shares of Boeing /zigman2/quotes/208579720/composite BA -1.08% and Dow Inc. /zigman2/quotes/203121064/composite DOW -0.45% have contributed to the blue-chip gauge's intraday decline. Boeing's shares are down $11.16, or 4.4%, while those of Dow Inc. are off $2.76 (4.4%), combining for an approximately 92-point drag on the Dow. Also contributing significantly to the decline are Caterpillar /zigman2/quotes/203434128/composite CAT +0.67% , Intel /zigman2/quotes/203649727/composite INTC -2.95% , and American Express /zigman2/quotes/203805826/composite AXP -0.19% . A $1 move in any one of the 30 components of the index results in a 6.58-point swing.