By MarketWatch Automation
Shares of Dow Inc. and Boeing are trading lower Tuesday afternoon, dragging the Dow Jones Industrial Average into negative territory. Shares of Dow Inc. /zigman2/quotes/203121064/composite DOW +1.43% and Boeing /zigman2/quotes/208579720/composite BA +0.71% have contributed to the index's intraday decline, as the Dow /zigman2/quotes/210598065/realtime DJIA +0.93% was most recently trading 174 points, or 0.5%, lower. Dow Inc.'s shares are down $2.88, or 4.5%, while those of Boeing are off $9.49 (3.8%), combining for an approximately 81-point drag on the Dow. Other components contributing significantly to the decline include Caterpillar /zigman2/quotes/203434128/composite CAT -0.34% , American Express /zigman2/quotes/203805826/composite AXP +0.31% , and Intel /zigman2/quotes/203649727/composite INTC +1.22% . A $1 move in any of the index's 30 components results in a 6.58-point swing.