The stock's sharp move down cost the 30-stock Dow more than 150 points. Boeing has by far the biggest influence on the Dow given the index is price weighted. In other words, a higher share price will have a greater impact on the Dow.
Boeing's outsized influence over the Dow could be seen by looking at the index's counterparts, the S&P 500 and Nasdaq Composite. Both the S&P 500 and Nasdaq traded more than 1 percent higher while the Dow was up 0.79 percent. In other words, the Dow would be much higher if not for the aerospace giant's drop.