From Dow Jones & Company, Inc.:

Boeing Co.’s stock is down 7.9% in premarket trading after its 737-9 Max planes were grounded following a panel blowout on an Alaska Air Group Inc. plane. The drop in stock price could reduce the Dow’s price by 129 points, while other broad-market barometers are also set to underperform. The Dow is a price-weighted index, and Boeing’s stock is the 10th most influential among its 30 components. A 1% move in Boeing’s stock would move the Dow by a little more than 16 points. Additionally, shares of Spirit AeroSystems Holdings Inc. have also tumbled 18.1% in the premarket.



Read more: Boeing’s stock tumble is cutting more than 140 points off the Dow’s price