Shares of Boeing and American Express are seeing strong returns Friday morning, propelling the Dow Jones Industrial Average into positive territory. Shares of Boeing BA, +4.20% and American Express AXP, +3.36% are contributing to the index’s intraday rally, as the Dow DJIA, +1.28% is trading 233 points, or 0.7%, higher. Boeing’s shares have climbed $4.82, or 3.9%, while those of American Express have climbed $5.68 (3.7%), combining for an approximately 69-point boost for the Dow. Also contributing significantly to the gain are Salesforce Inc. CRM, +4.23%, Walt Disney DIS, +2.46%, and Goldman Sachs GS, +2.10%. A $1 move in any of the Dow’s 30 components equates to a 6.59-point swing.