Shares of Walgreens Boots and Dow Inc. are trading higher Wednesday afternoon, sending the Dow Jones Industrial Average into positive territory. The Dow DJIA, +0.24% was most recently trading 72 points, or 0.2%, higher, as shares of Walgreens Boots WBA, +2.88% and Dow Inc. DOW, +2.72% have contributed to the blue-chip gauge’s intraday rally. Walgreens Boots’s shares are up $1.32, or 2.6%, while those of Dow Inc. are up $1.45 (2.6%), combining for a roughly 18-point boost for the Dow. American Express AXP, +1.34%, UnitedHealth UNH, +1.12%, and Chevron CVX, +1.25% are also contributing significantly to the gain. A $1 move in any one of the 30 components of the index equates to a 6.58-point swing.