Behind strong returns for shares of Caterpillar and Walgreens Boots, the Dow Jones Industrial Average is rallying Wednesday afternoon. The Dow DJIA, +1.34% was most recently trading 438 points, or 1.4%, higher, as shares of Caterpillar CAT, +5.55% and Walgreens Boots WBA, +4.77% have contributed around a quarter of the blue-chip gauge’s intraday rally. Caterpillar’s shares are up $10.09 (5.5%) while those of Walgreens Boots have climbed $2.06, or 5.0%, combining for an approximately 80-point boost for the Dow. JPMorgan Chase JPM, +4.37%, Goldman Sachs GS, +5.26%, and Dow Inc. DOW, +4.36% are also contributing significantly to the gain. A $1 move in any one of the 30 components of the benchmark results in a 6.58-point swing.