Powered by positive growth for shares of Dow Inc. and Merck, the Dow Jones Industrial Average is up Thursday morning. Shares of Dow Inc. DOW, +1.60% and Merck MRK, +1.49% have contributed to the blue-chip gauge’s intraday rally, as the Dow DJIA, +0.15% is trading 48 points (0.1%) higher. Dow Inc.’s shares have risen $1.33, or 1.9%, while those of Merck are up $1.16 (1.6%), combining for a roughly 16-point bump for the Dow. Procter & Gamble PG, +1.37%, Travelers TRV, +1.14%, and Caterpillar CAT, +0.61% are also contributing significantly to the gain. A $1 move in any of the Dow’s 30 components equates to a 6.58-point swing.