The Dow Jones Industrial Average is trading up Friday morning with shares of Merck and Caterpillar seeing positive growth for the price-weighted average. The Dow /zigman2/quotes/210598065/realtime DJIA -0.07% was most recently trading 68 points, or 0.3%, higher, as shares of Merck /zigman2/quotes/209956077/composite MRK +2.13% and Caterpillar /zigman2/quotes/203434128/composite CAT -0.51% have contributed to the blue-chip gauge's intraday rally. Merck's shares are up $0.81, or 0.9%, while those of Caterpillar have risen $1.14, or 0.9%, combining for an approximately 13-point bump for the Dow. Also contributing significantly to the gain are Travelers /zigman2/quotes/206313935/composite TRV -0.57% , United Technologies , and Home Depot /zigman2/quotes/208081807/composite HD +1.36% . A $1 move in any of the Dow's 30 components equates to a 6.78-point swing.