The Dow Jones Industrial Average is trading up Friday afternoon with shares of UnitedHealth and Pfizer seeing positive gains for the price-weighted average. The Dow /zigman2/quotes/210598065/realtime DJIA +0.36% is trading 177 points (0.6%) higher, as shares of UnitedHealth /zigman2/quotes/210453738/composite UNH +0.18% and Pfizer /zigman2/quotes/202877789/composite PFE +2.28% have contributed around a quarter of the blue-chip gauge's intraday rally. UnitedHealth's shares are up $10.31 (4.0%) while those of Pfizer have risen $0.84, or 2.3%, combining for a roughly 76-point boost for the Dow. Dow Inc. /zigman2/quotes/203121064/composite DOW +2.06% , Nike /zigman2/quotes/203439053/composite NKE +1.06% , and Johnson & Johnson /zigman2/quotes/201724570/composite JNJ +0.42% are also contributing significantly to the gain. A $1 move in any of the benchmark's 30 components results in a 6.78-point swing.