Shares of UnitedHealth and Dow Inc. are seeing positive gains Thursday afternoon, propelling the Dow Jones Industrial Average rally. The Dow is trading 423 points, or 1.2%, higher, as shares of UnitedHealth and Dow Inc. have contributed around a quarter of the index’s intraday rally. UnitedHealth’s shares are up $11.97, or 3.0%, while those of Dow Inc. are up $1.60, or 2.8%, combining for a roughly 89-point boost for the Dow. Walgreens Boots Home Depot and Nike are also contributing significantly to the gain. A $1 move in any one of the 30 components of the Dow equates to a 6.58-point swing.