Shares of Apple Inc. and Microsoft are trading higher Tuesday morning, propelling the Dow Jones Industrial Average into positive territory. The Dow /zigman2/quotes/210598065/realtime DJIA +1.35% was most recently trading 81 points, or 0.3%, higher, as shares of Apple Inc. /zigman2/quotes/202934861/composite AAPL +0.68% and Microsoft /zigman2/quotes/207732364/composite MSFT -0.25% are contributing to the index's intraday rally. Apple Inc.'s shares have climbed $3.98, or 1.3%, while those of Microsoft are up $1.59 (1.0%), combining for a roughly 38-point boost for the Dow. Also contributing significantly to the gain are United Technologies , Verizon Communications Inc. /zigman2/quotes/204980236/composite VZ +0.73% , and Procter & Gamble /zigman2/quotes/202894679/composite PG -0.30% . A $1 move in any of the benchmark's 30 components equates to a 6.78-point swing.