Shares of Travelers and Procter & Gamble are posting losses Tuesday morning, dragging the Dow Jones Industrial Average into negative territory. The Dow /zigman2/quotes/210598065/realtime DJIA -0.58% was most recently trading 171 points, or 0.8%, lower, as shares of Travelers /zigman2/quotes/206313935/composite TRV +0.72% and Procter & Gamble /zigman2/quotes/202894679/composite PG +1.91% are contributing to the index's intraday decline. Travelers's shares have fallen $2.78, or 2.7%, while those of Procter & Gamble have dropped $2.96, or 2.6%, combining for a roughly 39-point drag on the Dow. Nike /zigman2/quotes/203439053/composite NKE -1.41% , UnitedHealth /zigman2/quotes/210453738/composite UNH +0.07% , and Visa /zigman2/quotes/203660239/composite V +0.75% are also contributing significantly to the decline. A $1 move in any of the index's 30 components equates to a 6.78-point swing.