The Dow Jones Industrial Average is declining Tuesday morning with shares of Exxon Mobil and Chevron delivering the stiffest headwinds for the index. Shares of Exxon Mobil /zigman2/quotes/204455864/composite XOM +0.02% and Chevron /zigman2/quotes/205871374/composite CVX +0.20% are contributing to the blue-chip gauge's intraday decline, as the Dow /zigman2/quotes/210598065/realtime DJIA +0.04% was most recently trading 29 points lower (-0.1%). Exxon Mobil's shares have dropped $1.04, or 2.3%, while those of Chevron have fallen $1.94, or 2.1%, combining for a roughly 20-point drag on the Dow. Procter & Gamble /zigman2/quotes/202894679/composite PG +0.13% , Merck /zigman2/quotes/209956077/composite MRK +0.81% , and Dow Inc. /zigman2/quotes/203121064/composite DOW +1.18% are also contributing significantly to the decline. A $1 move in any one of the 30 components of the Dow equates to a 6.86-point swing.