Behind strong returns for shares of Chevron and Exxon Mobil, the Dow Jones Industrial Average is rallying Thursday afternoon. Shares of Chevron /zigman2/quotes/205871374/composite CVX -3.23% and Exxon Mobil /zigman2/quotes/204455864/composite XOM -2.60% have contributed around one third of the blue-chip gauge's intraday rally, as the Dow /zigman2/quotes/210598065/realtime DJIA -0.58% is trading 342 points, or 1.6%, higher. Chevron's shares are up $6.81, or 9.9%, while those of Exxon Mobil are up $3.11, or 8.3%, combining for a roughly 67-point boost for the Dow. Other components contributing significantly to the gain include Dow Inc. /zigman2/quotes/203121064/composite DOW -1.05% , Caterpillar /zigman2/quotes/203434128/composite CAT -1.37% , and Intel /zigman2/quotes/203649727/composite INTC -2.93% . A $1 move in any of the index's 30 components equates to a 6.78-point swing.