Shares of large-cap oil and gas majors Chevron (CVX 1.61%), APA Corporation (APA 1.57%), and oilfield service provider Halliburton (HAL 3.29%) fell hard in April, down 18.7%, 26.1%, and 21.9%, respectively, according to data from S&P Global Market Intelligence.Of the three stocks, only Halliburton reported earnings during the month. But that was largely inconsequential to the price decline, as the across-the-board sector declines came on the heels of the biggest monthly decline in oil prices since November ...