A warning from management isn't helping the stock today either, especially as it comes just one day after rival Halliburton (NYSE: HAL) gave an encouraging outlook. Looking ahead, though, CEO Lorenzo Simonelli sees a "favorable oil and gas price backdrop but also a dynamic operating environment" that poses several challenges including inflationary and supply pressures for commodities, key raw material, and labor. In contrast, Halliburton, which released its first-quarter earnings on April 19, is hugely optimistic about the oil and gas market.