ExxonMobil (XOM, Financial) has announced through a regulatory filing that its third-quarter earnings from oil and gas production, also known as upstream earnings, are expected to decrease by $600 million to$1 billion due to fluctuations in oil prices. The energy giant's earnings are highly sensitive to changes in oil prices.This anticipated earnings decline underscores the volatility of the oil market and its direct impact on companies involved in oil and gas exploration and production. As one of the worl ...