We analyze the impact of oil prices on stock returns of oil and gas corporations (i) covering four decades of oil price fluctuations. Using both RAC and WTI, we consider four alternative linear and nonlinear oil price specifications. We find that the linear specification oil price changes have a positive significant impact on real stock returns of oil and gas corporations in the short-run. We also provided evidence that a nonlinear specification such as oil price increases has a positive impact on stock returns in the short-run.