This study examines whether mean reversion is present in corn, soybean, wheat, live hog, and live cattle futures prices. Consistent with earlier studies, asymptotic regression results provide substantial evidence of mean reversion in commodity futures price movements. In sharp contrast, the Monte Carlo regression analysis does not provide support for the existence of mean reversion in commodity futures prices. A clear implication is that the asymptotic regression results are misleading. The reason is that the small sample distributions of test statistics are not well approximated by assumed asymptotic distributions. Copyright 1996, Oxford University Press.