Metghalchi, M., Garza-Gomez, X., Chen, C.-P. and Monsef, S. 2005. Market Efficiency For S&P 500: 1954-2004. International Business & Economics Research Journal (IBER). 4, 7 (Jul. 2005). DOI:https://doi.org/10.19030/iber.v4i7.3603.