The competitiveness of the national economies had been resulted from the enhancement of the trade and commercialization activities. The developing nations can be witnessing great enhancement for their economies as a result of the expansion of the financial markets, such as; the stock and the capital markets. Despite of the advantages of the globalization of the financial activities, domestic markets may witness great threats and problems from the international competition. For instance, according to Claessens, Klingebiel, and Schmukler (2002), the domestic markets had been witnessing huge problems from the shifting of the financial trading from the domestic markets to the international and foreign stock markets (Schmukler, 2004). On the other hand, according to Levine et al (2000), the effective management and monitoring for the financial markets can be playing a great role within the development and the strengthening of various dimensions and aspects of the national economy (Seetanah, Sawkut, Sannasee, & Seetanah, 2010). On the other hand, McKinnon (1973) ensured that the government of the less developed countries should be able to conduct sustainable growth and enhancement and development for the various stock markets’ mechanisms that will ensure that they will be enhancing the enhancing the per capita income and will ensure the welfare of the nations (CAPORALE, HOWELLS, & SOLIMAN, 2004). The following paper is reprinting the major capabilities of the stock markets for the influencing of the economics of the developed and the less developed nations. This study would be performed by the analysis of the role that had been played by the stock markets in the economies of Egypt, which is representing the less developed country, and the United States of America, which would be representing the developed country.