The financial markets play an important role in the economies of the developing and undeveloped countries likewise. As they are ones of the financial political tools are used in filling the local savings and an attractive instrument for the foreign investments in addition to its active role in financing the growing economic plans. The study aimed to test the effect of changing exchange rate of the Syrian pound against the dollar on the shares of joint stock companies listed on the Damascus Securities Exchange, the study covered the monthly data for the period extending from July 2011 until November 2015.