A Study of the Long-Term Convergence of Bank Profit Rate with Return of Iran's Stock Market

One of the main differences between Islamic banking and interest-based banking is how Profit is paid on bank deposits. In an interest- based banking system, an investor's return is determined by the fixed interest rate and time span of investment; in interest-free banking, however, only Profit portion is determined while the amount of Profit is determined at the end of the transaction and after examining the benefits and losses. According to this research, the degree of Islamic bank's commitment to paying uncertain Profits on bank deposits can be evaluated in terms of the convergence of the amount of bank Profit rate with the amount of stock market's long-run return. To test this hypothesis, the long-term relationship between the bank Profit vate in the banking system of the Islamic Republic of Iran and the cash return of stocks in Tehran stock exchange and the relationship between the Profit rate on short-run stocks and the changes in stock price index from 1374 to 1389 (1995- 2010) have been analyzed. The results of this research which a new bound testing was used show that there is no long-run relationship between the two variables: short-run Profit rates and stock return – concerning cash return or the return resulting from price changes.