In Islamic banking because of the nature of the contracts and instruments of communication necessary between the money market and capital than traditional banking. Therefore, the main purpose of expansion of communication paths between the banking system and capital markets within the framework of Islamic economy, while moving away from trading interest, development of new financing instruments, communicate more with each other and to seek financial markets, economic growth in Islamic countries is.The present study using library resources and the Internet, gives attempts to prove the hypothesis that "money and capital markets through mutual funds and construction of fixed assets linked to restore financial stability. The relation between exchange contracts and participation by these funds is explained by the example of the housing market and the risks and advantages and disadvantages will be mentioned. " Paper banking system and the capital market in the context of cross-linking of economy, this results in a fixed rent funds in addition to eliminating the need for fixed assets (housing, land, building, production line), the possibility of taking out bank Gary possible to combine fixed income and variable deposits and the possibility of recycling (returning to economic cycles) facilities provide. The joint venture fund the construction of fixed assets, the provision of the above will contribute to the production cycle and increase economic growth.