الفهرس 
The General ObjectiveOnly 14 pages are availabe for public view
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Abstract
Liquidity is a concept that is related to ”liquidity preference theory” . the economist john maynard keynard 1930 told in the description of liquidity preference theory that people value money for both the transaction of current business, and its use as a store wealth. thus, they will sacrifice the ability to earn interst on money that want to spend in the present, and that they want to have it on hand as a precaution. on the other hand, when interst rates increase, they become willing to hold less money for these purpose in order to secure a profit.