One of the basic functions of securities market is to offer market mobility, to supply fund for enterprises and financial products for investors.
证券市场的基本功能之一就是向市场提供流动性：为企业供应资金和为投资者供应金融品。
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If the mobility of the open-ended fund is not good enough, then it will encounter the sudden redeeming of invenstors, which may cause the downward trend and the mobile forfeiture of the whole market.