由于交易动机各有不同，在上市公司第一大股东变更当年，投资方也表现出不同的行为特征。

Due to difference of the investors 'trading motive, they also perform different characteristic of behavior in the year of the changing of the largest shareholder.

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对于第一大股东变更的不当行为，需采取建立控制权市场、削弱大股东权利等有效措施来防止。

The improper behavior of the changing of the Largest shareholder needs to take effective measures to prevent, such as establishing market of control right, weakening the right of the big shareholder.

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