欧盟债务危机的全面爆发，引起了人们对两个传统话题的热议，一是政府债券是否永远都是无风险的“金边债券”；二是广大投资者如何应对越来越复杂的“投资风险”。前者属于广大投资者无能为力的事情，后者才是其需要研究和解决的问题。本文通过对投资理论发展过程的历史考察，目的在于说明组合投资是应对投资风险的有效手段；通过对组合投资特点和效果的理论分析，目的在于引起广大投资者对投资组合问题的关注，以便在投资实践中立于不败之地。%The overall outburst of European Union＇ s debt crisis caused peoples heated debate on two conventional topics, one is that whether the governmental bond would always be＇ gilt - edged securities＇ , the second is how would the investors cope with the increasingly complicated ＇inves- ting crisis＇. The former belongs to the issues beyond power of investors, the latter is what we need to research and solve. By historic exploration on the process of investment theory, the essay im- plied to state that the joint investment should be the effective measurement dealing with investment crisis. With the theoretical analysis on the characteristics and outcome of joint investment, the es- say intended to arouse the extensive investors＇ concerning on joint investment, so as to remain invincible in the investment practice.
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