remote continual verification system

Then the continuous T test was used to analyze the portfolio risk marginal reduction as the increase of numbers of securities in the portfolio.

利用连续T检验分析了组合风险随组合中证券数目边际变化趋势,结果表明:在1995~2006年,当组合中证券数目为13个左右时,组合的风险和组合中证券数目的匹配较优。